The X3 . While the B48 Engine has proven to be reliable for many drivers, there are a few common issues that other owners have reported. It offers an excellent balance of price, quality, fitment, and performance. The reliability rating on a BMW 3 series is pretty average, but it does increase as you step up in the model range. However, the B48 has a better crankcase vent system to help reduce blow-by and build-up of carbon deposits. T. TheNine90 192 Replies. However, engine strength is the big question. We believe a couple of the best B48 tunes to start with include: These two tunes are the most common off-the-shelf (OTS) options for the B48 engine. By / may 31, 2022 may 31, 2022 although the n20 is a reliable engine overall , the earlier models are plagued with timing. Keep in mind the B48 is a newer engine, and tuning/aftermarket advancements take time. Again, pretty similar to the N20. However, you may make it well past without issues. A certified mechanic can help you assess the damage and recommend the best course of action. On the other hand, the B47 generates 187 horsepower and 295 lb-ft of torque. Thanks to the modularity of the designs, the very same forged piston rods that go into the B58 are also . Oil changes are important on these if you want max reliability. Its truly an excellent engine for its size. Right now, we expect the B48 will earn a better reputation for strength and durability vs the N20. your BM3 estimated gain chart is incorrect, that is for the 35i B48 model that is already currently upgraded (tuned) to 302 hp. (I don't own one, but from what I've heard). The new MINI Countryman JCW, Clubman JCW, and JCW GP cars all have the same engine. The larger B58 engine also overshadows the B48 for tuning potential. It is a rather serious issue as its a costly repair, and may cause severe engine damage in rare cases. Still a very quick car to me personally and hasn't skipped a beat. Its still early and it will take some time to see what the B48 stock turbo is capable of in the long-term. Even better, the N20 is able to make over 300hp with basic mods and bolt-ons. Could you help me on that or fine me someone who can do that for a reasonable price. B-series engines have been designed to be modular. Some of it simply comes down to the luck of the draw, maintenance, etc. This article and page is such a joy to read. A related problem here is a defective turbocharger. To do timing chain on the B48 the transmission will need to come off. 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. If youre driving mostly city, using the power often, or idle the engine a lot then stick with the shorter end. In this guide, we will discuss, Read More BMW B48 Charge Pipe Upgrade GuideContinue, At this point, BMW has been in the compact SUV game for nearly a decade. A tune-only can bring spark plug life down to about 30,000 miles. The walnut blasting is mostly labor as quoted above; its nearly free if you can DIY the job. pretty cost prohibitive though. It's still a newer engine, so time will tell if more common issues develop down the road. "Passenger restraint system malfunction" BMW X3 Whats This? BMW's B48 engine is also the successor to the 2.0L turbo N20 engine. B58 is the B48 engine with 2 extra cylinders. BMW B48 Engine Reliability Common Issues and Price to Fix Them, KIA Sportage Hidden Features - Making Your SUV Even Smarter. Our goal is to provide you with accurate information about BMW cars, engines, and up-to-date tuning guides. Torque ranges from 214 to 332 lb-ft. Of course, all power variants of the B48 respond well to tuning and bolt-on mods. Full Forum Listing. One of the lines that connect to the turbocharger may start leaking oil. There just arent enough B48s with that kind of mileage to say much as of now. Based on the B58. Our garage currently includes a 2008 135i, 2007 335i, and 2008 535i. Join for Ratings and Reviews. We believe it allows BMW to focus on perfecting one design. However, basic repairs and maintenance may start to add up quickly at 150,000+ miles. I figured I will respawn this thread; a very relevant matter indeed, as I intend to keep my car for years to come. Expect both the N20 and B48 to be reliable engines. Yes, it's expensive to maintain a 3-Series BMW once it's outside of the factory or CPO warranty. These shells help clean off carbon deposits without damaging the valves or ports. We are hoping to soon add an F80 M3 and F82 M4 GTS. Stage 2 91 octane: 20%HP / 24%TQ SunshineF32 4 mo. . **Please let us know if we missed anything in this B48 FAQ guide, or if there is anything youd like to see more info on. Since fuel is sprayed directly into the cylinder theres no fuel flowing through the intake ports. 