Used Vauxhall Cavalier Fuel Injection Pump

The Cavalier ran across two clear generations in the UK: the Mk2 (1981–1988) and the Mk3 (1988–1995), with the Mk3 receiving a facelift in 1992. Pumps from within the same generation and sharing the same engine code are the most likely candidates for a straight swap, but crossing the Mk2-to-Mk3 boundary is a different matter entirely — confirm any cross-generation fitment with the breaker against your registration before ordering. The engine code, found on your V5C or via a VIN check, is the single most important detail you can give them.

Both years fall within the Mk3 generation (1988–1995), but 1993 sits on the far side of the 1992 facelift, which can bring running-gear and ancillary changes that affect whether a pump swaps cleanly. If both cars share the same engine code the chances are good, but you should confirm the specific interchange with the breaker against both registrations, as mid-production mounting or fuelling changes can catch buyers out. The engine code is the detail to lead with.

Trim level alone does not determine which fuel injection pump fits a Cavalier — what matters is the engine code, fuel type, and gearbox type, none of which are dictated by the GL, CDi, or GSi badge. A GSi will carry a sportier engine with its own specific code, so if a GL and a GSi happen to share the same engine code they would use the same pump, but that coincidence is down to the engine, not the trim name. Give the breaker your engine code rather than your trim name and you will get a much more reliable answer.

The engine code is the most important piece of information for this part — it tells the breaker exactly which variant of the engine your car runs, which is what the pump is calibrated for. You can find the engine code on your V5C registration document or by running a VIN check through a reputable UK data provider. Pass that code to the breaker alongside your registration and fuel type, and they can cross-reference their stock accurately.

No — diesel and petrol fuel injection systems are entirely different in design and function, and the pumps are not interchangeable under any circumstances. A diesel Cavalier uses a high-pressure rotary or inline pump suited to compression ignition, while a petrol car uses a completely different injection arrangement. Always confirm your fuel type with the breaker alongside your engine code to make sure you are quoted the correct pump.

It can matter, because on later fuel-injected Cavaliers the engine management ECU and certain components may carry coding tied to the original vehicle, which can cause issues if the pump and ECU are not correctly matched to your car. Whether a specific used pump will work with your existing ECU without any reprogramming is something you must confirm with the breaker or a specialist against your registration, as this is not something that can be stated as a blanket rule. A good breaker should be able to advise you on what they know about the unit's history and whether any re-coding work is likely to be needed.