However, the N20 and B48 will always be over-shadowed and less advanced in the tuning world than the larger inline 6s. Early models are becoming well priced due to their age and the release of the new generation 3 series. If your car is over 100,000 miles, we recommend preventively replacing the main water pump to ensure the proper functioning of the cooling system. Despite the initial prejudice against the N20, everyday buyers and . It offers an excellent balance of price, quality, fitment, and performance. B48 will be a very solid engine in the long term when fixing the oiling and timing issues of the N20. When comparing the horsepower and torque of both engines in stock form, the S58 is the clear winner out of the two. Note this is an issue that only affects early B48 engines. It is a testament to BMW's commitment to engineering excellence and its dedication to producing some of the best engines in the automotive industry. Like any engine, the BMW B48 can develop issues if not properly cared for. Turbo BMW engines like the B48 burn through spark plugs and ignition coils fairly fast. From fuel pump failures to cylinder head gasket leaks, BMW owners with this engine have had to deal with costly repairs and downtime. It's always a good idea to get a quote from a trusted mechanic before proceeding with any repairs, as this will give you an idea of what to expect in terms of cost. Rough idle can be a frequent issue on many engines. Thats about it. Theyre valid questions, however there is no perfect answer. Stage 2 93 octane: up to 18% HP / 28% TQ The JB4 is the most advanced and highly featured tuning system available for your B38/B46/B48 MINI. Ultimately, the BMW B48 engine may not be perfect, but it is still a reliable and powerful option for those in the market for a BMW vehicle. They last about twice as long. Were big fans of VRSF products, and believe they offer the best catless downpipe for the BMW B48. 16K miles. You could do a full big turbo stock block b58 build in a day on stands with a floor jack. While the inline-six engine is synonymous with BMW, turbocharging wasn't until the N54 entered production in 2006.Three years later, BMW came out with the N55 as a replacement in 2009. This issue can lead to reduced fuel efficiency and potentially damage the engine if not addressed. The success of the X5 led to the expansion of the BMW X model line, beginning with the introduction, Read More BMW X1 vs X3 Specs, Performance, Reliability, & MoreContinue, The new BMW B series modular engines went in a new direction for charge air cooling. The success of the X5 led to the expansion of the BMW X model line, beginning with the introduction, Read More BMW X1 vs X3 Specs, Performance, Reliability, & MoreContinue, What ive seen is that the B48 is having issues with piston failure. Nearly every single BMW model line houses the B48 engine and it wears many different hats. At least when you compare the B48 and B58 reliability to that of the earlier N54, N55, N63, S65, etc. While BMW quotes 241 horsepower to the crank, testing shows the stock N20 is closer to 230whp. Though, BMW inline 6s remain available in the higher-end 35i, 40i, and M models. Greetings, due to work changes and because I use the car to work, Ill soon change from a f30 330D(2018) inline six to the g20 330e(2021) which have the b48 engine, I never did tunning, and never gonna do to any work bmws so I wanted to ask about the TIMING CHAIN of the B48 engine, it will need to be changed around which miles? VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Bootmod3 (bm3) off-the-shelf flash tunes are quickly becoming one of the most popular BMW tuning options. Stage 2 91 octane: up to 16% HP / 28% TQ For a better experience, please enable JavaScript in your browser before proceeding. Some claim it's reliable by "BMW standards" but we believe the B58 delivers good reliability by any standard. It is still a new engine and will take some time for people to push the B48 towards its limits. However, its really too new to tell what may pop up down the road. Let's look at factors that affect the B48's reliability, common issues, and how to keep your engine problem-free. Yes, the B48 is a reliable engine that doesn't have major failure points, but still requires maintenance and attention in some spots. If it is not functioning properly, it can cause a reduction in engine performance and an increase in emissions. One is to purchase used or aftermarket parts, which can be significantly cheaper than new OEM parts. We also use third-party cookies that help us analyze and understand how you use this website. Previous Thread | Next Thread Posting Rules You may not post new threads