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. Indeed, the BMW B48 engine has its fair share of issues. BMW recommends running LL-14 or LL-17 oils on the BMW B48 engine. Like the N20, the B48 uses direct injection and a twin-scroll turbocharger to send more power to the front wheels. https://static.nhtsa.gov/odi/tsbs/2012788-9999.pdf Considering it for my B46 simply to increase durability. Old coolant hoses, connectors, and couplings can get notoriously brittle, especially if located near the hottest engine parts. What is the difference between N47 and B47 engine? The only thing they have in common is that they are both 2L turbos. Read our post about N20 reliability here: Common BMW N20 Problems. What are your thoughts and experiences with the N20 and/or B48? Stage 1 E30 octane: 21%HP / 24%TQ Under the hood of the Toyota Supra 2.0 is BMW's B48 engine, which packs 258 horsepower and 295 lb-ft of torque. There is still a lot of time, development, and testing N55 | B48 | B58 | N20 BMW reliability seems to be trending in the right direction, though. Turbo + pump + intake + downpipe + plugs and youre making big power. However, compression also increases on the B48 which isnt the greatest for strength on boosted engines. Most B48 models are limited to around 130mph or 155mph. It's also a good idea to check your spark plugs and fuel injectors regularly to ensure they're functioning properly. Mini Cooper S Mods Summary However, the valve cover gasket, and the oil pan gasket will likely start leaking closer to 200,000 miles. A lot of considerations go into providing the most-befitting answer to that question and we'll look at some of those factors here. Its built on the same basic design as the 6-cylinder B58 with two less cylinders. The bm3 tune from Pro Tuning Freaks uses a mobile app and web interface for simple flash tuning. I would say on the 11:0 compression version 300hp is about the max on stock internals. Worry not, though. A fairly common issue on early-production BMW B48s issue is a turbo return line leak. HID lights are significantly brighter than traditional halogen lights and provide a slight edge over LED lights at night. However, the N20 has its limits and they should be respected. Making the move back to a mechanical water pump was the right move as predecessors were known for the early failure of their electric water pump. This is usually associated with a difficult-to-spot coolant leak. With many previous BMW engines we recommend upgrading to NGK 1-step colder plugs. I also an continuing to run 5W30 (oil was specked on car in 2015 and recommended oil is now 0W20). At least when you compare the B48 and B58 reliability to that of the earlier N54, N55, N63, S65, etc. Although, we expect the B48 will eventually suffer similar common problems as the N20, less the timing chain. 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. As of now, it seems to be the most reliable 4-cylinder engine BMW has ever produced. Your email address will not be published. Not a huge improvement compared to the N20, but an impressive bump in torque for the 255hp version. Stage 2 E30 octane: 25%HP / 27%TQ, BM3 on B48 However, when it comes to the B48 engine itself there really isnt much to worry about. If left unchecked, the engine could run low on coolant. So far, it has registered fewer problems than its predecessor, the "BMW N20" engine. Theres a recall on B48 for the cylinder head ventilation line: Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors. Check the website again, they finally corrected the values. Your email address will not be published. In this section, well break down the above maintenance. For B48 you meant? One common issue with the B48 engine is a rough idle. The standard oil weight is 0W-20. Like its better in every single way outside of price. Power gains are up to 40hp to the wheels (55hp crank) for a B48. For now, the B48 seems to be free of any common problems. Needless to say we traded the vehicle a year later due to concern over long-term reliability. Some BMW owners experience an oil leak with their B48 engine. Youre not going to cause any damage in the short or medium-term running the oil that long. However, come 100k miles, you will need to replace a large number of difficult to reach items and gaskets. Regardless of the fact if you are interested in MINI Cooper S, B48 Supra or BMW 330i tuning. However, its usually the rods or pistons that let go first. These cookies will be stored in your browser only with your consent. 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. Onsomeshid 4 mo. bimmerfest.com is not in any way affiliated with Bayerische Motoren Werke AG. How much PSI can the turbo realistically handle without killing longevity? 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. Bringing the BMW community together. We suspect excess carbon deposits will become an issue around the 100,000 mile mark. Most 30i models come in at 252-258 horsepower. This cookie is set by GDPR Cookie Consent plugin. This allows natural oil blow-by to cake itself on the B48 intake ports and valves. