So I'm sitting at a red light today and I noticed when looking into my rear view mirror it looks like a drill is going off near by and my rear view mirror is kind of rumbling (maybe due to the fact of my engine?) not sure but what also scares me is when I put it in drive last night from park to reverse to drive it like gave me a last minute jerk and jerked into gear...I also notice my rpms sit at like 500 (half of 1) while I'm in park is that normal?

 

Not normal at all.

 

Is your rpm fluttering when at a light? Im guessing your going to get an engine light soon. Hopefully it is a sensor or something. But This started happening to my car, and they ended up replacing most of the motor!!! The good news is your under warranty so at the end of the day whatever happens its no big deal.