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

To service the thermostat on a 4.0L SOHC engine, drain the cooling system, de-fit the Air Cleaner outlet pipe and Throttle Body then remove the upper thermostat housing bolts. Install the new thermostat and o-ring seal and tighten the bolts up to 10 Nm. Lastly, fill and bleed cooling system.

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
$47.98 MSRP: $76.18
You Save: $28.20 (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
$12.94 MSRP: $20.55
You Save: $7.61 (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
$36.18 MSRP: $57.45
You Save: $21.27 (38%)
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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
$176.33 MSRP: $280.00
You Save: $103.67 (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
$21.07 MSRP: $33.45
You Save: $12.38 (38%)
Ships in 1-2 Business Days
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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
$25.97 MSRP: $40.18
You Save: $14.21 (36%)
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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
$42.52 MSRP: $66.36
You Save: $23.84 (36%)
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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: GR3Z-8575-A
$70.42 MSRP: $111.82
You Save: $41.40 (38%)
Ships in 1-3 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:
- 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
$24.21 MSRP: $37.45
You Save: $13.24 (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
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Ford Mustang Thermostat Part Number: P2GZ-8575-A
$39.84 MSRP: $62.18
You Save: $22.34 (36%)
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

Ford Mustang Thermostat

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Ford Mustang Thermostat Parts and Q&A

Thermostat
7R3Z-8575-B
Q: How to service the thermostat on a 4.0L SOHC engine on Ford Mustang?
A: To service the thermostat on a 4.0L SOHC engine, drain the cooling system, de-fit the Air Cleaner outlet pipe and Throttle Body then remove the upper Thermostat Housing bolts. Install the new thermostat and o-ring seal and tighten the bolts up to 10 Nm. Lastly, fill and bleed cooling system.