Originally Posted by MK23

You take your car for washing 3x/week and you've never had a belt squeal? You're lucky! I'm like Johnww. I cover the engine with towels whenever I wash it. I was dumbfounded when I washed the car for the first time and noticed water sizzling off the warm engine. Who at Porsche designed a car that can't sit in the rain for a few hours without soaking the engine? My belts squeal after the rain too. The first CEL I got was for a bad MAF sensor AFTER a wash. They replaced it, then since I've been covering the engine during washes, no problem. As others pointed out, it could have been a coincidence and not related. But this whole water in the engine compartment thing just can't be good over time...