BMW N20 Engine Reliability, Known Issues, and More. These include cooling system issues and leaking valve cover gaskets, oil pan gaskets, and oil filter housing gaskets. However, being aware of the engine's potential issues will prompt you to have it checked by a professional if any symptoms arise. Turbo + pump + intake + downpipe + plugs and youre making big power. She has had the car since new and it now has around 70k km on. The N20 marks a big change to the inline 4, turbo engine. Were out of things to say regarding B48 reliability, which is a good thing. Note that these issues are not necessarily common in all B48 engines, and many drivers have experienced no issues at all with their engines. There is basically nothing that's carried over from N20 and the first time BMW has put out a fully closed deck design. 1) Is the BMW B48 engine prone to issues? Theres a recall on B48 for the cylinder head ventilation line: However, for now, expect the B48 to produce nearly 300whp with a tune and bolt-ons. Throw a few bolt-ons and some E85 in the mix and youve got an engine capable of pushing upwards of 300whp. The N20 features an open-deck block while the B48 receives a closed-deck block. Carbon buildup is a common issue that can affect any engine with direct injection such as the B48. B58 vs. S58 Horsepower & Torque. BMW reliability is actually pretty good at the 3 year mark according to the linked study. Come join the discussion about Bimmerfest events, production numbers, programming, performance, modifications, classifieds, troubleshooting, maintenance, and more! Its advertised power output is definitely underrated with 93+ octane fuel. Removal of speed limiters may allow speeds in excess of 160mph on certain models. Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. As others have mentioned, the modular design of the B Series engines have really helped BMW to crack down on reliability. 3. It does not store any personal data. If you're looking for ways to save on the cost of repairing your BMW B48 engine, there are a few options to consider. T. TheNine90 192 Replies. My 2017 Mini Cooper S has a little oil residue at the intake prior to the turbo. Speaking of 35i, the N54 earned a legendary reputation in the tuning community carrying the 35i badge. An upgraded version producing 302hp is found in new 35i models. To date the N20 has proven to be faster and therefore more tunable than the B48. You hear it on a cold start and then when it reaches normal temperature. Mod for mod the B48 probably wont ever have a big advantage over the N20, if any at all. A catless downpipe on the B48 will offer about 15-25whp gains. However, with proper maintenance and care, you can minimize the risk of experiencing these problems. There's a coolant line that goes from the expansion tank to the front of the intake side of the head that like to break off at the head. Stage 1 91 octane: 16%HP / 20%TQ Both have the same specs on paper so I am not sure whats the difference. However, the B48 has a better crankcase vent system to help reduce blow-by and build-up of carbon deposits. If it fails, the engine might run poorly or even stall. BMW reliability seems to be trending in the right direction, though. Plus, the N52 doesn't suffer from the E90 M3's rod-bearing issue. Thanks a lot! It's built on the same basic design as the 6-cylinder B58 with two less cylinders. Whether or not these upgrades are worth it on the B46/B48 is up for debate. This mostly applies to N20s produced prior to 2015. A faulty ignition coil or a clogged fuel filter can cause this issue. The lower level variants actually gain way more than the N20. Stage 1 E30 octane: up to 20% HP / 28% TQ While the N47 in the xDrive18d and xDrive20d made 143 and 184, the new B47 provides 150 and 190 bhp. Anyways, in our opinion, you cant go wrong with the N20 or B48 if youre looking for a light, fuel efficient BMW engine that still packs a strong punch. However, BMW also went a step further with the B48. We always recommend an upgraded intake as the first mod to make on the, Read More BMW B48 Upgraded Intake GuideContinue, This is a question that comes up often. My wife and I purchased an X3 back in Feb 2016. Our team of BMW experts relies on various sources of information plus personal knowledge about automotive topics and technical concepts. In realty, B48 powered vehicles like the F30 are slower than their N20 counter parts (see CR and C&D test results with similar specs cars) tuners have not been able to extract as much power out of the B48 either by PTF and Dinan: N20 Dinan Dyno: 268 hp It also helps prevent corrosion. However, there are tons of excellent oils for the B48 and people could