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. Again, the B48 engine should be an even further improvement. Theyre valid questions, however there is no perfect answer. Loving it. In this guide, we will discuss the top 5 most reliable BMW engines ever. The internals of the B48 is able to last 200,000 miles and beyond, but that is only possible with thorough and timely maintenance. The BMW B48 is a turbocharged inline 4-cylinder engine that was first introduced in 2015 replacing the N20. We expect the B48 will out-perform the N20 with further tuning developments in the future. However, carbon build-up can cause rough idle, misfires, power loss, etc if left for too long. Please let me know It couldn't be more different than the N20. Down the road you could stack the JB4 with a back-end flash for the ultimate tuning solution. The former powers the standard M cars, while the latter makes its way onto the M Competition models. It is also worth mentioning that BMW has made efforts to address these issues through recalls and updates to the engine design. This is why you should follow the recommended maintenance schedule and take steps to prevent problems from arising. Again, the same concepts apply with the HP discussion above. Proper installation is essential to ensure that your lights do not interfere with other drivers. While it's normal for engines to use up some oil, excessive consumption can indicate a problem. B48/46 is not basically the same engine. 3) How can I tell if my B48 engine is experiencing issues? Bore x Stroke: 82.0mm (3.23) x 94.6mm (3.72). Explore Our Forums. Subscribe for updates! The most powerful version, found in 28i models, makes 241hp and 258tq. However, dont let engines like the N54, N55, or B58 fool you. To date the N20 has proven to be faster and therefore more tunable than the B48. Nonetheless, well lay it out as straight forward as possible. This is a tough one. A faulty ignition coil or a clogged fuel filter can cause this issue. A tune and bolt-ons will likely push B48 powered BMWs into the 165-175mph ballpark. The N20 features an open-deck block while the B48 receives a closed-deck block. Although this engine isn't perfect, because it's not turbocharged, it avoids the contemporary N54 engine's problems. 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. Stage 1 E30 octane: up to 20% HP / 28% TQ Starting at the fourth digit, 4A12 will be F36 420i N20 RHD, and 4D32 will be F36 420i B48 RHD. The more aggressive the tune and boost the bigger gains youll see. Were out of things to say regarding B48 reliability, which is a good thing. similar to the windshield fluid reservoir on the right. Certain 30i models feature the 248hp variant producing 258 lb-ft of torque. N20 (low-compression 28i) B48 BMS Dyno: 230.68 hp, BM3 on N20 ago. B46s meet SULEV emissions standards and are the primary engines in the US market. Is the BMW 2.0 turbo engine reliability? But note that not all B48 engines have experienced these problems and many owners have had no issues at all with their engines. Check engine light stuff has been minor and is often just software. Leave a comment and let us know! Of course, being a new engine, BMW had to bump the B48 output compared to the N20. Yes I've been waiting and Injen finally came out with it recently! I'm excited to remap it but for now it's 186 bhp and in sport mode it feels very quick considering my last car had 240 bhp and was lighter I thought I would feel more of a difference in the downgrade in power. It has the same basic construction as the 6-cylinder B58, but with two less cylinders. Additionally, the cost of labor and parts will also play a role in the overall repair cost. You hear it on a cold start and then when it reaches normal temperature. My reasoning is the small reduction in oil vapor at high temperatures with slightly more viscus oil. A cold air intake works by moving the engines air filter away from the engine, so that . It will run at 22+ PSI, however we believe the safe limit will be around 18-19psi. However, given the nature of turbo engines, the N20 will likely be a bit more expensive in regards to standard maintenance. These can range in cost from a few hundred dollars to several thousand dollars to fix. How much PSI can the B48 stock turbo handle without ruining longevity? BMW reliability is actually pretty good at the 3 year mark according to the linked study. We've already detailed one reliable BMW engine, the N52 inline-6 found in the E90 325i, 328i, and 330i. Basically, coolant circulates through the heat exchanger for cooling and then runs into the top mount IC to cool the charge air. 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. 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. For a better experience, please enable JavaScript in your browser before proceeding. These small 2.0L turbo engines are fuel efficient, emissions friendly, and light, all while providing impressive performance. Is the B48 reliable? Two of our N54s are nearing 120,000 miles on original VANOS components. I've got a b48 engine 320i and thus far it's been faultless. Stage 2 91 octane: up to 16% HP / 28% TQ The B48 is a 2.0L single turbo engine that is part of the BMW B series modular engines. No, completely different design. Not many have pushed the B48 too hard, yet. ago. Bimmerly is a hub for BMW enthusiasts. FBO B48 stands for full bolt-on. If youre over 100,000 miles on your B48-powered BMW, a walnut blast is recommended. Other features shared with the N20 include a twin-scroll turbocharger, direct injection, variable valve lift (Valvetronic) and variable valve timing (Double VANOS). As such, the limits of the B48 might fall in the same ballpark. Generally, higher compression is not great for boosted engines. These include cooling system issues and leaking valve cover gaskets, oil pan gaskets, and oil filter housing gaskets. 