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Make sure this part fits

Ford YS4Z-8575-AA Thermostat Assembly

1999-2004 Ford YS4Z8575AA

Customer Questions & Expert Answers (3)
YS4Z-8575-AA Ford Thermostat Assembly Product Photo 1 of 4
YS4Z-8575-AA Ford Thermostat Assembly Product Photo 1 of 4
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YS4Z-8575-AA Ford Thermostat Assembly Illustration 1 of 1
  • Part Description
    Thermostat Assy
  • Replaced By
    KU2Z-8575-A
  • Manufacturer
    Ford
  • Manufacturer's Notes
    This part is discontinued.
Make sure this part fits
  • Related Parts
  • Specifications
  • Fitment
  • Q&A

  • Related Parts

    Shop for related parts for your vehicle

  • Product Specifications

    BrandGenuine Ford
    Manufacturer Part NumberYS4Z-8575-AA, YS4Z8575AA
    Part DescriptionThermostat Assy
    Item Dimensions3.1 x 1.6 x 2.6 inches
    Item Weight0.50 Pounds
    ConditionNew
    Fitment TypeDirect Replacement
    ManufacturerFord
    SKUYS4Z-8575-AA
    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
    2000-2004 Ford Focus4 Cyl 2.0L, 4 Cyl 2.0L CVH EFI4AT 4F27E, 4-Speed Automatic Transaxle - 4F27E, 5MT, 5-Speed Manual Transmission - B5/IB5, 5-Speed Manual Transmission - MTX75, 6MT, 6-Speed Manual Transmission, Front-Wheel Drive (Left Hand Drive), Left Hand Drive
    1999-2001 Ford Ranger4 Cyl 2.5L4AT 4R44E, 5AT 5R44E, 5AT 5R55E, 5MT

  • Customer Questions & Expert Answers

    Q:
    Will these fit my car and if not which part will? Thank you.
    A:
    You can Select Your Vehicle to check if YS4Z-8575-AA fits your vehicle.
    Posted and answered by Ford Parts Specialist Jack
    Q:
    How can a stuck-open Thermostat be identified for the 2001 Ford Ranger? Posted by Pam G.
    A:
    If the engine takes an unusually long time to warm up, possibly indicated by heater performance or temperature gauge behavior, a stuck-open thermostat may be the issue. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by Ford Parts Specialist John / Jan 21, 2025
    Q:
    What should be done if the Thermostat is stuck open for the 2001 Ford Ranger? Posted by Sherri D.
    A:
    It should be replaced. You can Select Your Vehicle to see complete installation and repair tips.
    Answered by Ford Parts Specialist Clayton / Apr 10, 2026

Genuine Ford Part YS4Z-8575-AA, the Right Choice

To ensure reliability, purchase part # YS4Z-8575-AA Thermostat Assembly. 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 Focus, Ranger models.

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