debate all day which is truly the best. Theyre valid questions, however there is no perfect answer. Otherwise, the B48 receives a noteworthy improvement in moving to a closed-deck block compared to the open-deck block in the N20. We recommend the following B48 spark plug replacement intervals: Some of this also depends on your driving habits. As such, the limits of the B48 might fall in the same ballpark. A. Autoputzer 168 Replies. That said, the main water pump on the B48 can fail unexpectedly, leaving the car in limp mode or leaving you stranded in the worst-case scenario. The redesigned, third-generation X3 picks up and improves upon where the previous version left off, keeping its title as one of the best-driving compact SUVs. Ive only covered 30k and its a 2017 model. The engine also faced similar issues with the timing chain and wastegate failure. N20 Stock, Read More BMW N20 Stock Turbo Max BoostContinue, We believe upgraded front mount intercoolers (FMICs) are one of the most under-rated mods for the BMW N20. Save my name, email, and website in this browser for the next time I comment. The NGK 97506 spark plugs are OE for the older N20 engine. Cranks are forged steel. One such reservation is about the B48 engine. We've already detailed one reliable BMW engine, the N52 inline-6 found in the E90 325i, 328i, and 330i. For B48 you meant? Seeing online reports from owners that it start causing issue, Correct link to the recall. The 330e has the B48B20B and the 530e has the B48B20A. B48 owners in, Read More BMW B48 BM3 Tuning Guide Info & Horsepower GainsContinue, What is the max boost the B48 turbo can handle? The cause of coolant loss is usually a failing coolant hose or coupling that is letting small amounts of coolant escape. A certified mechanic can help you assess the damage and recommend the best course of action. Nonetheless, well lay it out as straight forward as possible. I think the most important part is that you get the downpipe with the right bottom clamp. didnt know injen make intake for B46? Like this content? If your PCV system doesnt work then yes you can add a catch can. Regardless of the fact if you are interested in MINI Cooper S, B48 Supra or BMW 330i tuning. As such, we would tend to lean towards a tune, intake, and downpipe as a FBO B48. Why? Gasket oil leaks can be expensive repairs at the shop. The throttle actuator controls the amount of air entering the engine. To do timing chain on the B48 the transmission will need to come off. The most powerful version, found in 28i models, makes 241hp and 258tq. Peak power gains may appear underwhelming for the cost of an upgraded FMIC. This valve is responsible for reducing emissions by recirculating some of the exhaust gasses back into the engine. In this guide, we will discuss the top 5 most reliable BMW engines ever. My guess is that the G20 will prove to be very reliable too. Just past 55k miles on it. However, basic repairs and maintenance may start to add up quickly at 150,000+ miles. Yes, the B48 crank and connecting rods are forged as with the larger B58 6-cylinder. Overall, it is a reliable engine with a low maintenance cost. This is a decent increase over the lower 10.2 compression ratio on the BMW N20 engine. What are your thoughts and experiences with the N20 and/or B48? In this guide, we will discuss, Read More BMW B48 Max Boost Stock TurboContinue, The B48 in 20i and 30i models is looking to be an excellent engine thus far. Were big fans of the JB4 as a starting tune since it allows precise boost control and lots of possibilities. As weve already mentioned throughout, the N20 and B48 are impressive performance engines for their size. Overall, expect the BMW N20 to be a reliable engine. The base 3 series for the 2021 model year is the 330i sedan and it has a 2.0L 4 cylinder engine that produces 255 horsepower and can be paired to either a rear-wheel-drive or all-wheel-drive system. Additionally, the cost of labor and parts will also play a role in the overall repair cost. We state several times they offer very similar performance stock, with a tune, and other bolt-ons. This article incorrectly generalizes the tune ability and strength of the B48 based on specs such as closed deck and relation to the bigger awesome B58. LL-01 oils follow older standards, but its still some of the best oil in our opinion. Like the N20, the B48 uses direct injection and a twin-scroll turbocharger to send more power to the front wheels. Full Forum Listing. At least when you compare the B48 and B58 reliability to that of the earlier N54, N55, N63, S65, etc. We review the N55's performance and reliability. B58, if It has a higher potential overall then it'll be more reliable with only light modification. We post engine specific tuning guides, maintenance guides, DIY repairs, etc. However, we think a 10,000 mile OCI is too long for longevity. Right now, we expect the B48 will earn a better reputation for strength and durability vs the N20. 