Enter Vehicle Year Make Model

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

Year
Make
Model
Options
Drivetrain

2003 Mercury Mountaineer Heating & Cooling

What year is your
Free Same Day Shipping

2003 Mercury Mountaineer Heating & Cooling

Filter Results
  • Notify When Available
    Thermostat with Housing Assembly

    Replaces 2003 Mercury Mountaineer V6 4.0L Thermostat with Housing Assembly TRQ ECA90655

    6 reviews
    Brand: TRQ
    - ECA90655

    • Includes: Gasket
    $64.95
    Save 25%
    List $86.95 Save $22.00

    Guaranteed to Fit 2003 Mercury Mountaineer

    Guaranteed to Fit 2003 Mercury Mountaineer

    Replaces 2003 Mercury Mountaineer V6 4.0L Thermostat with Housing Assembly TRQ ECA90655

    Thermostat with Housing Assembly
    6 reviews
    Brand: TRQ - ECA90655
    • Includes: Gasket
    $64.95
    Save 25%
    List $86.95 Save $22.00

    Guaranteed to Fit 2003 Mercury Mountaineer

    Guaranteed to Fit 2003 Mercury Mountaineer

  • Notify When Available
    02-05 Ford Explorer, Mercury Mountaineer A/C Condenser

    Replaces 2003 Mercury Mountaineer A/C Condenser TRQ ACA84405

    2 reviews
    Brand: TRQ
    - ACA84405

    $87.95
    Save 12%
    List $99.95 Save $12.00

    Guaranteed to Fit 2003 Mercury Mountaineer

    Guaranteed to Fit 2003 Mercury Mountaineer

    Replaces 2003 Mercury Mountaineer A/C Condenser TRQ ACA84405

    02-05 Ford Explorer, Mercury Mountaineer A/C Condenser
    2 reviews
    Brand: TRQ - ACA84405
    $87.95
    Save 12%
    List $99.95 Save $12.00

    Guaranteed to Fit 2003 Mercury Mountaineer

    Guaranteed to Fit 2003 Mercury Mountaineer

  • Notify When Available

    VIDEO

    Radiator

    Replaces Radiator TRQ RDA82629

    23 reviews
    Brand: TRQ
    - RDA82629

    $114.95
    Save 17%
    List $137.95 Save $23.00

    Guaranteed to Fit 2003 Mercury Mountaineer

    Guaranteed to Fit 2003 Mercury Mountaineer

    Replaces Radiator TRQ RDA82629

    VIDEO

    Radiator
    23 reviews
    Brand: TRQ - RDA82629
    $114.95
    Save 17%
    List $137.95 Save $23.00

    Guaranteed to Fit 2003 Mercury Mountaineer

    Guaranteed to Fit 2003 Mercury Mountaineer

  • Notify When Available

    VIDEO

    Blower Motor Control Switch

    Replaces 2003 Mercury Mountaineer with Manual Air Conditioning Blower Motor Control Switch TRQ HCA41510

    Brand: TRQ
    - HCA41510
    $20.95
    Save 40%
    List $34.95 Save $14.00

    Guaranteed to Fit 2003 Mercury Mountaineer

    Guaranteed to Fit 2003 Mercury Mountaineer

    Replaces 2003 Mercury Mountaineer with Manual Air Conditioning Blower Motor Control Switch TRQ HCA41510

    VIDEO

    Blower Motor Control Switch
    Brand: TRQ - HCA41510
    $20.95
    Save 40%
    List $34.95 Save $14.00

    Guaranteed to Fit 2003 Mercury Mountaineer

    Guaranteed to Fit 2003 Mercury Mountaineer

  • Notify When Available

    VIDEO

    02-10 Explorer, Mountaineer; 07-10 Sport Trac w/4.0L Thermostat Housing

    Replaces 2003 Mercury Mountaineer V6 4.0L Upper & Lower Thermostat with Housing Assembly TRQ ECA92798

    33 reviews
    Brand: TRQ
    - ECA92798

    $43.95
    Save 24%
    List $57.95 Save $14.00

    Guaranteed to Fit 2003 Mercury Mountaineer

    Guaranteed to Fit 2003 Mercury Mountaineer

    Replaces 2003 Mercury Mountaineer V6 4.0L Upper & Lower Thermostat with Housing Assembly TRQ ECA92798

    VIDEO

    02-10 Explorer, Mountaineer; 07-10 Sport Trac w/4.0L Thermostat Housing
    33 reviews
    Brand: TRQ - ECA92798
    $43.95
    Save 24%
    List $57.95 Save $14.00

