# 2008 BMW 335xi backfires

**URL:** <https://community.cartalk.com/t/2008-bmw-335xi-backfires/54914>\
**Category:** Maintenance/Repairs\
**Tags:** bmw, 335\
**Created:** [September 10, 2010, 3:46pm UTC](https://community.cartalk.com/t/2008-bmw-335xi-backfires/54914 "2010-09-10T15:46:13Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![bmw-help](https://avatars.discourse-cdn.com/v4/letter/b/898d66/32.png) [@bmw-help](https://community.cartalk.com/u/bmw-help)\
**Post date:** [September 10, 2010, 3:46pm UTC](https://community.cartalk.com/t/2008-bmw-335xi-backfires/54914/1 "2010-09-10T15:46:13Z")

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My 2008 BMW 335xi backfires when it is cold. There appears to be nothing else wrong with the car and the dealer’s service department has told me on various visits: we can’t reproduce it; or it is “normal”; it’s a turbo and runs rich so typical; or this other new BMW on the lot does the same thing so it’s expected. The backfire only happens when the engine is cold, but EVERY time it is cold. I just had the exhaust replaced because the backfire damaged it. The service department is sick of seeing me and does not have an answer. My car is still under warranty.