1, bumper buckle is aging. The buckle of Audi a6 1 rear bumper is aging and cannot be aligned with the fender, so it needs to be replaced with a new buckle.

2. The model is wrong. After the Audi a6 1 was purchased, the manufacturer gave the wrong fender model by mistake, resulting in dislocation, so it is necessary to contact the manufacturer for replacement.

3, the bumper comes with a gap. Audi a6 1 can not be aligned with the pair of fenders due to its own clearance during production, so it can be installed normally. These are the reasons why the rear bumper and fender of Audi a6 1 are not aligned.