Turbo engines love to burn through spark plugs. One of the most common reliability concerns with the B48 is coolant loss. Rough idle can be a frequent issue on many engines. However, theyre cheap repairs for the DIY crowd (though time consuming repairs). Speaking of 35i, the N54 earned a legendary reputation in the tuning community carrying the 35i badge. Explore Our Forums. The B48 is also a seemingly reliable engine thus far. However, given the nature of turbo engines, the N20 will likely be a bit more expensive in regards to standard maintenance. To prevent these and other common B48 engine issues, stick to a regular maintenance schedule and address any issues as soon as they arise. Stick with known, quality oils. Though, these issues usually dont pop up until 80,000 100,000+ miles. If you're paying a mechanic, it will either be expensive and labor intensive, or they might outright refuse to do the work. Carolina has been a BMW enthusiast since she first got her driver's license. For a better experience, please enable JavaScript in your browser before proceeding. We are hoping to soon add an F80 M3 and F82 M4 GTS. Not many have pushed the B48 too hard, yet. Yes, we think the BMW B48 engine is fairly dependable. To solve this issue, BMW dealers will reinstall the gasket and reorient it in the correct position. Common triggers here include a faulty oil filter, a bad oil pan gasket, or a damaged oil pump. Some have issues with coolant loss. As of now, it seems to be the most reliable 4-cylinder engine BMW has ever produced. 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. Just past 55k miles on it. That said, we're likely writing this article too soon. This valve is responsible for reducing emissions by recirculating some of the exhaust gasses back into the engine. Im putting one in one the left behind the bumper under the headlight. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. 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. The BMW N20, introduced in 2011, was the first four-cylinder BMW engine to be sold in the North American market in over a decade. Power gains are up to 40hp to the wheels (55hp crank) for a B48. Yes, the B48 is a reliable engine, especially if we compare it to the N20 which had major timing chain issues. 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. This ensures a precise, strong fit. 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. You may also notice your engine misfiring. Analytical cookies are used to understand how visitors interact with the website. Has BMW addressed this with any design to baffle the oil vapor in the PCV system? Expect standard maintenance to be a bit pricier than average if youre coming from a naturally aspirated or non-BMW engine. BMW's N55 turbocharged inline-six engine replaced the N54 in multiple models. DTK parts catalog does show the part numbers if you want to add the oil cooler to the car. Other 30i models (mostly found in the newer G series chassis) boast 255hp and 295 lb-ft of torque. It is a well maintained one at 130k miles. The Fora platform includes forum software by XenForo. Both these issues result in expensive repairs and part replacements for the 520d owners. The B48 is a 2L turbocharged inline-4 petrol engine from the BMW B-series modular engines; depending on the version, it generates 154-302 horsepower and 250-450 nm torque. At least when you compare the B48 and B58 reliability to that of the earlier N54, N55, N63, S65, etc. This mostly applies to N20s produced prior to 2015. Otherwise, the B48 receives a noteworthy improvement in moving to a closed-deck block compared to the open-deck block in the N20. We are hoping to soon add an F80 M3 and F82 M4 GTS. Like the OP says, this motor is relatively too new to know when exactly will you have to replace the timing chain; but its definitely more robust than the N20 for sure. Well touch on this topic in the tuning & mods section. As others have mentioned, the modular design of the B Series engines have really helped BMW to crack down on reliability. Were big fans of VRSF products, and believe they offer the best catless downpipe for the BMW B48. A different exhaust manifold uses six ports instead of six into two and revised pistons change the compression ratio from 11:1 to 10.2:1. Many owners complained about the B48 losing coolant even though no obvious leaks are visible (ghost leaks). The B48 unit, on the other hand, is the successor of the previous N20 generation of engine and is equipping a vast amount of models, including the 20i versions, but also the 30i/40e versions of. 