How to service the thermostat on a 4.0L SOHC engine on Ford Mustang?

Draining the cooling system should be the first step before servicing the thermostat on a 4.0L SOHC engine. First disconnect the air cleaner outlet pipe before removing the throttle body. Disassemble the thermostat housing by removing its upper three bolts before putting it aside while removing the worn O-ring seal. The installation process requires tightening the new thermostat to 10 Nm (89 inch lbs.) while placing a new O-ring seal that needs lubrication with clean engine coolant. Beginning with the removal procedure in the opposite order will allow a.correct installation of the thermostat and proper completion of cooling system fill and bleeding procedures.

OEM Ford Mustang Thermostat

Engine Coolant Thermostat

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17 Thermostats found

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Ford Mustang Thermostat
Part Number: 7L3Z-8575-E
$20.68 MSRP: $32.00
You Save: $11.32 (36%)
Ships in 1 Business Day
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Product Specifications
- Other Name: Thermostat Assembly; Engine Coolant Thermostat; Thermostat, Coolant
- Replaces: 7L3Z-8575-D, 7L3Z-8575-B, AL3Z-8575-B, RT-1196, RT-1230, 3L3Z-8575-AA, 3L3Z-8575-AC, 7L3Z-8575-C, AL3Z-8575-A, RT-1204, RT-1234, RT-1178, RT-1229, RT-1165
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2007-2010, 1996-2004 Ford Mustang | Bullitt, GT, GT Bullitt, Shelby GT | 8 Cyl 4.6 L GAS
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Ford Mustang Thermostat
Part Number: 7R3Z-8575-B
$43.57 MSRP: $69.18
You Save: $25.61 (38%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Thermostat Assembly; Engine Coolant Thermostat
- Replaces: 7R3Z-8575-A, RT-1185
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2007-2014 Ford Mustang | Shelby GT500, Shelby GT500KR | 8 Cyl 5.4 L GAS, 8 Cyl 5.8 L GAS
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Ford Mustang Thermostat
Part Number: 2C5Z-8575-AA
$12.48 MSRP: $19.82
You Save: $7.34 (38%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Thermostat Assembly; Engine Coolant Thermostat
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2006 Ford Mustang | GT | 8 Cyl 4.6 L GAS
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Ford Mustang Thermostat Housing
Part Number: FR3Z-8575-A
$40.52 MSRP: $64.35
You Save: $23.83 (38%)
Ships in 1 Business Day
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Product Specifications
- Other Name: Thermostat Assembly; Engine Coolant Thermostat Kit; Thermostat Housing Cover; Thermostat Unit; Thermostat; Engine Coolant Thermostat
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2015-2023 Ford Mustang | EcoBoost, EcoBoost Premium | 4 Cyl 2.3 L GAS
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Ford Mustang Thermostat
Part Number: F5OY-8575-A
$12.85 MSRP: $20.40
You Save: $7.55 (38%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Thermostat Assembly
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2001-2003, 1996-1999 Ford Mustang | GT, SVT Cobra | 8 Cyl 4.6 L GAS
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Ford Mustang Thermostat Housing
Part Number: BR3Z-8A586-N
$161.17 MSRP: $255.93
You Save: $94.76 (38%)
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Product Specifications
- Other Name: Connection Water Outlet; Engine Coolant Thermostat Kit; Thermostat Housing Cover; Thermostat Unit
- Replaces: BR3Z-8A586-K, BR3Z-8A586-L, BR3Z-8A586-M, BR3Z-8592-A
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2011-2024 Ford Mustang | Boss 302, Bullitt, Dark Horse, Dark Horse Premium, GT, GT 50 Years Limited Edition, GT Premium, Mach 1, Shelby GT350, Shelby GT350R, Shelby GT500 | 8 Cyl 5.0 L GAS, 8 Cyl 5.2 L GAS
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Ford Mustang Thermostat
Part Number: 2L2Z-8575-AA
$19.85 MSRP: $31.53
You Save: $11.68 (38%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Thermostat Assembly; Engine Coolant Thermostat
- Replaces: 1L2Z-8575-AA
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2005-2010 Ford Mustang | Base | 6 Cyl 4.0 L GAS
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Ford Mustang Thermostat
Part Number: KU2Z-8575-A
$7.93 MSRP: $10.79
You Save: $2.86 (27%)
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Product Specifications
- Other Name: Thermostat Assembly; Engine Coolant Thermostat
- Replaces: F8CZ-8575-AA, F6TZ-8575-AC, YS4Z-8575-AA
