Fits same as OEM. Wiring harness attached to the solenoid exactly as Audi original starter. Do not buy different aftermarket starter. The 12 volt positive link harness bolt on aftermarket solenoid may be too short, aprox 3/4 inch long, so you wont be able to attach the harness bolt. This Bosch starter has the needed ,long- 1inch positive solenoid bolt. I should have bought Bosch starter 1st. It would have saved alot of time and aggravation. Also great price compared to any place elsewhere. So far works great!