On the rear underbody of our cars there is two outer grommets on the box section that can be removed if you was fitting the Audi jack pad kit , just inboard of the rear jacking point. when u remove the far end one it is down to metal around the edge of outer hole, it’s not big but it’s there. Some are cover slightly in wax so it’s hard to see but with your finger wipe the wax and you will see.
How do I know this? Well went to fit my jack pad kit and when pulling out grommet I could see then I drove to dealership and went out back where all the new stock cars are waiting to be pdi, I removed at least 8 of these grommets and every single one had it, some worse than others but all had it.
Explanation: when our cars our made in the factory the car is cradled in 4 holes in the frame 2 in front to in back and it’s this which cause wear through the primer coating,
Is this a problem maybe/maybe not as I think the grommet and some wax could possibly seal this but 2 of the cars had little tiny bits of rust but was ver tiny about 6 mil by 1mil long but all the same it’s not good enough, I have tried posting images but for the life of me I can’t
