Agree with SG. The dealers I've done business with all outsource the windshield replacement jobs. When I replaced the windshield on my 5 series, the installer gave me a choice of the BMW factory glass for ~$550 or the same (minus the BMW logo) windshield from the company that makes the factory unit for ~$300. I wasn't filing an insurance claim either way as we have a $500 deductible. However, the installer also said that some insurance companies insist on BMW glass. No way to know until you make the call.