Please make sure this is the correct part before buying. In this product page you can see a VAUXHALL VECTRA C SIGNUM 02-10 2.0 DTI Y20DTH TURBO 24461826 VS1777 that will fit a Vauxhall Signum and any of the vehicles in the compatibility list. This vehicle part is a Used part, so please ensure it is the right one before buying.