After my tire pressure warning kept coming on. After the first check pressure was down to about 25psi. Filled it with air back to 32 psi. A week later, the same thing. Went through this cycle one more time and got fed up. Took it to the dealer since I do have the warranty, and they verified that a nail was in the tire, and that they couldn't repair it - the tire had to be replaced. Tire type was a Bridgestone Dueller 400 RFT. Cost to replace, approx. USD 335. Warrant company (separate from BMW) refunded me about USD323 after I filled a claim. Oh, you have to get an authorization number from the company before the replacement, which my dealer did. Oh, and the amount of thread remaining on the tire was reported and required by the warranty company. I have about 29000 miles on the 2007 3.0si 11/06 build. That's have the warranty deal works.

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