    Guaranteed to Fit 2003 Mercury Mountaineer

    Guaranteed to Fit 2003 Mercury Mountaineer

  • Notify When Available

    VIDEO

    2002-10 Ford Explorer Mountaineer AC Door Actuator

    Replaces 2003 Mercury Mountaineer with Manual Air Conditioning HVAC Blend Door Actuator TRQ HCA40131

    17 reviews
    Brand: TRQ
    - HCA40131

    $40.95
    Save 11%
    List $45.95 Save $5.00

    Guaranteed to Fit 2003 Mercury Mountaineer

    Guaranteed to Fit 2003 Mercury Mountaineer

    Replaces 2003 Mercury Mountaineer with Manual Air Conditioning HVAC Blend Door Actuator TRQ HCA40131

    VIDEO

    2002-10 Ford Explorer Mountaineer AC Door Actuator
    17 reviews
    Brand: TRQ - HCA40131
    $40.95
    Save 11%
    List $45.95 Save $5.00

    Guaranteed to Fit 2003 Mercury Mountaineer

    Guaranteed to Fit 2003 Mercury Mountaineer

  • Notify When Available

    VIDEO

    02-11 Ford Lincoln Mercury SUV Mode Door Actuator for Rear Unit

    Replaces 2003 Mercury Mountaineer Rear HVAC Blend Door Actuator TRQ HCA40142

    6 reviews
    Brand: TRQ
    - HCA40142

    $38.95
    Save 11%
    List $43.95 Save $5.00

    Guaranteed to Fit 2003 Mercury Mountaineer

    Guaranteed to Fit 2003 Mercury Mountaineer

    Replaces 2003 Mercury Mountaineer Rear HVAC Blend Door Actuator TRQ HCA40142

    VIDEO

    02-11 Ford Lincoln Mercury SUV Mode Door Actuator for Rear Unit
    6 reviews
    Brand: TRQ - HCA40142
    $38.95
    Save 11%
    List $43.95 Save $5.00

    Guaranteed to Fit 2003 Mercury Mountaineer

    Guaranteed to Fit 2003 Mercury Mountaineer

  • Notify When Available
    Coolant Reservoir

    Replaces 2003 Mercury Mountaineer Coolant Reservoir TRQ ECA62541

    Brand: TRQ
    - ECA62541

    $64.95
    Save 21%
    List $81.95 Save $17.00

    Guaranteed to Fit 2003 Mercury Mountaineer

    Guaranteed to Fit 2003 Mercury Mountaineer

    Replaces 2003 Mercury Mountaineer Coolant Reservoir TRQ ECA62541

    Coolant Reservoir
    Brand: TRQ - ECA62541
    $64.95
    Save 21%
    List $81.95 Save $17.00

    Guaranteed to Fit 2003 Mercury Mountaineer

    Guaranteed to Fit 2003 Mercury Mountaineer

  • Notify When Available
    Blower Motor Resistor

    Replaces 2003 Mercury Mountaineer Front without Automatic Temperature Control Blower Motor Resistor TRQ HCA40004

    1 reviews
    Brand: TRQ
    - HCA40004
    $34.95
    Save 19%
    List $42.95 Save $8.00

    Guaranteed to Fit 2003 Mercury Mountaineer

    Guaranteed to Fit 2003 Mercury Mountaineer

    Replaces 2003 Mercury Mountaineer Front without Automatic Temperature Control Blower Motor Resistor TRQ HCA40004

    Blower Motor Resistor
    1 reviews
    Brand: TRQ - HCA40004
    $34.95
    Save 19%
    List $42.95 Save $8.00

    Guaranteed to Fit 2003 Mercury Mountaineer

    Guaranteed to Fit 2003 Mercury Mountaineer

  • Notify When Available
    02-10 Ford Explorer, Mountaineer; 03-05 Lincoln Aviator Aux Vent Door Actuator

    Replaces 2003 Mercury Mountaineer Auxiliary Heater HVAC Blend Door Actuator TRQ HCA40129

    2 reviews
    Brand: TRQ
    - HCA40129

    $32.95
    Save 34%
    List $49.95 Save $17.00

    Guaranteed to Fit 2003 Mercury Mountaineer

    Guaranteed to Fit 2003 Mercury Mountaineer

    Replaces 2003 Mercury Mountaineer Auxiliary Heater HVAC Blend Door Actuator TRQ HCA40129

    02-10 Ford Explorer, Mountaineer; 03-05 Lincoln Aviator Aux Vent Door Actuator
    2 reviews
    Brand: TRQ - HCA40129
    $32.95
    Save 34%
    List $49.95 Save $17.00

    Guaranteed to Fit 2003 Mercury Mountaineer

    Guaranteed to Fit 2003 Mercury Mountaineer

1

...

1 2 3

...

3
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.