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1992-1993 Ford Mustang | LX | 4 Cyl 2.3 L GAS
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Ford Mustang Thermostat
Part Number: BR3Z-8575-G
$23.85 MSRP: $36.91
You Save: $13.06 (36%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Other Name: Thermostat Assembly; Engine Coolant Thermostat
- Replaces: BR3Z-8575-D, RT-1208, BR3Z-8575-A, RT-1225
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2011-2024 Ford Mustang | Boss 302, Bullitt, Dark Horse, Dark Horse Premium, GT, GT 50 Years Limited Edition, GT Premium, Mach 1, Shelby GT350, Shelby GT350R, Shelby GT500 | 8 Cyl 5.0 L GAS, 8 Cyl 5.2 L GAS
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Ford Mustang Thermostat
Part Number: BC3Z-8575-E
$41.00 MSRP: $63.98
You Save: $22.98 (36%)
ADD TO CART
Product Specifications
- Other Name: Thermostat Assembly; Engine Coolant Thermostat
- Replaces: BC3Z-8575-A, RT-1231, RT-1205, BC3Z-8575-D
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2020-2022 Ford Mustang | Shelby GT500 | 8 Cyl 5.2 L GAS
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Ford Mustang Thermostat
Part Number: P2GZ-8575-A
$35.24 MSRP: $55.00
You Save: $19.76 (36%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Thermostat Assembly
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2024 Ford Mustang | EcoBoost, EcoBoost Premium | 4 Cyl 2.3 L GAS
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Ford Mustang Thermostat
Part Number: GR3Z-8575-A
$62.35 MSRP: $99.00
You Save: $36.65 (38%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Thermostat Assembly
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2024 Ford Mustang | Dark Horse, Dark Horse Premium, GT, GT Premium | 8 Cyl 5.0 L GAS
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Ford Mustang Thermostat
Part Number: YF1Z-8575-BA
$9.94 MSRP: $15.38
You Save: $5.44 (36%)
Product Specifications
- Other Name: Thermostat Assembly; Engine Coolant Thermostat
- Replaces: F58Z-8575-A, F5DZ-8575-A
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1994-1995 Ford Mustang | Base | 6 Cyl 3.8 L GAS
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Ford Mustang Thermostat
Part Number: XR3Z-8575-BA
$7.31 MSRP: $11.31
You Save: $4.00 (36%)
Product Specifications
- Other Name: Thermostat Assembly; Engine Coolant Thermostat
- Manufacturer Note: Thermostat 192 #XR3E 8597-BA
- Replaces: F88Z-8575-AA, E8TZ-8575-A, XL2Z-8575-AB
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1992-1995 Ford Mustang | GT, GTS, LX, SVT Cobra, SVT Cobra R | 8 Cyl 5.0 L GAS
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Ford Mustang Thermostat
Part Number: KU2Z-8575-B
Product Specifications
- Other Name: Thermostat Assembly; Engine Coolant Thermostat
- Replaces: F6DZ-8575-AA, F6ZZ-8575-A, F8DZ-8575-AA
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 1996-2004 Ford Mustang | Base | 6 Cyl 3.8 L GAS, 6 Cyl 3.9 L GAS
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Ford Mustang Thermostat
Part Number: BL3Z-8575-B
$21.57 MSRP: $33.38
You Save: $11.81 (36%)
Product Specifications
- Other Name: Thermostat Assembly; Engine Coolant Thermostat
- Replaces: BL3Z-8575-A, RT-1213
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2011-2017 Ford Mustang | Base, V6 | 6 Cyl 3.7 L GAS
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Ford Mustang Thermostat
Part Number: F5OZ-8575-AA
Product Specifications
- Other Name: Thermostat Assembly
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2003-2004 Ford Mustang | GT, Mach 1, SVT Cobra, SVT Cobra 10th Anniversary | 8 Cyl 4.6 L GAS

Ford Mustang Thermostat

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Ford Mustang Thermostat Parts Questions & Experts Answers

Thermostat
2L2Z-8575-AA
Q: How to service the thermostat on a 4.0L SOHC engine on Ford Mustang?
A: Draining the cooling system should be the first step before servicing the thermostat on a 4.0L SOHC engine. First disconnect the air cleaner outlet pipe before removing the Throttle Body. Disassemble the Thermostat Housing by removing its upper three bolts before putting it aside while removing the worn O-ring seal. The installation process requires tightening the new thermostat to 10 Nm (89 inch lbs.) while placing a new O-ring seal that needs lubrication with clean engine coolant. Beginning with the removal procedure in the opposite order will allow a.correct installation of the thermostat and proper completion of cooling system fill and bleeding procedures.