Ok. The Golf VR I bought is a 'N'plate '96, BUT the engine was replaced a couple of years ago for Corrado 2.9 lump. The thing is, how can I tell what age the engine is (or at least get an idea). The code on the engine cover says 'AAA', but a mate of mine seems to reckon thats a Golf engine code, so it's quite possible that they used the same plastic engine cover from the original engine. Are there any discernable differences just looking at the exterior of the engine etc that I could use to tell the engine code/year etc? How can I tell if its an OBDI or ODBII engine? Or did the Corrado only co