Engine Mini B48A20B

The 2.0-liter Mini JCW B48A20B turbo engine has been assembled at the company’s factories since 2014 and is installed on many third-generation Mini models in a charged John Cooper Works version. There are two options for boosting this unit: the usual 231 hp version and the GP version with 306 hp.

B38/B48-series engines: B38A12A, B38A15A, B48A20A, B48A20B.


Production years since 2014
Displacement, cc 1998
Fuel system direct injection
Power output, hp 231
306 (GP version)
Torque output, Nm 320 – 350
450 (GP version)
Cylinder block aluminum R4
Block head aluminum 16v
Cylinder bore, mm 82
Piston stroke, mm 94.6
Compression ratio 10.2
9.5 (GP version)
Features Valvetronic
Hydraulic lifters yes
Timing drive chain
Phase regulator on both shafts
Turbocharging MHI TD04LR6W
Recommended engine oil 5W-30
Engine oil capacity, liter 5.0
Fuel type petrol
Euro standards EURO 6
Fuel consumption, L/100 km (for Mini John Cooper Works 2016)
— city
— highway
— combined
Engine lifespan, km ~230 000

The engine was installed on:

  • Mini Cabrio 3 (F57) since 2016;
  • Mini Clubman 2 (F54) since 2016;
  • Mini Countryman 2 (F60) since 2017;
  • Mini Hatch 3 (F56) since 2015.

Disadvantages of the Mini B48A20B engine

  • In 2017, the timing belt design was modernized and now the chain does not quickly stretch;
  • Often there are floating engine speeds due to a malfunction of the tank vent valve;
  • Closer to 100,000 km, valve stem seals often tan and oil burns appear;
  • At high mileage, failures occur in the phase regulators or the Valvetronic system.

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