Tl* the contact owns a 2007 maserati quattroporte. while driving 55 mph, the vehicle decelerated and seized without warning. the contact took the vehicle to an independent mechanic where a diagnostic test was performed, but the cause of the failure could not be determined. the vehicle was not repaired. maserati of seattle (1401 12th ave, seattle, wa 98122, (206)-329-7070) was contacted to schedule an appointment for a second diagnostic test. the manufacturer was made aware of the failure and did not assist. the failure recurred. the failure mileage was 150,000.