Used BMW 1 Series Fuel Injection Pump

This depends on whether both cars share the same engine code, because the 1 Series ran across two distinct generations: the E82/E87 generation ended in 2013, and the F20/F21 generation ran from 2011 onwards, meaning 2012 and 2015 cars sit in different generations with different engine architectures. Even if both are, say, 2.0-litre diesel, the engine codes and injection system designs differ across that generational boundary, so a direct swap is very unlikely to work. Give the breaker both engine codes from your V5 documents or a VIN check, and they can confirm whether the pumps are compatible.

The engine code is what determines fitment here, not the badge — a 118d and a 120d can share the same physical engine in certain model years, in which case the injection pump may well interchange, but in other years they differ, so you cannot rely on the badge alone. Pull the engine code from your V5 or a VIN decoder and give that to the breaker, who can match it precisely. Trim or power output figures are not a reliable guide for mechanical parts like this.

Trim level — whether SE, Sport, M Sport, or M140i — does not affect which fuel injection pump fits your car; what matters is the engine code, fuel type, and gearbox type. An M Sport badge does not change the injection pump specification compared with an SE on the same engine. The breaker will match the pump to your engine code, so focus on having that to hand rather than worrying about trim — though be aware that cosmetic parts fitted alongside the pump bay may differ between trims.

The F20/F21 1 Series received a facelift in 2015, so a 2014 car is the pre-facelift version. For a mechanical component like the fuel injection pump, the facelift itself is less significant than the engine code, but ancillary fittings and mounting brackets can change mid-production run without following facelift dates exactly. Confirm with the breaker against your registration that the pump they have matches your specific build, as the engine code from your V5 is the safest reference point.

No — petrol and diesel injection systems are entirely different in design and operating pressure, and a petrol pump will not work on a diesel engine regardless of the model year or engine size. Always make sure the pump you source matches your fuel type as well as your engine code. Your breaker will need to know both to supply the correct unit.

Where the 1 Series and 3 Series genuinely share the same engine code, the core injection pump may be mechanically identical, and this is worth asking your breaker about because it can widen the pool of available used parts. However, whether ancillary connections, brackets, and ECU pairing requirements match your specific car is something to confirm with the breaker against your registration, as these details can vary even between cars using the same base engine. Never assume fitment solely because the engine displacement or badge looks similar.