According to volks world (ssp_223) the t piece allows the 1.4 to warm up to >30ºC whereas the 3L gets up to ~60ºC before returning fuel back to the tank Checking through etka based sites like partsbase.org and partscats.info it comes up with the P/N 038906081B for all of lupos diesel engines and also covers many others Vag models. Does anyone have any idea how there could be two with the same P/N Does anyone know of the alternative that may have been used in the lupo/ A 1.2 3L Thanks Keelan