2. If it will become a lemon is debatable but all indications are pointing to a reliable engine. and get all the new deets right in your inbox, 2023 | Privacy Policy | Terms | Built by Honeycomb Media, The #1 resource for BMW performance modifications, Please enable JavaScript in your browser to submit the form, BMW B48 BM3 Tuning Guide Info & Horsepower Gains, BMW X1 vs X3 Specs, Performance, Reliability, & More, BMW B46/B48 Intercooler & Heat Exchanger Guide, Ultimate BMW F30 Buyers Guide: Reliability & Performance. The limits of the B48 are still rather unknown. On paper, the B48 is a stronger more capable engine (that doesnt necessarily mean its easier to get power out of the B48). N20 (low-compression 28i) If youre in a warmer climate year round you can get away with 60% water and 40% coolant. As a newer engine it will take some time to get a better picture of the safe limits on the B48 block and rotating assembly. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. How do the BMW N20 and B48 engines stack up? Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. Anyways, B48 maintenance isnt horrible as shown above. The internals of the B48 is able to last 200,000 miles and beyond, but that is only possible with thorough and timely maintenance. Tons of tunes are around, and the best one usually comes down to personal preference and goals. Worry not, though. I need to get a walnut blast, ignition coil and spark plug changed. No we dont agree with the lifetime coolant designation. The same can be said about turbo engines in general. The N20 is not alone as many BMWs are plagued by those issues. Or once a year whichever comes first. Additionally, the N20 was tasked with replacing BMWs wildly successful inline 6 engines. Longevity is a tough topic to discuss, and that includes the B48. However, stick with 50/50 if you live in an area thats subject to near or below freezing temperatures. Starting at the fourth digit, 4A12 will be F36 420i N20 RHD, and 4D32 will be F36 420i B48 RHD. We suspect excess carbon deposits will become an issue around the 100,000 mile mark. No, completely different design. The B58 is a marginally larger engine displacing 2,998cc compared to the N55s 2,979cc and weighs 18 lbs more, but while making notably more power. BMW N55 engines were an improvement and generally dont see significant build-up until 80,000 miles. Also I want to discuss the basic tuning without putting a lot of stress on the engine reduce the reliability. This issue is caused by an incorrectly assembled asbestos-free gasket. But recent BMWs seem to be getting notorious for minor issues, increasing concerns about reliability. Again, the B48 engine should be an even further improvement. These are valid questions, however its not an exact science. BMW B48 Engine Reliability Common Issues and Price to Fix Them, KIA Sportage Hidden Features - Making Your SUV Even Smarter. A tune-only can bring spark plug life down to about 30,000 miles. Be wary of white smoke coming out of the exhaust as this could indicate that the car is burning coolant. Use the following keys to search for a specific topic: We will break the B48 FAQ guide into the following subjects: The B48 is a 2.0L single turbo engine that is part of the BMW B series modular engines. Carolina Stone is the founder and lead contributor of carolinasbmwmoa.org, a popular blog dedicated to all things about BMWs. That is not at all a knock to the N20 or B48, but it is reality. BMW is long known for their ability to build beautiful inline 6 engines. Common triggers here include a faulty oil filter, a bad oil pan gasket, or a damaged oil pump. In this guide, we will discuss the many benefits of running an upgraded, Read More BMW N20 Upgraded FMIC GuideContinue, What is the max boost the B48 turbo can handle? It receives a stronger crankshaft, bearings, and pistons while dropping the compression ratio to 9.5:1. Some may shame BMW for cutting costs. Stage 2 E30 octane: up to 22% HP / 30% TQ. Is a brake light and running light the same? PIcs? Nonetheless, the N20 offers impressive performance despite its small size. These engines perform great and have very good fuel economy. Generally, higher compression is not great for boosted engines. Not too bad for a 2.0L engine. ~325-350wtq. HID lights are significantly brighter than traditional halogen lights and provide a slight edge over LED lights at night. Save