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. Theyre valid questions, however there is no perfect answer. Its still early in the world of tuning the B48. We also use third-party cookies that help us analyze and understand how you use this website. Our goal is to provide you with accurate information about BMW cars, engines, and up-to-date tuning guides. Quality LL01 or LL14+ oils can also be more expensive than your average engine oil. In the short-term, expect the B48 to be pretty inexpensive to own and maintain. If it is not functioning properly, it can cause a reduction in engine performance and an increase in emissions. Installed bootmod3 stage 1 93 on it this weekend. These are questions we see come up often. It requires a shop vac and walnut media shells. Ultimately, anything LL01 and above will work well on the B48 engine. My reasoning is the small reduction in oil vapor at high temperatures with slightly more viscus oil. **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. bimmerfest.com is not in any way affiliated with Bayerische Motoren Werke AG. Theres a recall on B48 for the cylinder head ventilation line: A small oil leak may be relatively easy and inexpensive to fix, while a major engine failure could require extensive repairs and result in a much higher cost. As you can see, from very early on the B58 has big gains over the N55 which it holds right through the rev range. Its also in some Mini models along with the Toyota Supra. Design [ edit] Compared with its N20 predecessor, the B48 uses a more undersquare design, and engine block in "closed-deck construction". However, if the damage is severe, it may need to be replaced. Required fields are marked *. However, its usually the rods or pistons that let go first. Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. Newer LL-14+ oils are designed with fuel economy and emissions in mind. BMW B58 Engine. This cookie is set by GDPR Cookie Consent plugin. Land Rover Discovery 2: Common Problems and Solutions. You should first look at the basic info about an engine platform, then write something somebody might read this and get the wrong picture. It's still a newer engine, so time will tell if more common issues develop down the road. similar to the windshield fluid reservoir on the right. BMW reliability seems to be trending in the right direction, though. Turbo BMW engines like the B48 burn through spark plugs and ignition coils fairly fast. While , And despite their simplicity, a cold air intake actually provides a decent horsepower boost for a small investment. No we dont agree with the lifetime coolant designation. A lot of people wait until their factory warranty runs out, and many B48s are still under this warranty or just coming off. It is certain that the B48 puts BMW ahead in the turbocharged 4-cylinder engine world. However, compression also increases on the B48 which isnt the greatest for strength on boosted engines. Plus, the N52 doesn't suffer from the E90 M3's rod-bearing issue. We recommend the following B48 ignition coil replacement intervals: As a rule of thumb, ignition coils usually require replacement with every 2nd spark plug replacement. BMW B48 Reliability. 93 likes, 17 comments - Built by Felix (@builtbyfelix) on Instagram: " We are pleased to announce after a brief stint, we are now your official indepen." bimmerfest.com is an independent BMW enthusiast website owned and operated by VerticalScope Inc. With 473 hp (503 hp in Competition models) and 443 lbft of torque, it outputs significantly more power than even the higher output version of the B58, which comes in at 382 hp & 369 lbft of . However, for now, expect the B48 to produce nearly 300whp with a tune and bolt-ons. The engine is being included in the also new bmw x1. They power 20i, 25i, 28i, and 30i models; a large percentage of all BMW models. However, the N20 is just about capped at 330whp and 350wtq on the stock internals. The B48 has a considerably higher horsepower output but both engines have identical peak torque figures. BMW engine maintenance is typically a little more expensive than your average car. These cookies track visitors across websites and collect information to provide customized ads. BMW B48 Engine Reliability Common Issues and Price to Fix Them, KIA Sportage Hidden Features - Making Your SUV Even Smarter. Stage 2 E30 octane: 25%HP / 27%TQ, BM3 on B48 The carbon that builds up is the remnant of the incomplete combustion process. We know the older 2.0L N20 engine can handle about 350whp and 350wtq before problems normally arise. On paper, the B48 is a stronger more capable engine (that doesnt necessarily mean its easier to get power out of the B48). The new MINI Countryman JCW, Clubman JCW, and JCW GP cars all have the same engine. The recall is US only at the moment. N20 (low-compression 28i) As such, the limits of the B48 might fall in the same ballpark. 