I have a 2007 Audi A6 3.2L Quattro i was wondering how can i tell what is the rotor size for the back on my car not sure if i needed the front size too the parts store said it could be 302mm or up for the back one i would greatly appreciate the help i cannot measure these rotors though i do not have tools so i must get the right parts

 

Outside of actually measuring it, most rotors are stamped with diameter and minimum allowed thickenss. But, if you don't have the tools to check the rotors, how do you propse to change them out? A good part store will be able to figure out what rotors you need from the VIN number.

 

The 3.2 has the smaller ones. The larger ones are far the 4.2

 

I can feel the rotors and can see they are in need of replacement you can tell by looking at the outside of circle of the rotor and it has edges and groves where the rotors surface use to be and is deteriorated from brakes. I just replaced all brakes on the car and its still squeaking from one rotor and i just want to change them all since i have never i am the 2nd owner of the car it is at 79,000 miles and asked for brake pad replacement. But i appreciate your concern thank you very much for the help.

 

thank you kevin i figured it out when i was looking online it showed that the smaller diameter rotors are for a 3.2 L V6 which made sense thanks a lot

 

A 2007 Audi A6 3.2L Quattro Rotor Size is
Front rotors 320mm ILG
Back Rotors 302mm IKD
i also have the option code after the size