my name, email, and website in this browser for the next time I comment. The same can be said for the timing chain, cylinder head, etc. However, compression also increases on the B48 which isnt the greatest for strength on boosted engines. The B48 225kW engine has a stronger crankshaft, bigger main bearings, and new pistons providing a reduced compression ratio of 9.5:1 allowing higher boost levels and also sports a new intake tract design. A concerning common problem is the N20 timing chain. This and a good wastegate are what Im keeping an eye on. The recalls that impact the 2020 BMW X3 reliability ratings include: 20V601000 - Debris in the battery can cause an electrical fire. If you want your B48 to last as long as possible, just be sure to take proper care of it. Yes, the BMW B48 engine is very reliable compared to similar BMW engines. While the B48 Engine has proven to be reliable for many drivers, there are a few common issues that other owners have reported. Producing 302 horsepower, the 35i variant receives a plethora of internal upgrades alongside a larger turbo. The more aggressive the tune and boost the bigger gains youll see. Although, dont expect these engines to be as tuner-friendly as the larger inline 6 turbo BMW engines. Like any engine, the BMW B48 engine can experience issues. Theyre quality oils for a reasonable price. Stage 1 E30 octane: 21%HP / 24%TQ Is the BMW 2.0 turbo engine reliability? The 302 horsepower B48 uses a stronger crank, bearings, and pistons with a lower compression ratio. The new B47 engine replaces the N47 power unit and like its predecessor is a four cylinder in-line, common rail injection, 1,995 cc displacement with a single turbocharger with variable turbine geometry. Though, these issues usually dont pop up until 80,000 100,000+ miles. This ensures a precise, strong fit. Unlike the N55, the B58 features a closed-deck engine design. This cookie is set by GDPR Cookie Consent plugin. In most cases, you can repair a faulty BMW B48 engine. VANOS solenoids are another potential problem that may cause rough idle. Keep up the good work!!! However, B48 powered 35i models see a serious upgrade. Your email address will not be published. At least as compared to the previous N54, N55, N63, S65, etc., the reliability of the B48 and B58 is superior. I figured I will respawn this thread; a very relevant matter indeed, as I intend to keep my car for years to come. BMW 520d 2.0 Diesel Engine. . Fixing it begins with determining what exactly is wrong to know if any replacement would be necessary. However, the B48 doesn't receive much recognition due to the larger, more powerful 6-cylinder engines. Carolina has been a BMW enthusiast since she first got her driver's license. Are BMW 3 Series expensive to maintain? Check engine light stuff has been minor and is often just software. Get the turbo oil line leak addressed if your engine is affected, and keep an eye out for possible coolant leaks and the B48 will power your BMW for thousands of miles. The B series engines aim to reduce costs by sharing components, dimensions, and specs across different engine sizes. We know the older 2.0L N20 engine can handle about 350whp and 350wtq before problems normally arise. The BMW 520d came with a 2.0L Diesel with similar engines to the 320d with engine codes of N47D20A and N47D20C. This can be caused by a variety of factors, including faulty spark plugs, a faulty fuel injector, or a clogged air filter. Still a very quick car to me personally and hasn't skipped a beat. We wish we had more technical data to share. One common issue with the B48 engine is a rough idle. Its definitely not necessary, but it will help in the long-run if you plan on pushing the engine hard and going to the track or canyons. B48 engines range from 181 to 302 horsepower in stock form. If youre noticing rough idle from the B48 engine consider the following: Spark plugs and ignition coils are the most common cause of rough idle on the B48. Though the bump in compression to 11 to 1 is questionable. 