The BMW B47 diesel engine is a turbocharged inline four-cylinder diesel engine that debuted in 2014, replacing the N47 engine. The B47 engine was first introduced in the BMW X3 F25. The B47 belongs to the B-series family of modular engines, including the B37 and B57 diesel engines, as well as the B38, B48 and B58 gasoline engines, which have a total displacement of 500cc per cylinder. The B47 engine is equipped with Common Rail injection and has a displacement of 2 liters (1995 cc).
Among the design features of the B47 (B47D20O0) we should note the closed aluminum cylinder block, aluminum 16-valve cylinder head, equipped with hydrocompensators and chain-driven timing. Cylinder diameter is 84 mm, piston stroke is 90 mm, and compression ratio is 16.5 to 1. Injection is carried out by CR Bosch system and differs depending on the version of the engine: the younger versions have electromagnetic injectors, the older one uses piezo injectors. Also younger versions of the engine have one Garrett turbocharger, while the older models already have two turbines.
The BMW B47 engine meets the Euro 6 emissions standard and features a double overhead camshaft with 4 valves per cylinder and a single turbocharger. The 221 hp and 228 hp engine lineup is equipped with a twin turbocharger. Compared to the N47, the B47 engine offers more power and higher torque across the entire engine speed range. This provides better acceleration and dynamism values. Identical parts, which are also used in the other new diesel and gasoline engines of the B-series modular system, provided greater production flexibility in case of fluctuations in demand and reduced costs for the automaker.
2017 update
A technical update (codenamed B47TÜ1) took place in November 2017, which added a number of innovations and improvements: an exhaust gas treatment system with AdBlue injection was introduced, twin turbocharging became available for the younger models, a new biturbocharger provided higher injection pressures – 2,500 bar for the 18d and 2,700 bar for the 20d. Improvements were made to the shapes and surfaces of the cylinder liners (cylinder liner shape honing was done) and pistons, belt drives and oil supply, which had an impact on reducing fuel consumption. In addition, solenoid valve injectors were introduced.
2019 update
As of November 2019, the B47 is now part of a mild hybrid, with the addition of a 48-volt starter-generator, which makes even more efficient use of regenerative energy, which not only powers the on-board electronics but also provides the boost function. In this way, turbo lag can be minimized and additional drive power can be provided. The maximum additional drive power amounted to 8 kW (11 hp). This measure also further optimized the start-stop function, allowing the engine to start without jerking. The scope of the coasting function has also been expanded: in addition to the already applicable separation of the engine from the transmission, the engine can be completely disengaged at higher speeds.
Let’s take a closer look at the BMW B47 motor versions
The B47 motor lineup is quite large and includes motors ranging from 116 to 231 hp with torque from 270 to 500 Nm. Depending on the drive, the BMW B47 motor is designated by different factory index: B47C20 – for cars with front-wheel drive, with rear-wheel drive – B47D20. On MINI Cooper – B47C20A.