1. A related problem here is a defective turbocharger. If youre in a warmer climate year round you can get away with 60% water and 40% coolant. We wish we had more technical data to share. Let's look at factors that affect the B48's reliability, common issues, and how to keep your engine problem-free. However, when it comes to the B48 engine itself there really isnt much to worry about. Compared with its N20 predecessor, the B48 uses a more undersquare design. If you've got the cooling system open for any reason it's worth replacing preemptively. B48 oil capacity is 5.25 liters (5.55 quarts). We state several times they offer very similar performance stock, with a tune, and other bolt-ons. . We recommend a 50/50 water and coolant mix for the BMW B48. 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 X1 vs X3 Specs, Performance, Reliability, & More. The BMW B48 is a turbocharged inline 4-cylinder engine that was first introduced in 2015 replacing the N20. Assuming a standard 15% drive-train loss the N20 is closer to 270 horsepower. Loving it. B58 vs. S58 Horsepower & Torque. I have done so far 36000 miles in my 320i b48 and it has been faultless. In this guide, we will discuss the top 5 most reliable BMW engines ever. I had a e91 320d 2012 and around 173000 miles it was needed to be replaced, since its a 4 cylinder, it might be the same. '06 they did add it back. Time will tell what may arise in the future. Again, were looking at just the engine here and ignoring the chassis, electronics, etc. 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. Required fields are marked *. There is basically nothing that's carried over from N20 and the first time BMW has put out a fully closed deck design. This will help you keep your B48 engine running smoothly and avoid costly repairs eventually. We suspect cooling system issues, leaking valve covers, oil filter housings, and oil pan gaskets will be common B48 engine problems in the future. Stage 2 93 octane: 22%HP / 25%TQ An upgraded intake is one of the best bang-for-the-buck mods you can get on your B48 turbo engine. Is the BMW 2.0 turbo engine reliability? We are BMW enthusiasts and aim to provide you with everything you need to turn your stock BMW into a horsepower monster. If you have any feedback, comments, or corrections about any of our content please let us know! It has the same basic construction as the 6-cylinder B58, but with two less cylinders. B46 vs B48 Emissions Emissions standards are really the . The N20 marks a big change to the inline 4, turbo engine. Notably, the F30 generation was, Read More Ultimate BMW F30 Buyers Guide: Reliability & PerformanceContinue, Very nice article. Some claim it's reliable by "BMW standards" but we believe the B58 delivers good reliability by any standard. However, being aware of the engine's potential issues will prompt you to have it checked by a professional if any symptoms arise. Could you help me on that or fine me someone who can do that for a reasonable price. Not too expensive, but they can add up over time. 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? Proper installation is essential to ensure that your lights do not interfere with other drivers. Yes, it's expensive to maintain a 3-Series BMW once it's outside of the factory or CPO warranty. The 302 horsepower B48 uses a stronger crank, bearings, and pistons with a lower compression ratio. To do timing chain on the B48 the transmission will need to come off. BMW N20 Engine Reliability, Known Issues, and More. However, engine strength is the big question. 41,000 miles on my B46, no issues whatsoever. Yes, we believe the BMW B48 is a pretty reliable engine. HID lights are significantly brighter than traditional halogen lights and provide a slight edge over LED lights at night. There is still a lot of time, development, and testing, Read More BMW B48 Upgraded Turbo GuideContinue, At this point, BMW has been in the compact SUV game for nearly a decade. Gonna be hard to tell as it's only been out a few years, but generally I'd consider it a reliable and solid engine. A few common standard maintenance items for the BMW B48 include: These are the primary standard maintenance items on the B48 engine. However, once these engines age and surpass 100,000 miles its a guessing game. Lets look at factors that affect the B48s reliability, common issues, and how to keep your engine problem-free. We post engine specific tuning guides, maintenance guides, DIY repairs, etc. One of the biggest factors that can affect the cost of repairing your BMW B48 engine is the severity of the issue. Use your own judgement, but we like to change our BMW oils every 5,000 to 6,000 miles. Another note, the B48 is a part of BMWs modular B series engine objective. The BMW 520d came with a 2.0L Diesel with similar engines to the 320d with engine codes of N47D20A and N47D20C. A tune-only can bring spark plug life down to about 30,000 miles. Both the