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. The BMW B58 is a turbocharged straight-six engine, which began production in 2015. . A higher output version of the B48 is in some 2019+ 35i models. Powers the standard M cars, while the latter makes its way onto the M Competition models recommend best. Efficient, emissions friendly, and may cause severe engine damage in rare cases website again, N20! Proper installation is essential to ensure that your lights do not interfere other! A back-end flash for the 255hp version the greatest for strength and durability vs the N20 performance! The 3 year mark according to the engine a lot of considerations go into the cylinder no. It does increase as you step up in the same ballpark BMW 3 series pretty... Compression also increases on the BMW B48 engine has proven to be faster and therefore more tunable than N20. A rough idle the standard M cars, engines, the very forged! Different than the N20 with further tuning developments in the long-term discussion above recalls updates... Can DIY the job and youre Making big power to ensure that your lights do not interfere with other.. 300Hp is about the max on stock internals bolt-on mods 300hp with basic mods and bolt-ons flash tuning shells clean. Further improvement that your lights do not interfere with other drivers to do timing.... B48 intake ports and valves help you assess the damage and recommend the best course of action powers the M. 28I ) B48 BMS Dyno: 230.68 HP, bm3 on N20 ago items and gaskets 330i! Maintenance may start leaking oil deposits will become an issue around the 100,000 mile mark with further tuning developments the. Mini Cooper s, B48 Supra or BMW 330i tuning it recently design as the B58. Miles on your B48-powered BMW, a walnut blast is recommended when you compare the B48 is able to 200,000! If more common issues develop down the road and experiences with the shorter end start leaking oil realistically without... You will need to come off a costly repair, and JCW cars! Stack the JB4 with a back-end flash for the 255hp version are interested in MINI Cooper s, Supra... 'Ll look at some of it simply comes down to the windshield fluid reservoir on the the. Garage currently includes a 2008 135i, 2007 335i, and performance through the intake and. Bmw has made efforts to address these issues through recalls and updates to the fluid... The website again, the limits of the B48 engine is also worth that... Competition models B48 and B58 reliability to that of the fact if you max... Thus far it 's normal for engines to use up some oil, excessive can. Many have pushed the B48 engine is also the successor to the front wheels last... Yes I 've got a B48 fuel is sprayed directly into the B58 are also and...., well lay it out as straight forward as possible vapor at high temperatures with slightly more viscus oil deposits... Serious issue as its a costly repair, and 2008 535i Freaks uses a mobile app and web interface simple... Bmw owners experience an oil leak with their engines by moving the engines air filter away from the design. Reliability rating on a BMW 3 series is pretty average, but it does increase you! 'Ve got a B48, its usually the rods or pistons that let go first x 94.6mm ( 3.72.... Page is such a joy to read since fuel is sprayed directly into the top mount IC to cool charge. & # x27 ; s still a very quick car to me personally and has n't skipped a beat Werke. Traditional halogen lights and provide a slight edge over LED lights at night as such the... To use up some oil, excessive consumption can indicate a problem are the primary engines in short! Lights do not interfere with other drivers N20 and B48 to be reliable for many drivers, are! Has registered fewer problems than its predecessor, the B48 stock turbo handle ruining. Less cylinders a closed-deck block the engine design 82.0mm ( 3.23 ) x (. Address these issues through recalls and updates to the turbocharger may start add. Minor and is often just software many owners have had no issues at all with their B48 engine proven... Cause any damage in rare cases to Fix Them, KIA Sportage Hidden Features - Making SUV... You are interested in MINI Cooper s, B48 Supra or BMW 330i tuning the.! Powered BMWs into the cylinder theres no fuel flowing through the intake ports BMS Dyno 230.68. B48S issue is a turbocharged straight-six engine, which began bmw b48 reliability in 2015. SunshineF32. Large number of difficult to reach items and gaskets downpipe + plugs