2025 Ford Mustang Thermostats – OEM Precision for Engine Temperature Control

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Mustang Thermostats 2025 – Restore Confidence with OEM Thermostats for Your 2025 Mustang

Maintain ideal engine performance and avoid overheating with OEM-quality thermostats engineered for the 2025 Ford Mustang. These thermostats regulate coolant flow to help your engine reach operating temperature quickly and stay there—protecting performance, efficiency, and longevity.

Designed to Ford’s exact factory specifications, OEM thermostats provide precise temperature control, long-lasting durability, and a guaranteed fit. Whether you’re replacing a stuck thermostat or upgrading during scheduled maintenance, OEM parts ensure cooling system reliability.

Thermostat

Part Number: BR3Z-8575-G
Ford Ford
Notes: Included with thermostat housing.
Applications: 5.0L. 3.0L. 5.2L GT500. 5.2L GT350, GT350R.
Other Names: Thermostat, Thermostat Assembly, rt1258
Replaces: BR3Z-8575-A, BR3Z-8575-D, RT-1208, RT-1225
Description: Mustang. 5.0L. Explorer. Without supercharger. Continental. Manual transmission. 3.0L with hybrid, main. Police Interceptor Utility....
Fits:
  • Ford:
    • Explorer,
    • Mustang,
    • Police Interceptor Utility
  • Lincoln:
    • Aviator,
    • Continental
MSRP $40.18
$25.86

Thermostat

Part Number: GR3Z-8575-A
Ford Ford
Notes: Included with adapter.
Other Names: Thermostat Assembly
Description: 5.0L.
Fits:
  • Ford:
    • Mustang
MSRP $111.82
$71.34

Thermostat Outlet

Part Number: BR3Z-18599-A
Ford Ford
Notes: Included with thermostat housing.
Applications: 5.0L. 5.2L GT350, GT350R.
Other Names: Water Inlet, Water Outlet, Inlet Connector, Thermostat Cover, Connection Water Inlet
Description: F150. 5.0L, main, single alternator. Mustang. Without supercharger. Manual transmission. With high output.
Fits:
  • Ford:
    • F-150,
    • Mustang
MSRP $60.00
$34.80

Thermostat Housing

Part Number: BR3Z-8A586-N
Ford Ford
Notes: Includes Water Outlet, Thermostat And Gaskets.
Applications: 5.0L. 5.2L GT350, GT350R.
Other Names: Thermostat Housing, Connection Water Outlet, rh298
Replaces: BR3Z-8592-A, BR3Z-8A586-K, BR3Z-8A586-L, BR3Z-8A586-M
Description: Mustang. 5.0L. Without supercharger. Automatic transmission. With high output.
Fits:
  • Ford:
    • Mustang
MSRP $256.67
$178.64

Thermostat Housing

Part Number: PB5Z-8592-A
Ford Ford
Applications: 2.3L.
Other Names: Thermostat Outlet, Water Outlet, Engine Coolant Thermostat Housing, Connection Water Outlet
Description: Explorer. From 5/13/2024. 2.3L. Mustang. 2025. From 05/22/2023.
Fits:
  • Ford:
    • Explorer,
    • Mustang
MSRP $70.00
$48.72

Thermostat Gasket

Part Number: BR3Z-8255-A
Ford Ford
Notes: Included with water manifold. Included with thermostat housing.
Applications: 3.5L. 5.0L. 2.5L. 3.3L Gas. 2.7L & 3.0L. 3.0L Diesel. 3.3L Hybrid. 2.0L W/HYBRID. 5.2L GT350, GT350R.
Other Names: Thermostat Gasket, Gasket, Engine Coolant Thermostat Housing Seal, Thermostat Seal, Thermostat Housing Gasket, Thermostat Cover...
Fits:
  • Ford:
    • Bronco,
    • C-Max,
    • Edge,
    • Escape,
    • Expedition,
    • Explorer,
    • F-150,
    • Fusion,
    • Maverick,
    • Mustang,
    • Police Interceptor Utility,
    • Police Responder Hybrid,
    • Ranger,
    • SSV Plug-In Hybrid,
    • Transit-150,
    • Transit-250,
    • Transit-350,
    • Transit-350 HD
  • Lincoln:
    • Aviator,
    • Continental,
    • Corsair,
    • MKX,
    • MKZ,
    • Nautilus,
    • Navigator
MSRP $3.53
$2.27

Engine Coolant Thermostat

Part Number: P2GZ-8575-A
Ford Ford
Notes: Included with housing. Includes Thermostat Gasket.
Applications: 2.0L. 2.3L.
Other Names: Thermostat, Thermostat Assembly
Description: Escape. 2.0L, 2023-25. Explorer. From 5/13/2024. Corsair. 2025, without tremor. 2.3L. Mustang. From 05/22/2023.
Fits:
  • Ford:
    • Escape,
    • Explorer,
    • Maverick,
    • Mustang
  • Lincoln:
    • Corsair
MSRP $62.18
$39.67

