You are bidding on an Oem BMW E46 M3 Rear Differential gear ratio 

This item has 85k miles on it. We have cleaned it up and put a coat of paint on it. It's looks to be in very good condition. There are a couple cooling fins that are broken. It does not affect the performance of the diff just the appearance of that one spot. 

Let me know if you have any questions. 

Thanks