Dear Fellow Cayenne Hybrid owners:
I recently bought a 2012 Cayenne Hybrid with about 30k miles on it. As I get use to the car, I started noticing a pulsing type of drone noise around 70-80mph on the 8th gear accelerating. At the beginning I thought it was the tire but I start noticing that it only happen when my foot is on the gas and as soon as I let it go the noise is gone.
I brought it back to the dealer and both the head service tech and the regional service manager took a ride and said it was "normal" to have this pulsing drone and all hybrids "may" have that.


Wow, I said, a car with a sticker price of $96780 would have a Pulsing Drone and it's "NORMAL"? I better start doing some research on my own.


What do you think most likely it is?
Drive shaft?
Rear Diff?
Transmission?
Exhaust?


Thanks for reading.

 

Is it the supercharger?

 

Not sure, it's a low pulsing kind of drone. It rings about 60 beats per minute repeatedly.