How to check and replace a thermostat in a cooling system issue on Ford Explorer?

Before attributing a cooling system issue to the thermostat, check coolant level, drivebelt tension, and temperature gauge or light. If engine has prolonged warm-up times, replace thermostat. For engine overheating, assess upper radiator hose temperature. Cool hose suggests stuck-closed thermostat, hot hose suggests open thermostat. To replace, disconnect battery cable, remove air duct, drain cooling system. Locate thermostat housing, loosen hose clamp, detach hose. Remove housing cover, extract old thermostat, clean surfaces, install new thermostat with proper orientation. Reassemble, refill cooling system, start engine to check for leaks and verify thermostat functionality.

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Engine Coolant Thermostat

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11 Thermostats found

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Ford Explorer Thermostat Assembly
Part Number: 1X4Z-8575-FA
- Other Name: Thermostat Assy
- Replaced by: 1X4Z-8575-B
$16.53 MSRP: $23.45
You Save: $6.92 (30%)

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Fits the following Vehicles:
2011-2019 Ford Explorer | 6 Cyl 3.5L Cyclone Petrol TIVCT, 6 Cyl 3.5L DOHC T/C, 6 Cyl 3.7L DOHC | 6-Speed Automatic Transmission 6F Mid-Range, 6-Speed Automatic Transmission 6F50, 6-Speed Automatic Transmission 6F55, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
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Ford Explorer Thermostat Assembly
Part Number: 7L3Z-8575-B
- Other Name: Thermostat Assy
- Replaced by: 7L3Z-8575-E
$21.78 MSRP: $30.91
You Save: $9.13 (30%)

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Fits the following Vehicles:
2002-2010 Ford Explorer | 8 Cyl 4.6L, 8 Cyl 4.6L Romeo SOHC EFI | 5-Speed Automatic Transmission 5R55S, 5-Speed Automatic Transmission 5R55W, 5-Speed Manual Transmission (M5R4), 6-Speed Automatic Transmission (6R80), 6-Speed Automatic Transmission 6R60, Four-Wheel Drive (Full Time) (Left Hand Drive), Four-Wheel Drive (Part Time) (Left Hand Drive), Four-Wheel Drive (Part Time) (Right Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Ford Explorer Thermostat Assembly
Part Number: 2L2Z-8575-AA
- Other Name: Thermostat Assy; Thermostat
- Replaces: 1L2Z-8575-AA
$17.67 MSRP: $28.18
You Save: $10.51 (38%)

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Fits the following Vehicles:
2002-2010 Ford Explorer | 6 Cyl 4.0L SOHC EFI | 5-Speed Automatic Transmission 5R55S, 5-Speed Automatic Transmission 5R55W, 5-Speed Manual Transmission (M5R4), 6-Speed Automatic Transmission (6R80), 6-Speed Automatic Transmission 6R60, Four-Wheel Drive (Full Time) (Left Hand Drive), Four-Wheel Drive (Part Time) (Left Hand Drive), Four-Wheel Drive (Part Time) (Right Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Ford Explorer Thermostat Assembly
Part Number: FR3Z-8575-A
- Other Name: Thermostat Assy; Thermostat, Thermostat Housing, Thermostat Unit
$40.81 MSRP: $65.09
You Save: $24.28 (38%)

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Fits the following Vehicles:
2016-2019 Ford Explorer | 4 Cyl 2.3L TIVCT DI TC | 6-Speed Automatic Transmission 6F Mid-Range, 6-Speed Automatic Transmission 6F50, 6-Speed Automatic Transmission 6F55, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
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Ford Explorer Thermostat Assembly
Part Number: CJ5Z-8575-A
- Other Name: Thermostat Assy; Thermostat, Thermostat Housing, Thermostat Unit
$42.98 MSRP: $68.55
You Save: $25.57 (38%)

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Fits the following Vehicles:
2013-2015 Ford Explorer | 4 Cyl 2.0L EcoBoost (240PS) | 6-Speed Automatic Transmission 6F Mid-Range, 6-Speed Automatic Transmission 6F50, 6-Speed Automatic Transmission 6F55, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
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Ford Explorer Thermostat Assembly
Part Number: AG9Z-8575-B
- Other Name: Thermostat Assy; Thermostat
$37.73 MSRP: $60.18
You Save: $22.45 (38%)