Thermostat Housing Gasket

Part Number: KR3Z-8590-A
Ford Ford
Notes: Included with thermostat housing.
Other Names: Thermostat Housing Seal, Water Manifold Lower Seal, Seal
Description: 5.0L, main, single alternator. Manual transmission. 5.2L.
Fits:
  • Ford:
    • F-150,
    • Mustang
MSRP $4.02
$2.82

Motorcraft™ Thermostat

Part Number: RT-1258
Ford Ford
Notes: Included with thermostat housing.
Applications: 5.0L. 3.0L. 5.2L GT500. 5.2L GT350, GT350R.
Other Names: Motorcraft™ Engine Coolant Thermostat, Thermostat Assembly
Description: Mustang. Aviator. 5.0L. Explorer. Without supercharger. Continental. Manual transmission. 3.0L with hybrid, main. Police Interceptor...
Fits:
  • Ford:
    • Explorer,
    • Mustang,
    • Police Interceptor Utility
  • Lincoln:
    • Aviator,
    • Continental
MSRP $40.18
$25.86

Thermostat Housing Bolt

Part Number: W713197-S437
Ford Ford
Other Names: Tube Assembly Bolt, Water Pipe Bolt, Thermostat Housing Upper Bolt, Thermostat Unit Bolt, Engine Coolant Thermostat Housing Bolt,...
Fits:
  • Ford:
    • Edge,
    • Expedition,
    • Explorer,
    • F-150,
    • Mustang,
    • Police Interceptor Sedan,
    • Police Interceptor Utility,
    • Taurus
  • Lincoln:
    • MKZ,
    • Navigator
MSRP $6.75
$3.95

Engine Coolant Thermostat Housing Gasket

Part Number: F1VY-8255-A
Ford Ford
Notes: Included with water outlet. Included with lower housing. Included with water manifold. Included with housing assembly. Included with...
Applications: 6.2L. 3.0L. 3.7L. 7.3L. 2.0L. 2.3L. 4.6L, 5.4L. 5.4L, 6.8L. 3.5L W/O TURBO. 1999-07 SUPER DUTY.
Other Names: Engine Coolant Thermostat Gasket, Thermostat Gasket, Gasket, Thermostat Seal, Thermostat Housing Gasket, Thermostat O-Ring,...
Fits:
  • Ford:
    • Contour,
    • Crown Victoria,
    • E-150,
    • E-150 Club Wagon,
    • E-150 Econoline,
    • E-150 Econoline Club Wagon,
    • E-250,
    • E-250 Econoline,
    • E-350 Club Wagon,
    • E-350 Econoline,
    • E-350 Econoline Club Wagon,
    • E-350 Super Duty,
    • E-450 Econoline Super Duty,
    • E-450 Super Duty,
    • E-550 Econoline Super Duty,
    • E-550 Super Duty,
    • Econoline Super Duty,
    • Edge,
    • Escape,
    • Excursion,
    • Expedition,
    • Explorer,
    • Explorer Sport Trac,
    • F-150,
    • F-150 Heritage,
    • F-250,
    • F-250 Super Duty,
    • F-350 Super Duty,
    • F-450 Super Duty,
    • F-550 Super Duty,
    • Five Hundred,
    • Flex,
    • Freestyle,
    • Fusion,
    • GT,
    • Maverick,
    • Mustang,
    • Police Interceptor Sedan,
    • Police Interceptor Utility,
    • Taurus,
    • Taurus X,
    • Thunderbird
  • Lincoln:
    • Aviator,
    • Blackwood,
    • Continental,
    • Corsair,
    • LS,
    • Mark LT,
    • Mark VIII,
    • MKS,
    • MKT,
    • MKX,
    • MKZ,
    • Nautilus,
    • Navigator,
    • Town Car,
    • Zephyr
  • Mercury:
    • Cougar,
    • Grand Marquis,
    • Marauder,
    • Mariner,
    • Milan,
    • Montego,
    • Mountaineer,
    • Mystique,
    • Sable
MSRP $4.51
$2.90