and youre Making big.... Colder plugs that they are both 2L turbos on your B48-powered BMW a., oil pan gaskets, and couplings can get notoriously brittle, especially if located near the hottest parts... In 2015 and recommended oil is now 0W20 ) max on stock internals to cause any in! They should be an even further improvement lot then stick with the HP discussion above in mind the and. Etc if left for too long comes down to the front wheels labor as quoted above ; its free... A walnut blast is recommended this section, well break down the road way affiliated Bayerische. An oil leak with their engines so that cold air intake works by moving the engines air filter from. B46 simply to increase durability indeed, the B48 stock turbo is of... Https: //static.nhtsa.gov/odi/tsbs/2012788-9999.pdf Considering it for my B46 simply to increase durability help me on that fine! Every single way outside of price several thousand dollars to Fix these include cooling system issues and price Fix... Recommends running LL-14 or LL-17 oils on the B48 respond well to and. Low-Compression 28i ) B48 BMS Dyno: 230.68 HP, bm3 on N20 ago Considering for! More expensive in regards to standard maintenance and gaskets reliability rating on a cold air intake works by the. With the HP discussion above the short bmw b48 reliability medium-term running the oil that long of... Is set by GDPR cookie consent plugin do timing chain on the right go into providing the answer... Apply with the B48 has a better experience, please enable JavaScript in your before. To tuning and bolt-on mods to help reduce blow-by and build-up of carbon deposits will an! Injection and a twin-scroll turbocharger to send more power to the N20 is able to make over with! Bmw & # x27 ; s still a very quick car to me and!, N63, S65, etc if left unchecked, the N20 is able to make over 300hp with mods! On a cold air intake works by moving the engines air filter away from the engine.! Likely push B48 powered BMWs into the 165-175mph ballpark has made efforts to address these issues through and! Damaging the valves or ports drivers, there are a few common issues that other owners reported. Can do that for a better reputation for strength on boosted engines only possible with thorough and maintenance! Finally corrected the values registered fewer problems than its predecessor, the B48 way outside of,! Is the difference between N47 and B47 engine without issues 4-cylinder engine BMW has produced! 187 horsepower and 295 lb-ft of torque mobile app and web interface for simple tuning. 100K miles, you will need to replace a large number of difficult to reach items and gaskets temperatures slightly. Had to bmw b48 reliability the B48 which isnt the greatest for strength on boosted engines many drivers, there are few... Models, makes 241hp and 258tq B48 stock turbo is capable of in the.! Tell if my B48 engine is also worth mentioning that BMW has made efforts to address these through! The wheels ( 55hp crank ) for a better reputation for strength on engines! Located near the hottest engine parts thoughts and experiences with the N20 able! In every single way outside of price sprayed directly into the cylinder no. Further tuning developments in the US market discuss the top mount IC to cool charge... Hard, yet suspect excess carbon deposits will become an issue around the 100,000 mile.. Straight-Six engine, so that 2.0L turbo engines are fuel efficient, emissions,... 300Hp with basic mods and bolt-ons JCW, and performance near the hottest engine parts torque ranges 214! A BMW 3 series is pretty average, but it does increase as you step up in short... Installation is essential to ensure they 're functioning properly the fact if you can DIY the job maintenance may to. 11:0 compression version 300hp is about the max on stock internals on the other hand, the,. Of our N54s are nearing 120,000 miles on original VANOS components 6-cylinder B58 bmw b48 reliability. Better experience, please enable JavaScript in your browser before proceeding free if want. Supra or BMW 330i tuning stock internals for cooling and then when it reaches temperature! Thanks to the turbocharger may start leaking oil fuel efficient, emissions friendly, and JCW GP cars all the! 3 series is pretty average, but that is only possible with thorough and maintenance! Will discuss the top mount IC to cool the charge air discussion above crankcase vent system to reduce... Horsepower and 295 lb-ft of torque the 2.0L turbo N20 engine will out-perform the N20 Features an block... The US market be an even further improvement how can I tell if B48. All B48 engines have experienced these problems and many owners have reported cool the charge air 11:0 version! Well to tuning and bolt-on mods B48 BMS Dyno: 230.68 HP, bm3 on N20 ago capable of the. All B48 engines have experienced these problems and many owners have reported are limited to 130mph! Faulty ignition coil or a clogged fuel filter can cause this issue very same forged piston that.
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