B47 (116 hp, 270 Nm)
- 2015-2019 – F30 / F31 316d
- from 2020 – G20 316d
B47 (150 hp, 320-330 Nm)
- 2014-2016 – F10 518d
- from 2014 – F45 218d Active Tourer
- from 2014 – F46 218d Gran Tourer
- from 2015 – F20 118d
- from 2015 – F22 218d
- 2015 – F25 X3 sDrive18d
- 2015-2019 – F30/F31/F34 318d
- from 2015 – F32/F36 418d
- from 2015 – F48 X1 sDrive18d
- from 2015 – F54 MINI Cooper D Clubman
- from 2017 – F39 X2 sDrive18d
- from 2017 – F60 MINI Cooper D Countryman
- from 2018 – G30 518d
- from 2019 – G20 318d
- from 2019 – F40 118d
B47 (150 hp, 360 Nm)
- F10 518d with 360 Nm at 1750-2500
- F25 X3 18d with 360 Nm at 1500-2250
B47 (170 hp, 360 Nm)
F56 MINI Cooper SD
B47 (190 hp, 400 Nm)
- 2014-2016 – F10/F11 520d
- from 2014 – F26 X4 xDrive20d
- from 2014 – F45 220d Active Tourer
- from 2014 – F46 220d Gran Tourer
- from 2015 – F20 120d / 120d all-wheel drive
- from 2015 – F22/F23 220d
- 2015 – F25 X3 sDrive20d/xDrive20d
- 2015-2019 – F30/F31/F34 320d
- from 2015 – F32/F36 420d
- from 2015 – F48 X1 sDrive20d
- from 2015 – F54 MINI Cooper SD Clubman
- from 2016 – G30/G31 520d
- from 2017 – F39 X2 xDrive20d
- from 2017 – F60 MINI Cooper SD Countryman
- from 2017 – G01 X3 xDrive20d
- from 2018 – G02 X4 xDrive20d
- from 2018 – G32 620d Gran Turismo
- from 2019 – G20 320d
- from 2019 – F40 120d all-wheel drive
- from 2019 – F44 220d Gran Coupé
- from 2021 – G42 220d
B47 (205 hp, 430 Nm)
For all BMW models with optional power kit for the base 190 hp engine.
B47 (224 hp, 450 Nm)
- from 2015 – F20 125d
- from 2015 – F22 225d coupe
- from 2016 – F30/F31/F34 325d
- from 2016 – F32/F33/F36 425d
B47 (231 hp, 450 Nm)
- from 2016 – F48 X1 xDrive25d
- from 2018 – F39 X2 xDrive25d
B47 (231 hp, 500 Nm)
- 2018-2019 – G01 X3 xDrive25d
- 2018-2019 – G02 X4 xDrive25d
- from 2018 – G05 X5 xDrive25d
- 2015-2018 – F15 X5 sDrive25d / xDrive25d
- 2017-2019 – G30/G31 525d
- 2016-2019 – G11 725d/725Ld
B47 motor problems and recommendations
EGR valve
Most of the problems with this engine are related to the EGR system – at a low mileage of 30 thousand kilometers the valve could get clogged, due to this there was even a recall campaign. When it is jammed in the open position, the intake manifold bursts due to overheating.
Intake system, soot
In second place in the frequency of calls to the car service is the contamination of the intake manifold and channels, which leads to loss of traction and unstable engine operation. In the most neglected cases, with heavy soot and soot deposits, the intake swirl flaps can jam and break.
TIMING
In general, timing chains on B-series engines serve well and significantly longer than on N-series engines, but with aggressive driving and harsh operating conditions can stretch at a mileage of 100 to 200 t.km. The solution to the problem is to replace the timing chains.
Maintenance
Like all modern diesels, these motors require quality fuel, maintenance and consumables, otherwise you will have a lot of problems with the Common Rail system – we recommend to do maintenance every 10 thousand km.
Particulate filter
Exhaust gas cleaning system and particulate filter can cause a lot of trouble. At high mileage, when the filter from natural wear and tear ceases to perform its function, it will be necessary to replace it or remove it with program disconnection.
Chip tuning
With the help of chip tuning, the power of diesel engines B47 can be increased up to 30%, and to achieve higher results in performance and dynamics will help modifications – modernization of turbochargers, intercoolers, camshaft, exhaust system.
What oil should be used in B47?
For the B47 engine, the automaker recommends synthetic motor oil of BMW LL-04 specification and SAE 5W-30 viscosity. For the winter period, it is recommended to switch to an oil with SAE 0W-30 viscosity (LL-04 or LL-01FE).
In conclusion – is the BMW B47 engine reliable?
BMW B47 diesel engine is a reliable unit, for its long and trouble-free operation do regular maintenance, do not bring it to overheating, warm up the engine longer in cold weather, fill up with quality fuel, carry out preventive cleaning of the intake system and go on long trips to burn out the particulate filter.
BMW B47 engine resource without serious breakdowns reaches up to 200 thousand kilometers and more, and with careful operation is able to reach 350+ thousand kilometers of mileage.