Enter Vehicle Year Make Model

Specify your vehicle's year, make and model to guarantee fit.

Year
Make
Model
Options
Drivetrain

2003 Mercury Grand Marquis Parts

What year is your
Free Same Day Shipping

2003 Mercury Grand Marquis

Filter Results
  • Notify When Available

    VIDEO

    Ignition Kit

    Replaces 2003 Mercury Grand Marquis Ignition Kit TRQ ICA71941

    58 reviews
    Brand: TRQ - ICA71941

    • Kit Includes: (8) Spark Plugs
    • Spark Plug Type: Iridium
    • Kit Includes: (8) Ignition Coils
    $129.95
    Save 20%
    List $162.95 Save $33.00

    Guaranteed to Fit 2003 Mercury Grand Marquis

    Guaranteed to Fit 2003 Mercury Grand Marquis

  • Notify When Available

    VIDEO

    Ignition Kit

    Replaces 2003 Mercury Grand Marquis 16 Piece Performance Ignition Kit TRQ Performance TKA05808

    32 reviews
    Brand: TRQ Performance - TKA05808

    • Kit Includes: (8) Spark Plugs
    • Quantity: 16 Piece
    • Ignition Coil Type: Performance
    • Ignition Coil Color: Red
    • Spark Plug Type: Iridium
    • Kit Includes: (8) Performance Ignition Coils
    $139.95
    Save 19%
    List $172.95 Save $33.00

    Guaranteed to Fit 2003 Mercury Grand Marquis

    Guaranteed to Fit 2003 Mercury Grand Marquis

  • Notify When Available
    Power Steering Pressure Switch

    Replaces 2003 Mercury Grand Marquis Power Steering Pressure Switch TRQ PSA75173

    1 reviews
    Brand: TRQ - PSA75173
    $29.95
    Save 9%
    List $32.95 Save $3.00

    Guaranteed to Fit 2003 Mercury Grand Marquis

    Guaranteed to Fit 2003 Mercury Grand Marquis

  • Notify When Available

    VIDEO

    98-11 Crown Victoria, Grand Marquis, Lincoln Towncar (w/o Air Susp) Suspension Kit (7pc)

    Replaces 2003 Mercury Grand Marquis Rear without Air Suspension 7 Piece Suspension Kit TRQ PSA63626

    7 reviews
    Brand: TRQ - PSA63626

    • Kit Includes: (2) Rear Sway Bar Links
    • Kit Includes: (2) Rear Upper Control Arms
    • Kit Includes: (2) Rear Lower Control Arms
    • Quantity: 7 Piece
    • Kit Includes: (1) Rear Watts Link Track Bar
    $134.95
    Save 29%
    List $189.95 Save $55.00

    Guaranteed to Fit 2003 Mercury Grand Marquis

    Guaranteed to Fit 2003 Mercury Grand Marquis

  • Notify When Available

    VIDEO

    Serpentine Belt Idler Pulley

    Replaces 2003 Mercury Grand Marquis Smooth Pulley Serpentine Belt Idler Pulley TRQ BPA04024

    3 reviews
    Brand: TRQ - BPA04024

    $26.95
    Save 21%
    List $33.95 Save $7.00

    Guaranteed to Fit 2003 Mercury Grand Marquis

    Guaranteed to Fit 2003 Mercury Grand Marquis

  • Notify When Available

    VIDEO

    Ignition Kit

    Replaces 2003 Mercury Grand Marquis 16 Piece Performance Ignition Kit TRQ Performance TKA05809

    15 reviews
    Brand: TRQ Performance - TKA05809

    • Kit Includes: (8) Spark Plugs
    • Quantity: 16 Piece
    • Kit Includes: (8) Ignition Coils
    • Ignition Coil Type: Performance
    • Ignition Coil Color: Blue
    • Spark Plug Type: Iridium
    $139.95
    Save 22%
    List $179.95 Save $40.00

    Guaranteed to Fit 2003 Mercury Grand Marquis

    Guaranteed to Fit 2003 Mercury Grand Marquis

  • Notify When Available

    VIDEO

    98-11 Crown Vic, Gr Marquis, Lincoln Towncar (w/o Air Susp) Rear Upper & Lower Control Arm Set (4pc)

    Replaces 2003 Mercury Grand Marquis Rear Driver & Passenger Side Upper & Lower without Air Suspension 4 Piece Control Arm Set TRQ PSA85154

    4 reviews
    Brand: TRQ - PSA85154

    • Quantity: 4 Piece
    • Kit Includes: (2) Rear Upper Control Arms
    • Kit Includes: (2) Rear Lower Control Arms
    $94.95
    Save 21%
    List $119.95 Save $25.00

    Guaranteed to Fit 2003 Mercury Grand Marquis

    Guaranteed to Fit 2003 Mercury Grand Marquis

  • Notify When Available

    VIDEO

    Kit image

    Replaces 2003 Mercury Grand Marquis V8 4.6L Downstream 2 Piece O2 Oxygen Sensor Set TRQ OSA61578

    14 reviews
    Brand: TRQ - OSA61578

    • Quantity: 2 Piece
    • Kit Includes: (2) Downstream O2 Oxygen Sensors
    $74.95
    Save 14%
    List $86.95 Save $12.00

    Guaranteed to Fit 2003 Mercury Grand Marquis

    Guaranteed to Fit 2003 Mercury Grand Marquis

  • Notify When Available

    VIDEO

    90-11 Lincoln Towncar; 92-11 Ford Crown Vict, Grand Marquis Rear Air Bag/Coil Spring Conversion

    Replaces 2003 Mercury Grand Marquis Rear Air Bag to Coil Spring Conversion Kit TRQ SKA63000

    16 reviews
    Brand: TRQ - SKA63000
    $104.95
    Save 15%
    List $123.95 Save $19.00

    Guaranteed to Fit 2003 Mercury Grand Marquis

    Guaranteed to Fit 2003 Mercury Grand Marquis

  • Notify When Available

    VIDEO

    90-05 Ford Lincoln Mercury Multifit Ignition Starter Switch

    Replaces 2003 Mercury Grand Marquis Ignition Switch TRQ SWA41719

    14 reviews
    Brand: TRQ - SWA41719
    $34.95
    Save 5%
    List $36.95 Save $2.00

    Guaranteed to Fit 2003 Mercury Grand Marquis

    Guaranteed to Fit 2003 Mercury Grand Marquis

1

...

1 2 3 4 5

...

51
Close



Mercury is a registered trademark of Ford Motor Company. 1A Auto is not affiliated with or sponsored by Mercury or Ford Motor Company. See all trademarks.
Same Day Shipping

Need your part faster? Choose expedited shipping at checkout.

Guaranteed To Fit

Highest quality, direct fit replacement auto parts enforced to the strictest product standards.

USA Customer Support

Exceeding customers' expectations, our team of passionate auto enthusiasts are here to help.

Instructional Video Library

Thousands of how-to auto repair videos to guide you step-by-step through your repair.

Go To Top
Specify your vehicle

Specify your vehicle's year, make and model to guarantee fit.

Year
Make
Model
Options
Drivetrain

If your vehicle isn't listed, close the window to return to search.