To cut a long story short, my air bag light came on, so i took it back to garage where i got it from. I happened to mention it was making a whiring noise (for the record i dont no a thing about cars) i thought it might just be a bearing. After further investagation they told me it was the oil pressure pump (i think), they wouldnt let me take the car, until it was fixed, apparantly it can knacker the engine if it goes. Car is a4avant 2.0 TDi 140. Should i be worried? Once it has been replaced will it be ok?