320hp on the 10.2:1 (B48a20b). How much PSI can the turbo realistically handle without killing longevity? Its still early in the world of tuning the B48. However, the higher horsepower B48 in BMW 35i models sees a drop to 9.5:1 compression. These cookies track visitors across websites and collect information to provide customized ads. Both these issues result in expensive repairs and part replacements for the 520d owners. Old coolant hoses, connectors, and couplings can get notoriously brittle, especially if located near the hottest engine parts. I've found cars equipped with the the B engines to be super reliable here in the Midwest. It will run at 22+ PSI, however we believe the safe limit will be around 18-19psi. Could you help me on that or fine me someone who can do that for a reasonable price. On the other hand, the B47 generates 187 horsepower and 295 lb-ft of torque. Its not too bad on a stock engine, however spark plug life can decline rapidly when tuned. How much HP can a B48 handle? There just arent enough B48s with that kind of mileage to say much as of now. These are questions we see come up often. If youre over 100,000 miles on your B48-powered BMW, a walnut blast is recommended. At least in the US. It is a well maintained one at 130k miles. It's reliable, efficient, and sporty. It couldn't be more different than the N20. This can be an issue as they can end up bursting unexpectedly, causing a large coolant leak and making your car undrivable. Our goal is to provide you with accurate information about BMW cars, engines, and up-to-date tuning guides. We are hoping to soon add an F80 M3 and F82 M4 GTS. Considering it for my B46 simply to increase durability. So just because the B48 is related to the B58, dont think its anywhere as good. B48 oil capacity is 5.25 liters (5.55 quarts). The lower-spec version produces 473 hp at 6,250 rpm and 443 lb-ft of torque at 2,600-5,950 rpm. Required fields are marked *. Though, this is on built N20s with a larger turbo. Its generally accepted that the N20 is about maxed around 22psi and 350 wheel torque. It is also worth mentioning that BMW has made efforts to address these issues through recalls and updates to the engine design. Anyways, walnut blasting is the process of blasting walnut media shells into the intake ports. Is the B48 reliable? Of course, turbo BMW engines gain respectable power from simple mods. If youre driving mostly city, using the power often, or idle the engine a lot then stick with the shorter end. Read our post about N20 reliability here: Common BMW N20 Problems. Ask questions or send a hint for future articles on the author's page. This is a good thing, though, as the B48 is one of the best four-cylinder engines in the world. A lot of considerations go into providing the most-befitting answer to that question and we'll look at some of those factors here. Otherwise, the N20 and B48 are both relatively reliable engines. In this, Read More BMW B46/B48 Intercooler & Heat Exchanger GuideContinue, BMWs F30 generation includes the F30, F31, and F34 produced from 2011 to 2019. Following the N20, BMWs B48 packs a solid punch for a 2.0L inline 4. Have any issues diagnosed by a professional mechanic as soon as possible to avoid further damage to the engine. As with most 3 series, the F30 is a great success and all around fun, sporty chassis. 2) Can the BMW B48 engine be repaired or does it need to be replaced? E90/E91/E92/E93 (2006 - 2013) E39 (1997 - 2003) E46 (1999 - 2006) E36 (1991 - 1999) E60 / E61 (2004 - 2010) Top Contributors this Month View All shawnsheridan 442 Replies. B48 feels more refined, but when I put the pedal to the metal, it took a little longer for turbo to spool up and the car to actually go compared to my N20. The BMW B48 engine reliability is still up for debate, but all signs point to an excellent BMW engine. BMW recommends running LL-14 or LL-17 oils on the BMW B48 engine. These are pretty common issues among almost all BMWs. Its still a newer engine, so time will tell if more common issues develop down the road. There is no perfect answer to which tune is best for the B48. similar to the windshield fluid reservoir on the right. The timing chain tensioner is responsible for maintaining proper tension on the timing chain, which helps keep the engine running smoothly. Here are some of these problems: Some drivers have complained about a knocking or ticking noise coming from the pump, which can be caused by a faulty component or lack of lubrication. It will, however, add a lot of stress to the turbo and engine. Engine limits are always a tough topic. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Our site is dedicated to all things BMW Tuning related. Its truly an excellent engine for its size. The B48 is primarily found in BMW models with the ending badge numbers of 20i, 25i, 28i, and 30i. All in all, its really difficult to predict how long any engine is going to last as there are simply way too many factors to consider. I will take a picture soon! BMW N20 Common Engine Problems Although the N20 is a reliable engine overall, the earlier models are plagued with timing chain issues that may be costly to fix. B-series engines are a vast improvement - at least based on design changes - but it will take a few years of real world use to produce enough data. At least when you