Some customers may experience the left headlamp not remaining closed after the lamps are turned "off" or the left headlamp closes when the lamps are turned "off", but then will reopen. (In either case the right headlamp works correctly)
The kit will shim the motor away from the mounting surface. New travel stops / bumpers are included. Both will work to give a more positive stop to the motors travel.
Products may be labeled as fitting either the left or right side. The left or right side can be determined by your position while sitting in the car facing forward. Your left would be the left side and your right would be the right side.