My autodim interior mirror is streaky does not respond to headlights behind me. Looking for replacement part and found part # 8691686 which translates to 30658230.

The dealer wants nearly $900.00 to replace, any suggestions of an alternative will be helpful.

Still not sure that I have the correct part number...

 

any unit new or used must be reprogrammed for your car.
If you replace by used one your remotes won't work even if software in general is compatible with your car.