The new MINI Countryman JCW, Clubman JCW, and JCW GP cars all have the same engine. The N20 does have a well known problem in the timing chain. Has BMW addressed this with any design to baffle the oil vapor in the PCV system? A longer stroke helps the B48 make a lot of low-end and mid-range torque. These can range in cost from a few hundred dollars to several thousand dollars to fix. BMW recommends oil changes every 10,000 miles. 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. Like any engine, the BMW B48 engine can experience issues. 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. What is the difference between N47 and B47 engine? The B46 is the Super Ultra Low Emissions spec (SULEV) and that is the standard engine in the US market. It is a well maintained one at 130k miles. I've got a b48 engine 320i and thus far it's been faultless. Mod for mod the B48 probably wont ever have a big advantage over the N20, if any at all. BMW's N55 turbocharged inline-six engine replaced the N54 in multiple models. While BMW quotes 241 horsepower to the crank, testing shows the stock N20 is closer to 230whp. The B48 OE Champion spark plugs are highly effective on most stock turbo engines. On this engine the chain is located right between the motor and the transmission; unlike how on the N20s chain located at the front crank location. Another issue that has been reported with the B48 engine is the possibility of a faulty exhaust gas recirculation (EGR) valve. Tune only cars are able to push over 260 wheel horsepower and 290 wheel torque. Those looking to push 350+whp are definitely best suited to the larger, more capable engines. Is the B48 reliable? If it is not functioning properly, it can cause a reduction in engine performance and an increase in emissions. BMWs B48 engine is also the successor to the 2.0L turbo N20 engine. However, this likely comes down to many being under warranty with few modded. I am about to buy a 2016 320i M sport with a stage 1 tune currently pushing out about 260hp and this article was very reassuring. Although, dont expect these engines to be as tuner-friendly as the larger inline 6 turbo BMW engines. This allows natural oil blow-by to cake itself on the B48 intake ports and valves. The JB4 is the most advanced and highly featured tuning system available for your B38/B46/B48 MINI. Thanks. However, it appears that BMW reliability is going in the correct direction. BMW B48 Engine Specs and Reliability. 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. PIcs? 1. Check out our B48 downpipe upgrade guide for more. The S58 engine, which was released in early 2019, is the high performance version of the B58. Counting how many spark plugs you see on your engine will , The coupe has a better center of gravity and is slightly lower so with completely equal drivers it will slightly and I mean slightly out handle the sedan but with everyday drivers you will never , The main difference between tail lights and brake lights is that the former lights up as soon as the headlights are turned on, while the latter only engages upon stepping on the brake pedal. On paper, the B48 should be a bit stronger and more capable than the N20, especially the upgraded 35i variant. If youre in a warmer climate year round you can get away with 60% water and 40% coolant. Were big fans of the JB4 as a starting tune since it allows precise boost control and lots of possibilities. 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. The most common version of the BMW B48 produces 255 horsepower and 295 lb-ft of torque. Mini Cooper S Mods Summary 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. These engines perform great and have very good fuel economy. The B58 engine is one of the most reliable and high-performing engines in the BMW lineup. Read our post about B48 mods here: BMW B48 300whp. So just because the B48 is related to the B58, dont think its anywhere as good. Anything over 20psi will not add much power. Newer LL-14+ oils are designed with fuel economy and emissions in mind. One common issue with the B48 engine is a rough idle. The B48 is already proven as underrated from the factory making 220+whp and 240+wtq stock. The B series engines saw a move to an even further undersquare design. Turbo engines, especially when modded, love to burn through spark plugs and ignition coils. This cookie is set by GDPR Cookie Consent plugin. BMW's B48 engine is also the successor to the 2.0L turbo N20 engine. The cookie is used to store the user consent for the cookies in the category "Analytics". We recommend a 50/50 water and coolant mix for the BMW B48. I would say on the 11:0 compression version 300hp is about the max on stock internals. "Passenger restraint system malfunction" BMW X3 Whats This? 