what is your model/tire air pressure? i believe the 545, 530, and 525 all have different specs for tire pressure.

in hwy driving, my car seems to sway..just like driving in high winds. i wondering if it's my tire pressure, alignment, or run flat tires.


530 35f, 40r

 

We had a long investigation of this topic recently. It is truly confusing based on the label on the driver's door post. However if you do a search, you may find the thread.

try this thread:

http://forums.e60.net/index.php?showtopic=2859&hl=

 

I keep mine at the 32/38 posted on the plate in the door frame. At most I have my wife and two small kids in the car, vast majority of the time, just me. I'm running a non-sport 545, so using the 225/50 R17 tires. I've never felt any sort of swaying in my car at highway speeds. Do a search as I have seen discussions about the feel of AS at highway speeds. I know the guys will correct me on this but wasn't there an issue with very early version of the AS that were corrected? Can't recall how your car is Ethanbmw, or if it was simply a software issue though.