Hello, maybe someone can help me interpret the 15 year SULEV warranty on my 2010 128i. I recently had a new secondary air pump and valve put in under warranty, which did not resolve the check engine light. I took it back, and my service adviser is now telling me they believe the fault code is caused by a buildup of carbon in the cylinder head. The repair estimate is $4300. I had hoped to keep the car another two years, but I'm not going to put that much into a car that's only worth $6000-$7000. Before I start calling independents or shopping for a new car, this is what the warranty documentation says: 1. If your vehicle fails a Smog Check inspection, all necessary repairs and adjustments will be made by BMWNA to ensure that your vehicle passes the inspection. This is your emission control system PERFORMANCE WARRANTY." 2. If any emission-related part on your vehicle is defective, the part will be repaired or replaced by BMWNA. This is your emission control system DEFECTS WARRANTY. I interpret this as a two-part warranty, one that covers the individual parts in the SULEV parts list, and one that covers a failed emissions test. This problem will cause me to fail an emissions test, so I thought I may be covered under the first part of the warranty. Does anyone know what happens if the part that causes you to fail an emissions test is not actually an emissions control part? The dealer tells me I have to get approval from BMW, and BMW tells me it's up to the service manager. What's even more frustrating is that some research turns up two instances of SULEV owners with the exact same issue getting a cylinder head replacement covered under this warranty. If I can prove that it was covered for someone else, my dealer will take care of it. But I don't know who to reach out to, or if there's a way for BMWNA to tell me if a specific repair has been covered in the past. I've PM'd the e90post users who claim to have gotten this repair covered, but haven't heard back. If anyone can suggest what to do next, it would be greatly appreciated. Thanks.