Just wondering, that is the average lifespan of the supercharger unit in our Previas? 60k 120k 200k miles? I recently had my supercharger belt changed, and now I feel less boost and was advised by the mechanic that my SC is on its way out / that I should look into rebuilding the unit. Called my local dealer for fun and I was quoted $4,800 for a new SC unit. Have any of you guys rebuilt your SC unit? How much can I drive the van with a weak supercharger?