[ddelfino]

So I picked up my car today and I am noticing ugly black dust all over the back of it. I am assuming its break dust blowing through the cooling vent and coming out the back of the vents? My car only had 6 miles so I doubt the breaks were broken in..?
Thoughts?

 

[glen e]

Probably not brake dust...

 

[NickJ]

Sounds like it may be running a little poorly. If the fuel mixture is off the car can blow soot out of the exhaust. This will likely remedy itself once you get some more miles on the car. The ECU is in a learning phase. It is adjusting your fueling and mixtures based on ambient temps, elevations, etc, etc.

 

[Redc7]

Or it could just be just dust kicked up from driving you can create a pretty good vortex back there.....

 

[Chip]

I think it is brake dust. What do the inside of the wheels look like? That will be the tell.

 

[M2MSTINGRAY]

I think its brake dust I have a white with black rims after I wash it go for a ride its all down the side that's the price for high performance brembo brakes.

 

[urrtoast]

Front Brakes dusting threw the side vents....lol tape them up see if it does it again