Can someone try this for me? Keep ur door open, and go from park to reverse... is it supposed to make a air hissing sound when it switches into reverse gear??? It has me worried

 

Bump... come on some body try this for me

 

ok so i just tried this, mind you my car has been parked for about 3 hours. I went and started the car, went from park to reverse and did not hear any air hissing noise. Only thing i could think of is could it be your A/C maybe? Hope this helps. BTW im in an 08 RWD if that makes a difference.

 

One more thing for the dealer to check. Thx for helping me out

 

yeah man, good luck at the dealer and keep us posted on the outcome.

 

Dealer said this is normal..however, there's a hissing sound as the rpm goes up and drops down while the car is parked. Apparently there's a ECM update for it. Waiting to get the car back monday

 

I took my car in a couple months ago to get some work done and they had done an ECM update to mine, updated the brakes apparently there was a TSB on them and also did something else under warrenty.

 

Does it hiss when you switch from D to DS or M mode as well?

 

No only into and out of reverse

 

I have a loaner g37 2011 and it does have a really annoying rattle under hard acceleration... but no hssing

 

Mine does that q8y.

And to the OP. My car does hiss when in reverse. I've noticed that long time ago. Havent done anything bout it. I think its normal!