The Office of Defects Investigations (ODI) is an office within the NHTSA which investigates serious safety problems in the design, construction or performance of vehicles. The NHTSA is authorized to order manufacturers to recall and repair vehicles, if the ODI finds a safety issue. NHTSA investigations for the 1998 Mercury Grand Marquis, both ongoing and closed, are listed below:

1. INVESTIGATION: SPARK PLUG EJECTION FROM CYLINDER HEAD

   NHTSA #DP05005

   Status:

   CLOSED

   Click here for more info »

2. INVESTIGATION: POST REAR END COLLISION FIRES

   NHTSA #SQ01014

   Status:

   RECALLED

   Click here for more info »

4. INVESTIGATION: FUEL-FED FIRES

   NHTSA #DP02007

   Status:

   CLOSED

   Click here for more info »