I have already asked in other forums, but there have not been sufficient answers so far. And now it is getting tight with the time. I have an Audi 100 (44) if it is of interest. I was at Tüv and a slightly damaged rubber part was discovered on a wheel suspension. Small part, big price, because the rubber alone is not available, but only the complete part and that would cost at Pit-Stop in about 250 euros, plus installation. A little bit a lot. So we clarified that I had the part I also found something on the internet and the cheapest provider (NK) has the part for 76 or 96 euros. Depending on which one, because I don’t know which one to take. I asked for it at a workshop and they recommended me to buy the part for: starting from chassis number 44M 002674. But now my number (easy ge-x-t) looks like this from WAUZZZ44ZLN080xxx WAU means the manufacturer code. The three Z before the 44 are part of the series, Audi fills unused places with Z’s (I think). The one Z after 44 is a test number (Z in this case probably means unused field, because in Europe, as I have read it somewhere, the test number does not matter), the 44 the series, L is the model year and N is the manufacturer’s factory. I have found out so much by now. 080xxx is the continuous number (here partly made unrecognizable by xxx by me). Important for substitutes In this case my number would be: 44L080xxx There is the same component once for up chassis number 44L11380, 44M002673 and then starting from chassis number 44M002674 I asked in a workshop. Although you saw that they didn’t know each other either, but somehow they found out the part by way of detour. And the part is according to their opinion starting from chassis number 44M002674 meanwhile ic I would rather type on – to chassis number 44L11380, 44M002673 -. L means the year 90, M the year 91. My vehicle was built and registered in 90. The double number for the component probably because the same model was built in L and M. It is all a bit confusing. Who should I believe, the workshop or me? No matter what part it is, because the one part has a bolt v 18 mm and the other 19 mm. What do you think?