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cold start roaring sound

  1. Cold Start roaring tubo sound

    New Members Area
    I've had my 2009 Passion for 3 years and have 35,000 plus miles and recently I have noticed when I start my Smart Car in the mornings it has a winding roaring turbo sound that lasts 15-20 seconds. I was wondering if anyone else has noticed their car doing the same or if anyone has had this issue...