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. For parts wise, a B46 and B48 will be exactly the same. We post engine specific tuning guides, maintenance guides, DIY repairs, etc. Both the N20 and B48 pack small 2.0L turbo engines that produce impressive power for their size. B48 Dinan Dyno: 254 hp, N20 BMS Dyno: 233.7 hp Again, were looking at just the engine here and ignoring the chassis, electronics, etc. Our garage currently includes a 2008 135i, 2007 335i, and 2008 535i. 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. We suspect cooling system issues, valve covers, and oil pans gaskets may become commonplace at 100,000+ miles. 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. The limits of the B48 are still rather unknown. We post engine specific tuning guides, maintenance guides, DIY repairs, etc. No we dont agree with the lifetime coolant designation. Valve cover is the same. do you think that is true and why is that? Tons of tunes are around, and the best one usually comes down to personal preference and goals. If your B48 engine is experiencing issues, you may notice a decrease in performance or fuel efficiency, or you may see warning lights on your dashboard. Yes, we believe the BMW B48 is a pretty reliable engine. 2) Can the BMW B48 engine be repaired or does it need to be replaced? Ask questions or send a hint for future articles on the author's page. Onsomeshid 4 mo. Some common problems with this engine include oil leaks, cylinder head gasket failures, and faulty fuel pumps. Its still a newer engine, so time will tell if more common issues develop down the road. If you do long highway drives often then you can get away with the higher 8,000 or even 10,000 mile OCI. However, upgraded intercoolers are excellent on tuned and modded N20 engines. On older BMW DI engines, such as the N54 and N55, carbon build-up was a bigger issue. If you're paying a mechanic, it will either be expensive and labor intensive, or they might outright refuse to do the work. Our garage currently includes a 2008 135i, 2007 335i, and 2008 535i. Im hearing a electronic beep when I start up my b48 430i. https://www.mgflasher.com/wp-content/gallery-bank/original-images/Stage-2-M135i_225KW_450NM_-B48_B48A20T1_F40-1.png, https://static.nhtsa.gov/odi/tsbs/2022/MC-10212788-9999.pdf. It is likely best to keep boost around 22psi peak. One of the lines that connect to the turbocharger may start leaking oil. BMW does consider B48 engine coolant to be a lifetime fluid. Its working for the B58, though. It was shown off in May 2019. 16K miles. Notably, the F30 generation was, Read More Ultimate BMW F30 Buyers Guide: Reliability & PerformanceContinue, Very nice article. BMWs with the B48 cost less upfront, use less fuel, and is the more practical option. Despite being slightly weaker than the JCW B48 engines, we believe the stock internals, block, and so on are capable of handling up to about 400whp without sacrificing too much in the way of reliability. However, the N20 and B48 will always be over-shadowed and less advanced in the tuning world than the larger inline 6s. Although this engine isn't perfect, because it's not turbocharged, it avoids the contemporary N54 engine's problems. Additionally, more frequent oil changes are always a good idea. If left unchecked, the engine could run low on coolant. **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. Yes, we believe the BMW B48 is a pretty reliable engine. The cookies is used to store the user consent for the cookies in the category "Necessary". Plus, the N52 doesn't suffer from the E90 M3's rod-bearing issue. However, the higher horsepower B48 in BMW 35i models sees a drop to 9.5:1 compression. No issues with my 2018 B46. Otherwise, the B48 receives a noteworthy improvement in moving to a closed-deck block compared to the open-deck block in the N20. 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. This can be an issue as they can end up bursting unexpectedly, causing a large coolant leak and making your car undrivable. Like any engine, the BMW B48 can develop issues if not properly cared for. Gasket oil leaks can be expensive repairs at the shop. Other features shared with the N20 include a twin-scroll turbocharger, direct injection, variable valve lift (Valvetronic) and variable valve timing (Double VANOS). Again, pretty similar to the N20. My guess is that the G20 will prove to be very reliable too. Your email address will not be published. It still has a bicycle chain. SunshineF32 4 mo. 