BMW N20B20A engine

BMW N20B20A engine

Product Overview

For sale is a brand-new, complete BMW 520i engine, engine code N20B20A / N20B20B, compatible with the BMW F07 5 Series Gran Turismo, F10 5 Series Saloon, and F11 5 Series Touring. The engine is supplied complete as pictured — exactly as shown in the accompanying photographs, with all components and attachments included — making it a direct, ready-to-install replacement for any of the above applications.

This is a new unit — not rebuilt, not remanufactured, and not used. For owners and workshops requiring a fully fresh engine with zero operational history, this represents the most straightforward and reliable solution available outside of BMW main dealer supply.

Engine Specification & Compatibility

Engine Code Note – N20B20A and N20B20B

This engine is listed under both the N20B20A and N20B20B designations. These two codes refer to closely related variants within the BMW N20 engine family — both 2.0-litre turbocharged four-cylinder units sharing the same fundamental architecture, used across the F07, F10, and F11 5 Series range. The suffix difference (A vs B) relates to minor production or market-specific variations within the same engine family rather than a fundamental difference in specification or fitment.

Buyers are advised to cross-reference their vehicle’s existing engine code — visible on the engine block itself and confirmed in the vehicle’s documentation — prior to purchase to ensure the correct variant is selected for their specific car. Please contact us if you require assistance confirming compatibility for your vehicle.

About the BMW N20B20 Engine

The BMW N20 is a 2.0-litre turbocharged four-cylinder engine introduced by BMW in 2011 as part of their transition away from the naturally aspirated N46 and N52 six-cylinder units. The N20 uses BMW’s TwinPower Turbo technology — combining a twin-scroll turbocharger with direct injection, Valvetronic variable valve lift, and Double VANOS variable camshaft timing — to deliver a combination of performance and efficiency that BMW used to justify replacing larger displacement engines with this compact, lighter unit.

In 520i specification, the N20B20 produces 184 horsepower and 270 Nm of torque — figures that represent a significant advance over the naturally aspirated engines it replaced, with substantially improved fuel consumption and CO2 emissions. The engine’s torque delivery is notably strong from low RPM, giving the 520i a responsive, flexible driving character that suits both long-distance motorway use and urban driving.

The N20 family was used across a wide range of BMW models during the F-series generation and has accumulated a large installed base, meaning that parts supply, specialist knowledge, and independent service infrastructure are well established — an important consideration when selecting a replacement engine.

Ideal For

• BMW F10 520i Saloon — direct engine replacement following failure, damage, or timing chain issues
• BMW F11 520i Touring — complete engine swap with full confidence in component condition
• BMW F07 520i Gran Turismo — new engine supply for GT-bodied 5 Series
• Independent BMW workshops seeking new engine stock for N20B20 customers
• Fleet operators requiring a rapid, reliable engine replacement to minimise vehicle downtime
• Private owners carrying out a DIY or specialist-assisted engine replacement on any of the above models

Purchasing & Enquiries

This brand-new BMW N20B20A / N20B20B engine is available for immediate sale. It is complete and supplied exactly as shown in the listing photographs. Compatible with the BMW F07, F10, and F11 5 Series in 520i specification.