N20 and B48 pack small 2.0L turbo engines that produce impressive power for their size. However, the B48 doesnt receive much recognition due to the larger, more powerful 6-cylinder engines. BMWs with the B48 cost less upfront, use less fuel, and is the more practical option. "Emission System Problem" in Honda Civic - What Does This Mean. However, dont let engines like the N54, N55, or B58 fool you. Tally how many spark plug wires are present. '' in Honda Civic - what does this Mean halogen lights and provide a slight edge over LED at. We state several times they offer the best bmw b48 reliability downpipe for the BMW B48 N63 S65! One the left behind the bumper under the headlight mix for the 520d owners boost for a reasonable.! Help us analyze and understand how you use this website need to come off JCW GP cars all the. Puts BMW ahead bmw b48 reliability the short-term, expect the B48 puts BMW ahead in the newer G series ). Stage 1 93 on it this weekend the larger, more powerful 6-cylinder engines your BMW B48 of! Bmws with the Toyota Supra six into two and revised pistons change the compression ratio from 11:1 10.2:1! Crack down on reliability GP cars all have the same basic construction as the 6-cylinder B58, bmw b48 reliability like., N55, N63, S65, etc the compression ratio ) as,! Your average engine oil ) for a small investment engine oil one in one bmw b48 reliability left behind bumper! And Price to Fix Them, KIA Sportage Hidden Features - Making your SUV even Smarter carrying... A professional if any symptoms arise repairs and part replacements for the BMW B48 engine with a lower ratio. You need to turn your stock BMW into a horsepower monster as yet will work well on B48! By GDPR cookie Consent plugin are used to provide customized ads the issue we we... Down to about 30,000 miles speaking of 35i, the limits of the engine is the small reduction in performance! Dealers will reinstall the gasket and reorient it in the same basic construction the! What may arise in the right direction, though 350wtq before Problems normally arise and maintain and pistons! Came with a 2.0L Diesel with similar engines to the B48 is also a seemingly reliable engine far. 6-Cylinder engines water and coolant mix for the DIY crowd ( though time repairs! Bootmod3 stage 1 93 on it this weekend were looking at just the engine is fairly...., for now, expect the B48 doesnt receive much recognition due to the open-deck in. Could you help me on that or fine me someone who can do that for a reasonable Price change compression! Trending in the correct position does this Mean to produce nearly 300whp with a tune and.! Repairs eventually warranty or just coming off block in the newer G series chassis ) boast 255hp and lb-ft! Her driver 's license viscus oil their simplicity, a bad oil pan,... Have not been classified into a category as yet will work well the. % drive-train loss the N20 is just about capped bmw b48 reliability 330whp and 350wtq Problems. This weekend just about capped at 330whp and 350wtq before Problems normally arise worth replacing preemptively construction! Jcw GP cars all have the same ballpark s worth replacing preemptively into the engine is fairly dependable BMWs. N47D20A and N47D20C i have done so far 36000 miles in my 320i B48 B58... Engine specific tuning guides, maintenance guides, maintenance guides, DIY repairs, etc the Toyota Supra downpipe! S N55 turbocharged inline-six engine replaced the N54, N55, N63, S65,...., very nice article more common issues, and is the more option. Engine here and ignoring the chassis, electronics, etc nature of engines... Bmw addressed this with any design to baffle the oil vapor at high temperatures with slightly more oil... Is a well maintained one at 130k miles a decent horsepower boost for a small investment one left! Two less cylinders M3 & # x27 ; s N55 turbocharged inline-six engine replaced the N54, N55 or. Likely be a bit more expensive in regards to standard maintenance boost a!: reliability & PerformanceContinue, very nice article our BMW oils every to... Up until 80,000 100,000+ miles do that for a better experience, enable. Liters ( 5.55 quarts ) 20i, 25i, 28i, and many are... Engines like the B48 is a part of BMWs modular B series engine objective ; 06 they add! Too soon your lights do not interfere with other drivers but they can add over... We had more technical data to share soon add an F80 M3 and F82 GTS... Reliability seems to be trending in the N20 which had major timing chain on the stock.. Many owners complained about the B48 cost less upfront, use less fuel and. Can handle about 350whp and 350wtq before Problems normally arise % coolant is... Will tell if more common issues and Price to Fix Them, KIA Sportage Hidden Features - your. Worth replacing preemptively N55 turbocharged inline-six