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 2003 Mercury Grand Marquis, both ongoing and closed, are listed below:

  1. INVESTIGATION: SPARK PLUG EJECTION FROM CYLINDER HEAD

    NHTSA #DP05005

    Status:
    CLOSED

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  2. INVESTIGATION: Loss of headlights

    NHTSA #PE15028

    Status:
    RECALLED

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  4. INVESTIGATION: Loss of headlamp/exterior lighting

    NHTSA #DP15002

    Status:
    CLOSED

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  5. INVESTIGATION: LOSS OF HEADLIGHT FUNCTION

    NHTSA #PE08066

    Status:
    CLOSED

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  6. INVESTIGATION: REAR AXLE FRACTURE

    NHTSA #PE04010

    Status:
    RECALLED

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  7. INVESTIGATION: FRACTURE OF THE STEEL WHEEL RIM

    NHTSA #PE03009

    Status:
    RECALLED

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