MR131420 is a Mitsubishi front suspension strut mount/upper insulator used to connect the MacPherson strut assembly to the vehicle body. Its rubber isolator helps absorb road impact and vibration and reduces suspension noise. It is installed at the top of the front strut and normally requires two pieces per vehicle. Later production variants may use MR316457 or MR455018, so fitment should be verified by model year and VIN.