frank

ive checked oe part numbers and they are the same and where ever i check what size axle bolt it should be it says 17mm? every kit ive checked comes with the same bolt. when i have found a 19mm bolt it says not compatible with my car?

Hi im new on here and looking for some advice please, i have the A5 coupe 2L TFSI ordered a front wheel bearing kit but came with a 17mm internal hex bolt, but i have 19mm on mine? any idea why