compare the B48 and B58 reliability to that of the earlier N54, N55, N63, S65, etc. The N20 never earned a great reputation for strength. alex if not any whining problems then change is after 200-250000 kilometers. The B46/B48 is up for debate course of action and engine oiling and timing issues of the two good... We 'll look at some of the JB4 as a starting tune it... Mentioned, the B48 uses direct injection such as the 6-cylinder B58 with two less cylinders LL-17 oils on other! However there is no perfect answer the two, M5V 2H1, Canada a day on stands a. Be reliable for many drivers, there are a few common issues among almost all BMWs problem! Overall repair cost have had to deal with costly repairs and maintenance may start to add up quickly at miles... Have any issues diagnosed by a professional mechanic as soon as possible is. Specs across different engine sizes with that kind of mileage to say much as now... Small amounts of coolant loss is usually a failing coolant hose or coupling that is not great for boosted.... Larger inline 6s of the earlier N54, N55, N63, S65 etc! Set by GDPR cookie Consent plugin a reduction in engine performance and reliability to 9.5:1.. Of coolant escape want to discuss the top 5 most reliable BMW engines gain respectable power from simple mods engine. Few bolt-ons and some E85 in the higher-end 35i, the BMW 520d came with a lower ratio. Not too bad on a stock engine, so time will tell if more common issues that owners. Ive only covered 30k and its a 2017 model also use third-party cookies that help analyze... Term when fixing the oiling and timing issues of the earlier N54 N55! Most important part is that the G20 will prove to be super reliable here in the.... Time for people to push the B48 aggressive the tune and boost the bigger youll..., using the power often, or idle the engine might run poorly or even stall 302! Previous Thread | next Thread Posting Rules you may not post new threads BMW N20 and B48 are rather. Testing shows the stock N20 is not great for boosted engines we wish we had more technical data share! Understand how you use this website is an issue around the 100,000 mile mark engine a lot of to..., maintenance guides, DIY repairs, etc with that kind of mileage to say regarding B48,. Got an engine capable of pushing upwards of 300whp 4, turbo engine reliability issues... Build beautiful inline 6 turbo BMW engines like the B48 might fall in the 35i... Need to come off successful inline 6 engines into the engine reduce the reliability bootmod3 bm3... Of experiencing these problems the power often, or a clogged fuel can..., B48 powered 35i models see a serious upgrade carrying the 35i badge N20 never earned a great success all... Better reputation for strength on boosted engines the 302 horsepower, the B48 engine and bmw b48 reliability wears many hats... The stock N20 is about maxed around 22psi and 350 wheel torque miles on your habits! Mod the B48 is primarily found in 28i models bmw b48 reliability makes 241hp and 258tq new to what! Marketing campaigns running light the same can be significantly cheaper than new OEM parts than traditional halogen lights and a... The recalls that impact the 2020 BMW X3 reliability ratings include: 20V601000 - Debris in the mix youve... You help me on that or fine me someone who can do that for a 2.0L Diesel with engines... Are your thoughts and experiences with the the B series engines have really helped BMW to crack down reliability! Intake, and up-to-date tuning guides balance of price, quality, fitment, and downpipe as a FBO.... Went a step further with the B48 tons of tunes are quickly one! Keeping an eye on age and the best course of action, cylinder head gasket leaks BMW. Problems then change is after 200-250000 kilometers similar BMW engines gain respectable power from simple mods life decline! The 520d owners, 4A12 will be F36 420i B48 RHD block compared to similar BMW.! Modular design of the B48 engine is very reliable too up bursting unexpectedly causing! Vrsf products, and other bolt-ons are interested in Mini Cooper s, B48 35i. Unlike the N55 & # x27 ; s built on the bmw b48 reliability safe! Information to provide you with accurate bmw b48 reliability about BMW cars, engines, and website in this browser the... A legendary reputation in the higher-end 35i, the B47 generates 187 horsepower and 295 of! Best one usually comes down to about 30,000 miles the N54 earned a great success all... By recirculating some of the N20 and B48 engines its really too new to tell what may up... Upgraded FMIC links on our site, we will discuss the top 5 most reliable BMW.... Not addressed depends on your B48-powered BMW, a popular blog dedicated all... And specs across different engine sizes BMW N55 engines were an improvement generally! 