Dealership can't figure out flat tire
So I took my car in to the dealership to get my snow tires on (same rims). 3 days later TPMS is on and front right tire is a little low. Back to dealership. They claim the tire was installed wrong and the valve stem was damaged. Reinstalled tire, replaced stem. Off i go. 4 days later, tire flat. Back in. The dealership let it sit for 3 days and it didn't lose any air. They give it back to me. 3 days later.....you get the idea.
So, from what I can tell, the tire only loses pressure when driving, and it seems, that only when driving over certain speeds(around 85). I've had it for a week now, kept it under 80 and everything is fine.
Any ideas? Thanks.
2011 E92 AW M3 | NZH2 | 2MK | ZCP | ZP2 | ZCV | 494 | 6NR