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If you had max cool mode enabled then it possibly could shorten the life of the pump. Mine went at 54k (miles), but there were three others at my indy with similar mileage and dead pumps that did not have tunes.
You can put it in map 0 and unless they go into the ECU housing they will not see it. My indy guy had no idea I had a tune until after I picked the car up and told him...then he wanted a ride.
I've also had it into BMW on more than one occasion with the JB on 0 and they said nothing, but this was for routine maintenance and a clutch replace under warranty.
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