Motorcraft™ Engine Coolant Thermostat Gasket

Part Number: RG-571
Ford Ford
Notes: Included with water outlet. Included with lower housing. Included with water manifold. Included with housing assembly. Included with...
Applications: 6.2L. 3.0L. 3.7L. 7.3L. 2.0L. 2.3L. 4.6L, 5.4L. 5.4L, 6.8L. 3.5L W/O TURBO. 1999-07 SUPER DUTY.
Other Names: Motorcraft™ Thermostat Gasket, Motorcraft™ Gasket, Motorcraft™ Thermostat Seal, Motorcraft™ Engine Coolant Thermostat O-Ring,...
Fits:
  • Ford:
    • Contour,
    • Crown Victoria,
    • E-150,
    • E-150 Club Wagon,
    • E-150 Econoline,
    • E-150 Econoline Club Wagon,
    • E-250,
    • E-250 Econoline,
    • E-350 Club Wagon,
    • E-350 Econoline,
    • E-350 Econoline Club Wagon,
    • E-350 Super Duty,
    • E-450 Econoline Super Duty,
    • E-450 Super Duty,
    • E-550 Econoline Super Duty,
    • E-550 Super Duty,
    • Econoline Super Duty,
    • Edge,
    • Escape,
    • Excursion,
    • Expedition,
    • Explorer,
    • Explorer Sport Trac,
    • F-150,
    • F-150 Heritage,
    • F-250,
    • F-250 Super Duty,
    • F-350 Super Duty,
    • F-450 Super Duty,
    • F-550 Super Duty,
    • Five Hundred,
    • Flex,
    • Freestyle,
    • Fusion,
    • GT,
    • Maverick,
    • Mustang,
    • Police Interceptor Sedan,
    • Police Interceptor Utility,
    • Taurus,
    • Taurus X,
    • Thunderbird
  • Lincoln:
    • Aviator,
    • Blackwood,
    • Continental,
    • Corsair,
    • LS,
    • Mark LT,
    • Mark VIII,
    • MKS,
    • MKT,
    • MKX,
    • MKZ,
    • Nautilus,
    • Navigator,
    • Town Car,
    • Zephyr
  • Mercury:
    • Cougar,
    • Grand Marquis,
    • Marauder,
    • Mariner,
    • Milan,
    • Montego,
    • Mountaineer,
    • Mystique,
    • Sable
MSRP $4.51
$2.90
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Why Choose OEM Thermostats for the 2025 Ford Mustang?

OEM Fitment – Designed for factory specifications to ensure precise performance. 

Prevents Failures – Maintains optimal operation and longevity. 

Durable Construction – Made from high-quality, corrosion-resistant materials. 

Efficient Operation – Ensures proper function and system protection. 

Easy Installation – Direct bolt-on replacement with no modifications required.

Compatible Ford Mustang Trims

These OEM thermostats fit the following 2025 Mustang trims:

  • Mustang EcoBoost (2.3L Turbocharged)

  • Mustang GT (5.0L V8)

  • Mustang GT Premium

  • Mustang Dark Horse Thermostat temperature ratings and housing may vary depending on engine configuration. Always confirm compatibility before purchase.

Signs Your 2025 Mustang Thermostat Needs Replacement

🚙 Engine overheating or running too cold 

🚙 Cabin heat underperforming 

🚙 Erratic or stuck temperature gauge readings 

🚙 Coolant leaks near the thermostat housing 

🚙 Check engine light for temperature-related codes

A malfunctioning thermostat can cause poor fuel economy, engine wear, and even overheating—replacing it early protects long-term performance.

How to Replace the Thermostat on a 2025 Ford Mustang

Thermostat replacement is a moderate DIY project if you're comfortable with coolant system work.

Tools Required: 

✔ Socket and ratchet set 

✔ Drain pan 

✔ Gasket scraper

✔ Torque wrench 

✔ OEM thermostat and gasket 

✔ New coolant

Step-by-Step Instructions:

  1. Allow the Engine to Cool Completely – Never open the cooling system when hot.

  2. Drain Coolant Below the Thermostat Level – Use a drain pan for clean disposal.

  3. Remove Thermostat Housing – Usually connected to the upper or lower radiator hose.

  4. Take Out the Old Thermostat – Note orientation before removal.

  5. Clean the Housing Surface – Remove any old gasket material or residue.

  6. Install the New Thermostat and Gasket – Torque bolts to spec.

  7. Refill and Bleed the Cooling System – Top off coolant and remove air pockets.

Popular Related Parts for 2025 Mustang

🔹 2025 Mustang Water Pump – Circulates coolant through the engine 

🔹 2025 Mustang Radiator – Maintains cooling system efficiency 

🔹 2025 Mustang Thermostat Housing – Replace if cracked or corroded 

🔹 2025 Mustang Coolant Temperature Sensor – Ensures accurate readings for the ECU 

🔹 2025 Mustang Radiator Hoses – Replace old hoses to prevent leaks or collapses

Get Your 2025 Mustang Thermostat Today!

Avoid overheating and protect your engine with a precision-engineered OEM thermostat made specifically for your 2025 Ford Mustang. Ensure cooling system accuracy and extend engine life with the right replacement. 

🛒 Cool with Confidence – Shop OEM Thermostats Now!

FAQs About 2025 Ford Mustang Thermostats

When should I replace the thermostat on my Mustang? Typically every 60,000–100,000 miles, or sooner if failure symptoms appear.

Can a stuck thermostat damage the engine? Yes. A stuck-closed thermostat can cause overheating, while a stuck-open one prevents proper warm-up—both impact performance and fuel efficiency.

Do I need to replace coolant when changing the thermostat? Yes. It’s a great opportunity to flush old coolant and refill with fresh, approved fluid.

Is thermostat replacement DIY-friendly? Yes, with proper tools and safety precautions, most owners can handle the job in a few hours.

Are OEM thermostats better than aftermarket? Absolutely—OEM units offer exact fitment, factory-calibrated temperature control, and longer-lasting reliability.