Vauxhall Signum Fuel Tank Replacement Parts

The Signum was produced from 2003 to 2008 as a single generation, with a facelift arriving in 2005. Tanks from within the same pre- or post-facelift period are most likely to interchange directly, but whether a pre-facelift tank fits a post-facelift car depends on whether ancillary fittings and sender unit connections changed at that point — confirm this with the breaker against your registration before ordering. Engine code and fuel type (petrol or diesel) are the most important details to have to hand.

The 2005 facelift is the key boundary here: a tank from a 2004 pre-facelift car may or may not match a 2006 post-facelift car, as mounting points and fuel pump connections can change mid-production at a facelift point. Name the boundary confidently to the breaker — tell them your car is post-2005 facelift — and ask them to confirm the part number matches your registration before you buy. Never assume a pre-facelift tank is a straight swap for a post-facelift car without that check.

Yes — fuel type is critical, as a petrol tank and a diesel tank are not interchangeable due to differences in filler neck size, sender units, and in some cases tank shape or capacity. Beyond that, the engine code is the most reliable guide to which exact tank variant was fitted, so check your V5C or run a VIN check to confirm your engine code before approaching a breaker. Providing the engine code alongside your registration gives the breaker the best chance of supplying the right unit.

Gearbox type can influence underbody layout and tank shape or mounting on some vehicles, so it is worth telling the breaker whether your car is manual or automatic. In practice the tank itself is often the same across gearbox types on a given engine, but this is worth confirming with the breaker against your specific registration rather than assuming. Supplying your engine code and gearbox type alongside your reg gives the clearest picture.

Trim level does not affect fuel tank fitment on the Signum — the tank is determined by engine code, fuel type, and production year, not by whether the car is an Elegance, Design, or Vector. You may find cosmetic differences between cars stripped from different trim levels (interior quality, seat condition, and so on) but the tank itself is a mechanical part that follows the drivetrain spec. Focus on matching engine code and fuel type, and confirm the year falls within the same facelift period as your own car.

The Signum shares its platform with the Vectra C, so there is some mechanical commonality between the two, but fuel tank dimensions and mounting arrangements may differ due to the Signum's distinct body structure. Whether a Vectra C tank of the matching engine code and fuel type will interchange with a Signum tank is something to confirm with the breaker against both registrations rather than assume. It is always safer to source a tank pulled directly from a Signum of the same fuel type and production period.