The BMW B48 is a turbocharged inline-four petrol engine which replaced the BMW N20 and has been in production since 2014. It was first used in the F56 Mini Hatch and has been used in BMW applications since 2015.
The B48 is part of a modular BMW engine family of 3-cylinder (B38/B37), 4-cylinder (B48/B47) and 6-cylinder (B58/B57) engines, which use a displacement of per cylinder.
A SULEV version of the BMW B48, the B46, is sold in the United States and other regions with strict emissions standards. Outside of minor differences, primarily with emissions control hardware, the two lines of engines are essentially identical and feature similar performance and reliability.
Design
Compared with its N20 predecessor, the B48 uses a more undersquare design, and an engine block using "closed-deck construction". As with the N20, the block and head are made from aluminium. Other features shared with the N20 include a twin-scroll turbocharger, direct injection, variable valve lift (Valvetronic) and variable valve timing (Double VANOS).
Technical Update versions
The B48 engine was revised in 2018, dubbed "B48TU" ("Technical Update"), with notable changes and improvements; a new one-part timing chain as opposed to the earlier two-part, a new separate cooling circuits for the cylinder head and crankcase, and forged conrods and forged crankshaft is now lighter due to the use of lighter materials and different machining. The fuel system also upgraded with the new Bosch HDP6 high pressure fuel pump and Bosch HDEV6 injectors that borrows from the P48 Turbo Engine.
Models
115 kW version
- 2020âÂÂpresent G20 318i
- 2022âÂÂpresent G42 218i
125 kW version
- 2019âÂÂpresent G20 320i (Turkish and Tunisian market)
- 2020âÂÂpresent G22 420i (Turkish market)
- 2021âÂÂpresent G26 420i (Turkish market)
- 2017âÂÂpresent G30 520i (Turkish and Tunisian market)
- 2018âÂÂpresent G01 X3 sdrive20i (Turkish market)
131 kW version
- 2021âÂÂpresent F54 MINI Cooper S Clubman (B48A20M)
- 2020âÂÂ2024 F40 BMW 120i
135 kW version
When combined with the electric motor, the 330e and 530e overall output is and .
- 2016âÂÂ2019 F20 120i
- 2016âÂÂ2019 F22/F23 220i
- 2015âÂÂ2019 F30/F31/F34 320i
- 2016âÂÂ2019 F30 330e
- 2016âÂÂ2019 F32/F33/F36 420i
- 2017âÂÂpresent G30/G31 520i
- 2018âÂÂpresent G30/G31 530e
- 2018âÂÂpresent G01 X3 xDrive20i
- 2018âÂÂpresent G02 X4 xDrive20i
- 2019âÂÂpresent G20 320i
- 2019âÂÂpresent G20 330e
- 2020âÂÂpresent G22 420i
- 2021âÂÂpresent G42 220i
141 kW version
- 2017âÂÂ2020 F60 MINI Cooper S Countryman
- 2014âÂÂ2017 F45 BMW 2 Series Active/Gran Tourer 220
- 2024âÂÂpresent G45 X3 20/30e xDrive
145 kW version
In the MINI Cooper S, a temporary overboost increases peak torque by to .
- 2014âÂÂpresent MINI Cooper S (B48A20A)
- 2020âÂÂpresent F44 220i Gran Coupe
- 2016âÂÂpresent F48 X1 20i
- 2017âÂÂpresent F39 X2 sDrive20i
- 2018âÂÂpresent G29 Z4 sDrive20i
- 2019âÂÂpresent J29/DB82 Toyota Supra (Japanese SZ models)
150 kW version
165 kW version
- 2016âÂÂ2019 F20 125i
- 2021âÂÂpresent U06 223i
170 kW version
- 2014âÂÂpresent F56 MINI JCW Hardtop and JCW Cabrio (320 Nm)
- 2017âÂÂpresent F56 MINI JCW Clubman and JCW Countryman ALL4 (350 Nm)
- 2015âÂÂpresent F45 Active Tourer 225i
- 2016âÂÂpresent F48 X1 25i/28i
- 2017âÂÂpresent F39 X2 25i/28i
- 2019âÂÂcurrent F44 228i Gran Coupé xDrive
180 kW version
- 2022âÂÂpresent G42 230i
- 2022âÂÂpresent G20/G21 330i
- 2022âÂÂpresent G22 430i
- 2023âÂÂpresent U11 X1 28i xDrive
185 kW version
- 2015âÂÂ2019 F30/F31/F34 330i
- 2016âÂÂpresent F22/F23 230i
- 2016âÂÂpresent F32/F33/F36 430i
- 2018âÂÂpresent G01 X3 xDrive30i
- 2018âÂÂpresent G02 X4 xDrive30i
- 2020âÂÂpresent G01 X3 xDrive30e (PHEV Version)
- 2016âÂÂpresent G30/G31 530i
190 kW version
- 2016âÂÂpresent G11 730i/730Li
- 2017âÂÂ2019 G11 740e xDrive/740Le xDrive (combined with an 82 kW electric motor for a total output of 240 kW)
- 2017âÂÂ2021 G32 630i
- 2019âÂÂ2022 G20/G21 330i
- 2019âÂÂpresent G29 Z4 sDrive30i
- 2019âÂÂpresent J29/DB22 Toyota Supra
- 2020âÂÂpresent Morgan Plus Four
- 2020âÂÂpresent G22/G23/G26 430i
195 kW version
225 kW version
Introduced in May 2019 this engine features a reinforced crankshaft with larger main bearings and new pistons with a lower 9.5:1 compression ratio, this allows the engine to take more boost pressure from a larger turbocharger, which blows compressed air through a reworked intake tract.
- 2019âÂÂ2024 F40 M135i xDrive
- 2019âÂÂ2024 F44 M235i xDrive Gran Coupé
- 2019âÂÂ2023 F39 X2 M35i xDrive
- 2019âÂÂpresent F54 Clubman JCW
- 2019âÂÂpresent F60 Countryman JCW
- 2020âÂÂpresent F56 MINI John Cooper Works GP
233 kW version
In the EU BMW has had to drop the power output to 300 hp due to new emissions standards. In the US it actually gets an upgrade to 312 hp.
- 2025-present F70 M135 xDrive
- 2025-present F74 M235 xDrive Gran Coupé
- 2024âÂÂpresent U11 X1 M35i xDrive
- 2024âÂÂpresent U10 X2 M35i xDrive
- 2024-present U25 Countryman John Cooper Works All4
References