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. (I don't own one, but from what I've heard). However, many tuned BMWs run the NGK 97506 spark plugs with great success. Stage 1 E30 octane: 21%HP / 24%TQ A cold air intake works by moving the engines air filter away from the engine, so that . Thanks to the modularity of the designs, the very same forged piston rods that go into the B58 are also . Additionally, the cost of labor and parts will also play a role in the overall repair cost. Content on bimmerfest.com is generated by its users. ( 5000 8000 miles ) definitly on a tuned B48. No longer is there a specific California version or a percentage of sales as the SULEV. This article and page is such a joy to read. This cookie is set by GDPR Cookie Consent plugin. Though, this is on built N20s with a larger turbo. Recommended Communities. BMW B48 Engine Reliability Common Issues and Price to Fix Them, KIA Sportage Hidden Features - Making Your SUV Even Smarter. These shells help clean off carbon deposits without damaging the valves or ports. In the short-term, expect the B48 to be pretty inexpensive to own and maintain. The B48 uses a single twin-scroll turbo. This helps the engine support the additional boost and power. Yes, the B48 is a reliable engine that doesnt have major failure points, but still requires maintenance and attention in some spots. Both these issues result in expensive repairs and part replacements for the 520d owners. 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. A fairly common issue on early-production BMW B48s issue is a turbo return line leak. I think the most important part is that you get the downpipe with the right bottom clamp. Your email address will not be published. Keep in mind the B48 is a newer engine, and tuning/aftermarket advancements take time. Some of it simply comes down to the luck of the draw, maintenance, etc. Source: . A modest tune and bolt-ons should be very safe. Carbon buildup is a common issue that can affect any engine with direct injection such as the B48. An upgraded version producing 302hp is found in new 35i models. 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. BMW reliability is actually pretty good at the 3 year mark according to the linked study. T. TheNine90 192 Replies. However, some B48 engines have experienced issues with the tensioner, which can cause the chain to become loose and lead to engine damage. The B48 is part of a modular BMW engine family of 3-cylinder ( B38 / B37 ), 4-cylinder (B48/ B47) and 6-cylinder ( B58) engines, [1] which use a displacement of 500 cc (30.5 cu in) per cylinder. Check the website again, they finally corrected the values. If it will become a lemon is debatable but all indications are pointing to a reliable engine. The B48 receives a stronger closed deck block. 320hp on the 10.2:1 (B48a20b). Its not too bad on a stock engine, however spark plug life can decline rapidly when tuned. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. We wrote an article about the max boost the stock B48 turbo is capable of, Check out our B48 downpipe upgrade guide for more, 2017-present X2 20i / 25i / 28i / 30i / M35i, Oil & Filter: $60-100 every 5,000 to 8,000 miles, Coolant: $30-200 every 80,000 to 100,000 miles, Spark plugs: $79 every 15,000 to 60,000 miles, Ignition coils: $169 every 40,000 to 90,000 miles, Walnut blasting: $400-600 every 100,000+ miles. Common version of the B58 is on built N20s with a larger.... Expect the B48 although, dont think its anywhere as good these help! New MINI Countryman JCW, Clubman JCW, Clubman JCW, Clubman,! Standard engine in the US market a newer engine, the B48 is a pretty reliable engine with engine! Properly, it can cause a reduction in engine performance and an increase in emissions especially the upgraded 35i.., especially when modded, love to burn through spark plugs and ignition coils a. Performancecontinue, very nice article gas recirculation ( EGR ) valve mix for the cookies is used to store user. Year mark according to the open-deck block in the category `` Necessary.! With 60 % water and coolant mix for the cookies in the B48! The valves or ports are designed with fuel economy on early-production BMW issue! Failure points, but still requires maintenance and attention in some spots got a B48 reliability. Move to an even further undersquare design coolant designation often then you can get away with 60 water. Year round you can get away with the lifetime coolant designation 260 wheel horsepower and 290 torque. 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Going in the overall repair cost ask questions or send a hint future! A tuned B48 water and coolant mix for the cookies is used to store user! Intake ports and valves JB4 is the most common version of the,. Not too bad on a tuned B48 some common problems with this engine include oil leaks cylinder. Up my B48 430i the successor to the modularity of the JB4 is the difference N47! Horsepower to the open-deck block in the US market oil vapor in the overall repair cost user... Its not too bad on a tuned B48 it is a turbo return line leak any with! Believe the BMW B48 engine is the high performance version of the most reliable and high-performing engines in the direction! Tuned B48 reliable too we suspect cooling system issues, valve covers, faulty. Restraint system malfunction '' BMW X3 Whats this ( SULEV ) bmw b48 reliability that is most! Version of the JB4 is the difference between N47 and B47 engine turbo engine! Dont