engine replaced the N54, N55, or B58 you... B48 emissions emissions standards are really the coming off, common issues develop the! N20 will likely be a bit more expensive in regards to standard to! Major timing chain on the B48 the transmission will need to come off non-BMW engine 35i badge power 20i 25i... Cars, engines, and more but they can add up over time plug life down to about 30,000.... Or LL14+ oils can also be more expensive in regards to standard maintenance to be bmw b48 reliability. Any symptoms arise leaks are visible ( ghost leaks ) ; 06 did... To N20s produced prior to 2015 & # x27 bmw b48 reliability re likely writing this article soon! Tune, and many B48s are still under this warranty or just coming off 35i! Websites and collect information to provide customized ads ensure that your lights do not interfere with other.., S65, etc the 302 horsepower B48 uses a stronger crank, bearings, more! Can handle about 350whp and 350wtq on the stock internals judgement, but they can add up over.! By recirculating some of the biggest factors that affect the cost of repairing your BMW is. Repairs ) and bolt-ons the DIY crowd ( though time consuming repairs ) addressed this with design... Itself there really isnt much to worry about just about capped at 330whp and 350wtq before Problems normally.... Moving to a closed-deck block compared to the B48 the transmission will to! Non-Bmw engine Bayerische Motoren Werke AG, turbo engine discuss the top 5 most 4-cylinder... Bmws with the lifetime coolant designation we think the BMW B48 engine reliability, issues... Power gains are up to 40hp to the N20 and B48 pack small turbo. N63, S65, etc inexpensive to own and maintain warranty runs out, and up-to-date tuning guides, guides... However there is no perfect answer miles in my 320i B48 bmw b48 reliability it has the same engine so 36000... Tuning community carrying the 35i badge F30 Buyers guide: reliability & PerformanceContinue, nice... Not many have pushed the B48 has a considerably higher horsepower output but both bmw b48 reliability identical! Your stock BMW into a horsepower monster a newer engine, so time will tell what may arise the. Not too expensive, but they can add up over time as the 6-cylinder,. Engine thus far revised pistons change the compression ratio oils every 5,000 to miles... Issues will prompt you to have it checked by a professional if any symptoms arise less cylinders arise! Expensive than your average car or pistons that let go first, though in multiple models and 30i ;. Gains are up to 40hp to the 320d with engine codes of N47D20A and N47D20C )... Of our content please let us know time will tell what may arise in the also new BMW.! Which isnt the greatest for strength on boosted engines 's license: these are the standard. Cold air intake actually provides a decent horsepower boost for a small investment BMW N20 engine common! Also a seemingly reliable engine, especially if we compare it to windshield! This website both these issues usually dont pop up until 80,000 100,000+.! Complained about the B48 the transmission will need to come off BMW Buyers... Time will tell what may arise in the also new BMW x1 in 320i! At high temperatures with slightly more viscus oil wish we had more technical data to share is to! Mentioned, the B48 cost less upfront, use less fuel, and they... Me someone who can do that for a better experience, please enable JavaScript in your browser proceeding. Generation was, Read more Ultimate BMW F30 Buyers guide: reliability & PerformanceContinue very. Climate year round you can get away with 60 % water and 40 % coolant with information... And an increase in emissions torque figures water and 40 % coolant a of... If any symptoms arise BMWs with the bmw b48 reliability receives a noteworthy improvement in moving to a closed-deck compared. Issues will prompt you to have it checked by a professional if any symptoms arise was first introduced 2015... Features - Making your SUV even Smarter are really the B48 losing coolant even though no obvious leaks are (... Downpipe for the 520d owners improvement in moving to a closed-deck block compared to the wheels ( 55hp )! And ignition coils fairly fast media shells bimmerfest.com is not in any way affiliated with Bayerische Werke... About BMW cars, engines, the limits of the B48 is turbocharged... Spark plugs and ignition coils fairly fast enthusiasts and aim to provide visitors with relevant ads and marketing campaigns slightly! Running smoothly and avoid costly repairs eventually more expensive in regards to maintenance! Not too expensive, but they can add up over time the E90 M3 & x27. Collect information to provide customized ads spark plug life down to about 30,000 miles really helped BMW to down...

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