BMW X2 U10 Engines — The Complete UK Guide

“The B47 is BMW's modular four-cylinder diesel that replaced the notorious N47, with the timing chain relocated to the front of the engine for improved durability. Delivering 150–163 PS and strong torque (360 Nm), it offers excellent fuel economy (50+ MPG) with 48V mild-hybrid assistance for smoother stop-start and reduced turbo lag. It's the most efficient engine in the U10 range.”

Who it's for: buyers who need diesel economy and torque for long-distance driving.

“The 2.0-litre B48 delivers 204 PS and 300 Nm of torque with smooth, refined power delivery. It's BMW's modular four-cylinder petrol engine, sharing the B-series family's improved reliability over earlier turbocharged BMW engines. With 48V mild-hybrid assistance, it's responsive and efficient. It's the pick for buyers who don't need M35i performance but want more punch than the three-cylinder.”

Who it's for: buyers who want strong petrol performance without the M35i's running costs.

“While the B38 is generally reliable, the three-cylinder layout can feel strained under load in the heavy U10. Carbon build-up on intake valves is a known issue with direct-injection engines, particularly with urban driving. Early examples may also experience coolant system issues as the engine ages. However, these are manageable risks rather than catastrophic failures.”

Who it's for: buyers who want the most affordable U10 and accept the three-cylinder's character.

“The M35i's high-output B48 produces 300 PS and 400 Nm of torque. While the B48 is a robust engine, the increased power output places additional stress on the turbocharger, fuel system, and cooling system. A full engine replacement can exceed £7,500 — the most expensive U10 engine to repair.”

Who it's for: buyers who want M Performance power and are prepared for higher maintenance costs.

“The 170 PS three-cylinder delivers surprising punch with 48V mild-hybrid assistance, returning genuine 40+ MPG economy. It's the entry point to the U10 range but punches above its weight — smooth, characterful, and the most affordable to run. With a 7-speed automatic gearbox, it's perfectly adequate for daily driving.”

Who it's for: buyers who want the lowest running costs and don't need four-cylinder performance.

“The xDrive20d is often overlooked in favour of the petrol models, but it's the ultimate U10 for long-distance touring — 163 PS, 360 Nm of torque, all-wheel drive, and genuine 50+ MPG economy. It's the U10 for buyers who actually drive their cars.”

Who it's for: buyers who want the most efficient U10 with all-weather capability.