Used Sensor / Monitor for Lane Change Assist / Blind Spot Monitor for Audi A3. This is Master Monitor. 

Fits various years of A3. May also fit other models of Audi 

(if the part number is exactly the same). 

Before you buy my Sensor / Monitor, make sure your old Sensor / Monitor has the same exact part number.

If you old Sensor / Monitor is missing or badly damaged, 

then please call your local Audi dealer and talk to the parts department. You need to be sure that my part is what you need. 

I don't accept returns. 

Save money with local pick up: Woodlyn PA 19094 or 

Glenmoore PA 19343.