TL* THE CONTACT OWNS A 2003 BMW 325XI. WHEN TURNING THE IGNITION OFF, AN ABNORMAL NOISE EMITTED FROM THE FRONT OF THE VEHICLE. THE CONTACT OBSERVED SMOKE COMING FROM THE HOOD OF THE VEHICLE. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC, WHO DIAGNOSED THAT THE EXPANSION TANK NEEDED TO BE REPLACED. THE VEHICLE WAS REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 103,000.