the switch to the vaccum booster. i was told that there is a switch that connects with the booster and if it goes bad the booster wont work. i dont want to spend 450 for a new boster. so i thought i would try the switch.

 

No switch, but there is a check valve in the rubber line between the booster and manifold.

Mazda P/N FDY243480

Dave

 

If you're talking about the big black brake booster, they VERY rarely go bad. If yours is truly bad, get a used one - they're a dime a dozen.

Might want to let us know what problem you're trying to solve - you could be misdiagnosing something.

Dale

 

Yeah.....'switch'? Dave and Dale have the right of it. Post what is happening, why you think you are needing a "switch" for your brake booster unit.