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Ford 4L5Z-8575-B Thermostat Unit

2004-2013 Ford 4L5Z8575B

Customer Questions & Expert Answers (4)
4L5Z-8575-B Ford Thermostat Unit Product Photo 1 of 4
4L5Z-8575-B Ford Thermostat Unit Product Photo 1 of 4
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4L5Z-8575-B Ford Thermostat Unit Illustration 1 of 1
  • Part Description
    Thermostat Assembly
  • Base No.
    8575
  • Replaces
    4L5Z-8575-A, 4L5Z-8575-AA, 4L5Z-8575-AD
  • Manufacturer
    Ford
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  • Specifications
  • Fitment
  • Q&A

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  • Product Specifications

    BrandGenuine Ford
    Base No.8575
    Manufacturer Part Number4L5Z-8575-B, 4L5Z8575B
    Part DescriptionThermostat Unit; Thermostat Assembly
    Item Dimensions8.4 x 7.7 x 7.7 inches
    Item Weight0.90 Pounds
    ConditionNew
    Fitment TypeDirect Replacement
    Replaces4L5Z-8575-A, 4L5Z-8575-AA, 4L5Z-8575-AD
    ManufacturerFord
    SKU4L5Z-8575-B
    WarrantyThis genuine Ford part is guaranteed by Ford's factory warranty.
    Shipping & ReturnShipping Policy Return Policy
    Warning: California's Proposition 65

  • Vehicle Fitment

    Year Make Model Engine Important vehicle option details
    2008, 2005-2006 Ford Escape4 Cyl 2.3L4AT CD4E, 5-Speed Manual Transmission, 5-Speed Manual Transmission - AK, 6-Speed Automatic Transmission 6F Mid-Range, CVT Auto Trans Powersplit Elec, Four-Wheel Drive (Full Time) (Left Hand Drive), Four-Wheel Drive (Right Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive, Two-Wheel Drive (Left Hand Drive), Two-Wheel Drive (Right Hand Drive)
    2004-2006 Ford Ranger4 Cyl 2.3L NA Petrol5-Speed Automatic Transmission - 5R44E/5R55E, 5-Speed Manual Transmission - R1HD, 5-Speed Manual Transmission M5R1, Four-Wheel Drive (Part Time) (Left Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
    2010-2013 Ford Transit Connect4 Cyl 2.0L Duratec HE1-Speed Transmission, 4-Speed Automatic Transaxle - 4F27E, Front-Wheel Drive (Left Hand Drive), Front-Wheel Drive (Right Hand Drive), Left Hand Drive
    2008, 2005-2006 Mercury Mariner4 Cyl 2.3L4AT CD4E, 5-Speed Manual Transmission, 5-Speed Manual Transmission - AK, 6-Speed Automatic Transmission 6F Mid-Range, CVT Auto Trans Powersplit Elec, Four-Wheel Drive (Full Time) (Left Hand Drive), Four-Wheel Drive (Right Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive, Two-Wheel Drive (Left Hand Drive), Two-Wheel Drive (Right Hand Drive)

  • Customer Questions & Expert Answers

    Q:
    Is this the correct part for the attached VIN?
    A:
    You can Select Your Vehicle to check if 4L5Z-8575-B fits your vehicle.
    Posted and answered by Ford Parts Specialist Matthew
    Q:
    What should be done if the lower radiator hose is hot and the Thermostat is not functioning properly for the 2008 Ford Escape? Posted by Joncy C.
    A:
    If the lower radiator hose is hot, it indicates that the thermostat is open. In this case, further cooling system diagnosis should be made. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by Ford Parts Specialist Joseph / May 25, 2024
    Q:
    How can the Thermostat be replaced for the 2008 Mercury Mariner? Posted by Virgil M.
    A:
    To replace the thermostat, first disconnect the battery cable and drain the cooling system, saving the coolant if it's in good condition. Then, locate the thermostat housing, loosen the hose clamp, and detach the hose. If the thermostat housing cover is corroded, it should be replaced. For 2.3L and 2.5L engines, disconnect the heater hose and remove the fasteners to access the thermostat. Note its orientation, remove it, and clean the gasket surfaces. Install a new rubber gasket on the thermostat and install it in the housing with the jiggle valve at 12 o'clock. For paper gaskets, wet it with water and align it with the bolt holes. Reattach the housing cover, tighten the bolts, and reconnect the radiator hose. Finally, refill the cooling system, reconnect the battery, and allow the engine to reach normal operating temperature to check for leaks and proper thermostat operation. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by Ford Parts Specialist Don / Apr 11, 2025
    Q:
    Does this thermostat come with a gasket? Posted by Larry S. / 2010 Ford Transit Connect
    A:
    yes
    Answered by Ford Parts Specialist Joseph / Sep 24, 2024

Genuine Ford Part 4L5Z-8575-B, the Right Choice

To ensure reliability, purchase part # 4L5Z-8575-B Thermostat Unit. It is also called Thermostat. OEM parts are of high quality and known for their longevity. This is because they are built to the Ford standards which are relatively high and undergo rigorous quality control testing. This part fits specific Ford Escape, Ranger, Transit Connect models. It fits Mercury Mariner.

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