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 EnginePowerTorqueYearsB48B16 at 5,000–6,000 rpm at 2,000–4,700 rpm 2017–B48B20 at 4,500–6,500 rpm at 1,300–4,300 rpm 2020–B48A20U1at 5,000–5,500 rpmat 1,350–4,200 rpmB48B20M0 at 5,000–6,500 rpm at 1,350–4,600 rpm 2016– at 5,000–6,500 rpm at 1,350–4,250 rpmB48A20M1 at 5,000–6,500 rpm at 1,250–4,600 rpm2014– at 4,700–6,000 rpm at 1,250–4,750 rpm at 5,000–6,000 rpm at 1,350–4,600 rpm at 5,000–6,000 rpm at 1,350–4,600 rpmB48B20M1 at 4,500–6,600 rpm at 1,450–4,200 rpm 2019–B48B20O1 at 5,000–6,500 rpm at 1,400–5,000 rpm 2016–B48A20O1 at 5,000–6,000 rpm at 1,250–4,500 rpm 2015– at 5,200–6,200 rpm at 1,250–4,800 rpm at 5,000–6,000 rpm at 1,450–4,500 rpmB48O1ZIK at 4,500–6,500 rpm at 1,600–4,000 rpmB48B20O0 at 5,200–6,500 rpm at 1,450–4,800 rpm 2015–B48B20O1 at 5,000–6,500 rpm at 1,550–4,400 rpm 2019–B48A20T1 at 5,000–6,250 rpm at 1,750–4,500 rpm 2019–B48A20T2 at 5,000–6,250 rpm at 1,750–4,500 rpm 2024–
115 kW version 2020–present G20 318i 2022–present G42 218i
125 kW version 2019–present G20 320i (Turkish and Tunisian market) 2020–present G22 420i (Turkish market) 2021–present G26 420i (Turkish market) 2017–present G30 520i (Turkish and Tunisian market) 2018–present G01 X3 sdrive20i (Turkish market)
131 kW version 2021–present F54 MINI Cooper S Clubman (B48A20M) 2020–2024 F40 BMW 120i
135 kW version When combined with the electric motor, the 330e and 530e overall output is and .
2016–2019 F20 120i 2016–2019 F22/F23 220i 2015–2019 F30/F31/F34 320i 2016–2019 F30 330e 2016–2019 F32/F33/F36 420i 2017–present G30/G31 520i 2018–present G30/G31 530e 2018–present G01 X3 xDrive20i 2018–present G02 X4 xDrive20i 2019–present G20 320i 2019–present G20 330e 2020–present G22 420i 2021–present G42 220i
141 kW version
2017–2020 F60 MINI Cooper S Countryman 2014–2017 F45 BMW 2 Series Active/Gran Tourer 220 2024–present G45 X3 20/30e xDrive
145 kW version In the MINI Cooper S, a temporary overboost increases peak torque by to .
2014–present F56 MINI Cooper S (B48A20A) 2020–present F44 220i Gran Coupe 2016–present F48 X1 20i 2017–present F39 X2 sDrive20i 2018–2026 G29 Z4 sDrive20i 2019–2026 J29/DB82 Toyota Supra (Japanese SZ models)
150 kW version 2024-present F70 123
165 kW version 2016–2019 F20 125i 2021–present U06 223i
170 kW version 2014–present F56 MINI JCW Hardtop and JCW Cabrio (320 Nm) 2017–present F56 MINI JCW Clubman and JCW Countryman ALL4 (350 Nm) 2015–present F45 Active Tourer 225i 2016–present F48 X1 25i/28i 2017–present F39 X2 25i/28i 2019–current F44 228i Gran Coupé xDrive
180 kW version 2022–present G42 230i 2022–present G20/G21 330i 2022–present G22 430i 2023–present U11 X1 28i xDrive
185 kW version 2015–2019 F30/F31/F34 330i 2016–present F22/F23 230i 2016–present F32/F33/F36 430i 2018–present G01 X3 xDrive30i 2018–present G02 X4 xDrive30i 2020–present G01 X3 xDrive30e (PHEV Version) 2016–present G30/G31 530i
190 kW version 2016–present G11 730i/730Li 2017–2019 G11 740e xDrive/740Le xDrive (combined with an 82 kW electric motor for a total output of 240 kW) 2017–2021 G32 630i 2019–2022 G20/G21 330i 2019–2026 G29 Z4 sDrive30i 2019–2026 J29/DB22 Toyota Supra 2020–present Morgan Plus Four 2020–present G22/G23/G26 430i
195 kW version 2020–2024 BMW F40 128ti
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.
2019–2024 F40 M135i xDrive 2019–2024 F44 M235i xDrive Gran Coupé 2019–2023 F39 X2 M35i xDrive 2019–present F54 Clubman JCW 2019–present F60 Countryman JCW 2020–present 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 2024–present U11 X1 M35i xDrive 2024–present U10 X2 M35i xDrive 2024-present U25 Countryman John Cooper Works All4
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