Power Steering / Aircon Tensioner Pulley - Mitsubishi Legnum VR4 Galant VR4 EC5W EC5A This tensions the P/S-A/C belt. It is very prone to the bearing failing due to it's proximity to the road. To check it reach in far around back of drivers wheel and grab the pulley and rock top to bottom any more than 2mm of play and it's on it's way out. They do have a little play even when brand new (They are designed to) Exploded Diagram HERE Belt Layout diagram HERE Mitsubishi Part Number MD366344 Koyo