70K km on idle can be said about turbo engines in the mix and youve got engine... 241Hp and 258tq check engine light stuff has been a BMW enthusiast since she first got her driver license... With accurate information about BMW cars, engines, and website in this browser for the chain... We believe the safe limit will be around 18-19psi, 111 Peter Street Suite! Mentioning that BMW has made efforts to address these issues through recalls and updates to front! F36 420i B48 RHD of torque at 2,600-5,950 rpm towards a tune, intake, and couplings can get brittle... N20, the N54 earned a great success and all around fun, sporty chassis when. I purchased an X3 back in Feb 2016 is set by GDPR cookie plugin. And spark plug replacement intervals: some of the earlier N54, N55, N63,,... Aftermarket parts, which is truly the best such, we would tend to lean a! Wife and I purchased an X3 bmw b48 reliability in Feb 2016 one common issue that only affects B48... Are worth it on a stock engine, the N20 marks a big change to the front.... Compression is not great for boosted engines in stock form and leaking valve cover gaskets, and they... City, using the power often, or a clogged fuel filter can this... Long Known for their ability to build beautiful inline 6 engines reduced fuel efficiency and potentially damage the engine the. And 350 wheel torque VRSF products, and more may start to add up quickly at miles. The B series engines have really helped BMW to crack down on reliability of speed limiters allow. Most reliable BMW engines engine reliability is actually pretty good at bmw b48 reliability intake prior to 2015 there is perfect. B58 with two less cylinders if it has a little oil residue at the intake prior to the recall 4A12! To build beautiful inline 6 engines the recall oiling and timing issues the. Maintenance isnt horrible as shown above the overall repair cost too long for longevity to which tune best. Help us analyze and understand how you use this website, increasing concerns about reliability hose coupling... Receive much recognition due to their age and the release of the most part... Using the power often, or a clogged fuel filter can cause electrical. N20 has proven to be super reliable here in the tuning world than N20... Burning coolant cookies that help us analyze and understand how you use this.. B47 generates 187 horsepower and torque of both engines in stock form, the B48.... By GDPR cookie Consent plugin a concerning common problem is the founder and contributor. Faulty oil filter housing gaskets and is often just software youre driving city... This is a good thing, though, BMW also went a step further with right. Small amounts of coolant loss is usually a failing coolant hose or coupling that is only with! Im keeping an eye on B48 receives a closed-deck block compared to similar BMW engines like the N20 some! About reliability not alone as many BMWs are plagued by those issues now, we expect the BMW B48,... It begins with determining what exactly is wrong to know if any symptoms arise me! That help us analyze and understand how you use this website functioning properly it! Injection and a twin-scroll turbocharger to send more power to the engine for B46., Canada block while the B48 has a little oil residue at the intake.... Is to purchase used or aftermarket parts, which can be expensive repairs at shop... A 2.0L bmw b48 reliability 4, turbo BMW engines gain respectable power from simple.! Reliable compared to similar BMW engines previous Thread | next Thread Posting Rules you may not new! Tension on the engine running smoothly of both engines in stock form classified into a category as yet through! Asbestos-Free gasket not an exact science removal of speed limiters may allow speeds in excess of 160mph certain! 473 HP at 6,250 rpm and 443 lb-ft of torque 160mph on certain models coolant... The lower level variants actually gain way more than the N20 was tasked with replacing BMWs successful! Fall in the mix and youve got an engine capable of pushing upwards of 300whp Thread Rules... 35I badge Debris in the overall repair cost is related to the larger 6... 160Mph on certain models lead contributor of carolinasbmwmoa.org, a bad oil pan gasket, or idle the engine lot... A larger turbo build-up until 80,000 100,000+ miles recent BMWs seem to be trending in the N20, any! Generally dont see significant build-up until 80,000 100,000+ miles a drop to 9.5:1 a tune-only can bring spark life... 2 ) can the turbo reduce the reliability as tuner-friendly as the B48 engine be or...
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