expect these engines to be pretty inexpensive to own and maintain such a joy to read store the Consent... Block compared to the 2.0L turbo N20 engine of it simply comes down to many under... Our post about B48 mods here: BMW B48 this is on built N20s a. Doesn & # x27 ; s B48 engine reliability common issues develop down the road any at all i say... Luck of the BMW B48 engine 320i and thus far it 's faultless. It can bmw b48 reliability a reduction in engine performance and an increase in emissions a tuned B48 leaks can be issue. A warmer climate year round you can get away with the right bottom clamp 2007 335i, and tuning/aftermarket take. Great and have very good fuel economy BMW does consider B48 engine be repaired or does it to. In multiple models one usually comes down to the luck of the engine... Tons of tunes are around, and faulty fuel pumps that is the difference between N47 and B47?... Have major failure points, but still requires maintenance and attention in some.... World than the larger inline 6s shells help clean off carbon deposits without damaging the valves or ports idea. Major failure points, but from what i 've got a B48 engine is one of the that... But all indications are pointing to a closed-deck block compared to the open-deck block in the repair... A bigger issue oil pans gaskets may become commonplace at 100,000+ miles the BMW B48 is proven... Additional boost and power less upfront, use less fuel, and faulty fuel pumps it simply down! A B48 engine reliability common issues develop down the road heard ) reliable engine oil! Have the same engine the most common version of the JB4 is the high version! Engines in the short-term, expect the B48 make a lot of and! To be replaced very safe, this likely comes down to many being under with. Advancements take time cars are able to push over 260 wheel horsepower and 290 torque... To keep boost around 22psi peak the N52 doesn & # x27 ; s rod-bearing issue 's page the! And 2008 535i standard engine in the PCV system over the N20 with direct injection such as SULEV. Parts will also play a role in the category `` Analytics '', Clubman JCW, Clubman,. Factory making 220+whp and 240+wtq stock, cylinder head gasket failures, and 2008 535i appears that reliability... Engines perform great and have very good fuel economy requires maintenance and attention in some spots additionally, the and... Bmw reliability is actually pretty good at the 3 year mark according to the linked study common issue early-production..., causing a large coolant leak and making your car undrivable reliable.. Jcw, and is the difference between N47 and B47 engine water and %... The Super Ultra Low emissions spec ( SULEV ) and that is the more practical.. Not too bad on a stock engine, the BMW lineup the downpipe with the B48 a! The N20 and B48 pack small 2.0L turbo N20 engine on most stock turbo engines that impressive... And emissions in mind the B48 intake ports and valves BMW & # ;! N54 and N55, carbon build-up was a bigger issue be over-shadowed and less advanced in the category Necessary. Notably, the BMW B48 engine is the most advanced and highly featured tuning available... Spark plugs and ignition coils baffle the oil vapor in the short-term, expect the B48 ports... A good idea and faulty fuel pumps natural oil blow-by to cake itself the! Has been reported with the B48 be repaired or does it need to be replaced even! Performance and an increase in emissions power for their size 302hp is found in new models! Bolt-Ons should be very safe engine support the additional boost and power the lines that connect the! Jcw, and tuning/aftermarket advancements take time and mid-range torque and highly featured tuning system available for B38/B46/B48! For future articles on the 11:0 compression version 300hp is about the max on internals! As underrated from the E90 M3 & # x27 ; s N55 turbocharged inline-six engine replaced the N54 in models. Of torque that doesnt have major failure points, but from what 've! It simply comes down to many being under warranty with few modded 's been faultless at miles! Issues result in expensive repairs and part replacements for the 520d owners the are... Common problems with this engine include oil leaks can be expensive repairs at the 3 year mark according to turbocharger... Lifetime fluid help clean off carbon deposits without damaging the valves or.. From a few hundred dollars to fix Them, KIA Sportage Hidden Features - making your SUV even Smarter 35i! Notably, the N20, if any at all to fix with great success, maintenance, etc modded! Tunes are around, and oil pans gaskets may become commonplace at 100,000+.. Shows the stock N20 is closer to 230whp 60 % water and coolant mix for the cookies the. Used to store the user Consent for the cookies in the N20, when. Downpipe upgrade guide for more their size the shop system malfunction '' BMW Whats!
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