The BMW B47 is a turbocharged inline-four diesel engine that debuted in 2014 as a part of BMW’s modular B-series engine household, changing the N47. It’s a flexible unit present in a variety of fashions: the 1 Collection, 2 Collection, 3 Collection, 4 Collection, 5 Collection, X1, X3, X4, in addition to sure MINI fashions.
BMW designed the B47 to deal with the shortcomings of its predecessor whereas providing improved reliability, cleaner emissions, and higher tuning flexibility. On this article, we’ll discover the reliability, effectivity, tuning potential, and total professionals and cons of the B47 diesel.
Reliability
Total, the B47 has confirmed to be a reliable engine when maintained correctly. By relocating the timing chain to the entrance of the engine, BMW made it each extra sturdy and simpler to service in comparison with the N47.
The B47 is mostly considered a powerful and reliable engine, able to dealing with excessive mileage if correctly maintained. Homeowners commonly report properly over 120,000 miles with out main points. Certainly one of our writers had a BMW 320d with the B47 engine and he all the time praised it as being one of the vital dependable diesels he’s ever owned. Gasoline economic system was wonderful, and the engine nonetheless felt sturdy after 100k kilometers.
That mentioned, no engine is bulletproof. Widespread bother spots for the B47 embody:
- EGR valve and cooler failures, generally resulting in recollects.
- DPF (diesel particulate filter) clogging, particularly on automobiles pushed principally within the metropolis.
- Turbocharger put on if oil modifications are uncared for.
- Timing chain put on at very excessive mileage (far much less frequent than the N47).
Routine upkeep—oil modifications with BMW-approved oil, checking coolant and EGR situation, and taking the automobile on longer drives to assist the DPF regenerate—will enormously prolong engine life.
Effectivity
Effectivity is the B47’s strongest trait. BMW engineered the engine with common-rail direct injection, variable geometry turbocharging (on most variations), and AdBlue SCR injection to fulfill strict Euro 6 emissions requirements.
Relying on the variant, the B47 produces between 114 hp and 231 hp, with torque starting from 270 to 500 Nm. Regardless of the sturdy torque, gas economic system is spectacular:
- Smaller fashions just like the 116d or 320d can obtain 50–60 MPG (UK) on lengthy runs.
- Even heavier SUVs just like the X3 or X4 return 40+ MPG in real-world driving.
Later B47 variations (the B47TÜ1) additionally added twin-turbo setups and 48-volt gentle hybrid programs, additional boosting each effectivity and drivability.
Tuning
Diesel engines have all the time had good tuning potential, and the B47 is not any exception. With a easy ECU remap, homeowners usually see energy positive aspects of 30–50 hp and torque will increase of 60–80 Nm with out altering {hardware}.
For fans wanting extra, supporting mods can assist, corresponding to:
- Upgraded intercoolers for decrease consumption temps.
- Efficiency exhaust/downpipes (the place emissions guidelines permit).
- Bigger turbocharger swaps for severe energy.
That mentioned, whereas the B47 can deal with tuning properly, it isn’t as over-engineered as BMW’s bigger six-cylinder diesels just like the N57. Pushing it too far with out correct cooling, fueling, and upkeep can shorten its lifespan.
Execs and Cons
Execs
- Much more dependable than the N47 it changed.
- Glorious gas effectivity throughout all variants.
- Robust torque supply, particularly in twin-turbo variations.
- Good tuning potential for modest energy positive aspects.
- Extensive availability in BMW and MINI fashions.
Cons
- Nonetheless susceptible to EGR and DPF points over time.
- Turbocharger and timing chain put on potential at excessive mileage.
- Diesels are much less well-liked in some markets resulting from emissions laws.
- Much less strong beneath excessive tuning than BMW’s six-cylinder diesels.
BMW Fashions Utilizing The B47 Engine
- B47D20 (85 kW / 114 hp)
- B47C/D20 (110 kW / 148 hp)
- 2014–2016 F10 518d
- 2014–2021 F45 218d Lively Tourer
- 2014–2021 F46 218d Gran Tourer
- 2015–2019 F20 118d
- 2015–2021 F22 218d
- 2015–2017 F25 X3 sDrive18d
- 2015–2019 F30/F31/F34 318d
- 2015–2020 F32/F36 418d
- 2015–2022 F48 X1 sDrive18d
- 2015–2024 F54 MINI Cooper D Clubman
- 2017–2023 F39 X2 sDrive18d
- 2017–current F60 MINI Cooper D Countryman
- 2018–2023 G30 518d
- 2019–current G20 318d
- 2019–2024 F40 118d
- B47C/D20 (120 kW / 161 hp)
- 2015–2024 F56 MINI Cooper SD
- 2015–2018 F30 320d EfficientDynamics Version
- B47C/D20 (140 kW / 188 hp)
- 2014–2016 F10/F11 520d
- 2014–current F26 X4 xDrive20d
- 2014–current F45 220d Lively Tourer
- 2014–current F46 220d Gran Tourer
- 2015–current F20 120d / 120d xDrive
- 2015–current F22/F23 220d
- 2014–2017 F25 X3 sDrive20d / xDrive20d
- 2015–2019 F30/F31/F34 320d
- 2015–current F32/F36 420d
- 2015–current F48 X1 sDrive20d
- 2015–current F54 MINI Cooper SD Clubman
- 2016–current G30/G31 520d
- 2017–current F39 X2 xDrive20d
- 2017–current F60 MINI Cooper SD Countryman
- 2017–current G01 X3 xDrive20d
- 2018–current G02 X4 xDrive20d
- 2018–current G32 620d Gran Turismo
- 2019–current G20 320d
- 2019–current F40 120d xDrive
- 2019–present F44 220d Gran Coupé
- 2021–current G42 220d
- B47C/D20 (165 kW / 221 hp)
- 2015–2019 F20 125d
- 2015–2019 F22 225d
- 2015–2018 F30/F31/F34 325d
- 2016–2020 F32/F33/F36 425d
- B47C/D20 (170 kW / 228 hp)
- 2018–current G05 X5 xDrive25d
- 2015–2018 F15 X5 sDrive25d / xDrive25d
- 2016–current F48 X1 xDrive25d
- 2017–2019 G30/G31 525d
- 2018–current F39 X2 xDrive25d
- 2016–2019 G11 725d / 725Ld
Ought to You Get A BMW With The B47 Engine?
The BMW B47 is a balanced and reliable diesel engine. It corrects lots of the N47’s flaws, gives sturdy gas effectivity, and has simply sufficient tuning headroom to fulfill fans. Whereas not as bulletproof as BMW’s bigger diesels, it stays one of many higher selections in BMW’s trendy engine lineup—particularly when you worth torque, economic system, and longevity in a day by day driver.
