Originally Posted by mattmarcus
This has been bugging me more and more lately and I'm hoping someone has some advice. I've got 1500 miles on my '12 skyactiv sedan. Since leaving the dealer the car is drifting left at highway speeds. I had a JB RSB put on a few weeks ago and had the shop do a full align. They said the rear was off but the front was fine. I've gone on several longer drives recently and the car is still drifting left at speeds over 50. It's there at lower speeds, but not terribly noticeable. Tires are all ~36psi.
Any advice? I don't want to go to the dealer and have them just check the alignment, since it seems to be in aligned, and I don't want them to blame on it on the RSB, but I gave up my old miata for the 3 because the handling was supposed to be good -- so far this is a disappointment, I spend too much effort on the highway just staying in my lane to enjoy the drive.
I would take it to the dealer and have them drive it. It's a warranty issue and they would have to fix it unless they could prove that your RSB is causing the problem (which it doesn't sound like it is). For warranty work, it's the dealer's job to figure out what the problem is and fix it. It could be a defective wheel or tire, or your left front brake dragging or who knows?