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Fits the following Vehicles:
2012-2013 Ford Explorer | 4 Cyl 2.0L EcoBoost (240PS) | 6-Speed Automatic Transmission 6F Mid-Range, 6-Speed Automatic Transmission 6F50, 6-Speed Automatic Transmission 6F55, Four-Wheel Drive (Full Time) (Left Hand Drive), Front-Wheel Drive (Left Hand Drive), Left Hand Drive
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Ford Explorer Thermostat Assembly
Part Number: F7TZ-8575-A
- Other Name: Thermostat Assy
- Manufacturer Note: Thermostat, SOHC
- Replaced by: YU3Z-8575-AA
$32.03 MSRP: $51.09
You Save: $19.06 (38%)

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Fits the following Vehicles:
1997-2001 Ford Explorer | 6 Cyl 4.0L | 4AT 4R70W, 5AT 5R55E, 5MT
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Ford Explorer Thermostat Assembly
Part Number: 1L2Z-8575-AA
- Other Name: Thermostat Assy
- Replaced by: 2L2Z-8575-AA
$17.67 MSRP: $28.18
You Save: $10.51 (38%)

Add to Cart
More Info
Fits the following Vehicles:
2002 Ford Explorer | 6 Cyl 4.0L SOHC EFI | 5-Speed Automatic Transmission 5R55S, 5-Speed Automatic Transmission 5R55W, 5-Speed Manual Transmission (M5R4), 6-Speed Automatic Transmission (6R80), 6-Speed Automatic Transmission 6R60, Four-Wheel Drive (Full Time) (Left Hand Drive), Four-Wheel Drive (Part Time) (Left Hand Drive), Four-Wheel Drive (Part Time) (Right Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Ford Explorer Thermostat Assembly
Part Number: XL2Z-8575-AB
- Other Name: Thermostat Assy
- Manufacturer Note: #XL2E 8575-AB (same as XL2Z 8575-AA, except new and improved jiggle pin), FROM 8/9/99
- Replaced by: XR3Z-8575-BA
$7.09 MSRP: $11.31
You Save: $4.22 (38%)

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Fits the following Vehicles:
1999-2001 Ford Explorer | 8 Cyl 5.0L | 4AT 4R70W, 5AT 5R55E, 5MT
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Ford Explorer Thermostat Assembly
Part Number: F2TZ-8575-A
- Other Name: Thermostat Assy
- Replaced by: YU3Z-8575-BA
$25.88 MSRP: $41.27
You Save: $15.39 (38%)

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More Info
Fits the following Vehicles:
1991-2001 Ford Explorer | 6 Cyl 4.0L | 4AT 4R44E, 4AT 4R55E, 4AT 4R70W, 4AT A4LD, 4AT AODE-E, 4AT AODE-W, 5AT 5R55E, 5MT
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Ford Explorer Thermostat Assembly
Part Number: AL2Z-8575-A
- Other Name: Thermostat Assy
- Replaced by: AL2Z-8575-B
More Info
Fits the following Vehicles:
2006-2010 Ford Explorer | 6 Cyl 4.0L SOHC EFI | 5-Speed Automatic Transmission 5R55S, 5-Speed Automatic Transmission 5R55W, 5-Speed Manual Transmission (M5R4), 6-Speed Automatic Transmission (6R80), 6-Speed Automatic Transmission 6R60, Four-Wheel Drive (Full Time) (Left Hand Drive), Four-Wheel Drive (Part Time) (Left Hand Drive), Four-Wheel Drive (Part Time) (Right Hand Drive), Left Hand Drive, Rear-Wheel Drive (Left Hand Drive)
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Ford Explorer Thermostat Parts Questions & Answers

Thermostat Assembly
F7TZ-8575-A
Q: How to check and replace a thermostat in a cooling system issue on Ford Explorer?
A: Before attributing a cooling system issue to the thermostat, check coolant level, drivebelt tension, and temperature gauge or light. If engine has prolonged warm-up times, replace thermostat. For engine overheating, assess upper radiator hose temperature. Cool hose suggests stuck-closed thermostat, hot hose suggests open thermostat. To replace, disconnect battery cable, remove air duct, drain cooling system. Locate thermostat housing, loosen hose clamp, detach hose. Remove housing cover, extract old thermostat, clean surfaces, install new thermostat with proper orientation. Reassemble, refill cooling system, start engine to check for leaks and verify thermostat functionality.