Mustang Thermostats – OEM-Quality Cooling Control for 2015 Ford Models

Filter

Protect Your 2015 Mustang’s Engine with a New Thermostat

Your 2015 Ford Mustang depends on a properly functioning thermostat to maintain optimal engine temperature. A thermostat stuck open or closed can lead to overheating, poor fuel economy, or sluggish performance.

Replace worn or faulty thermostats with OEM-quality units that ensure precise temperature control and coolant flow. These thermostats are built to factory specifications for long-lasting, reliable performance in all driving conditions—from daily commuting to aggressive performance driving.

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 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

Thermostat Housing

Part Number: BL3Z-8A586-G
Ford Ford
Notes: Includes Water Outlet, Thermostat, And Gaskets. Includes Housing Gasket (Lower), Thermostat, Thermostat Gasket And Water Outlet.
Applications: 3.5L. 3.7L. 3.3L Gas. 3.3L Hybrid.
Other Names: Engine Coolant Thermostat Kit, Thermostat Unit, Connection Water Outlet, rh309
Replaces: BL3Z-8592-C, BL3Z-8A586-B, BR3Z-8592-B, RH-244
Fits:
  • Ford:
    • Expedition,
    • Explorer,
    • F-150,
    • Mustang,
    • Police Interceptor Utility,
    • Transit-150,
    • Transit-250,
    • Transit-350,
    • Transit-350 HD
  • Lincoln:
    • Navigator
MSRP $205.00
$142.68

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 Unit

Part Number: FR3Z-8575-A
Ford Ford
Notes: Includes Gasket And Thermostat Housing.
Applications: 2.3L. 2.0L W/O HYBRID.
Other Names: Thermostat, Thermostat Housing, Thermostat Assembly, rt1233
Fits:
  • Ford:
    • Edge,
    • Escape,
    • Explorer,
    • Focus,
    • Fusion,
    • Mustang,
    • Transit Connect
  • Lincoln:
    • MKC,
    • MKZ
MSRP $57.45
$36.66

Thermostat Outlet

Part Number: BR3Z-8592-Q
Ford Ford
Notes: Included with thermostat housing.
Applications: 3.5L. 3.7L. 3.3L Gas. 3.3L Hybrid.
Other Names: Water Outlet, Engine Coolant Thermostat Housing, Outlet Tube, Connection Water Outlet, rh226
Fits:
  • Ford:
    • Expedition,
    • Explorer,
    • F-150,
    • Mustang,
    • Police Interceptor Utility,
    • Transit-150,
    • Transit-250,
    • Transit-350,
    • Transit-350 HD
  • Lincoln:
    • Navigator
MSRP $256.67
$178.64

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: W714841-S437
Ford Ford
Other Names: Engine Coolant Thermostat Housing Bolt, Thermostat Unit Mount Bolt, Bolt
Description: 3.7L. 3.5L non turbo. 3.5L with turbo, to 09/25/2016. 2015-17. 3.3L, main. 3.5L without turbo.
Fits:
  • Ford:
    • Expedition,
    • Explorer,
    • F-150,
    • Mustang,
    • Police Interceptor Utility,
    • Transit-150,
    • Transit-250,
    • Transit-350,
    • Transit-350 HD
  • Lincoln:
    • Navigator
MSRP $8.00
$4.68

Engine Coolant Thermostat

Part Number: BL3Z-8575-B
Ford Ford
Notes: Included with thermostat housing.
Applications: 3.7L. 3.5L. 3.3L Gas. 3.3L Hybrid.
Other Names: Thermostat, Thermostat Assembly, rt1255
Replaces: BL3Z-8575-A, RT-1213
Fits:
  • Ford:
    • Expedition,
    • Explorer,
    • F-150,
    • Mustang,
    • Police Interceptor Utility,
    • Transit-150,
    • Transit-250,
    • Transit-350,
    • Transit-350 HD
  • Lincoln:
    • Navigator
MSRP $37.45
$24.10

Motorcraft™ Thermostat

Part Number: RT-1233
Ford Ford
Notes: Includes Gasket And Thermostat Housing.
Applications: 2.3L. 2.0L W/O HYBRID.
Other Names: Motorcraft™ Engine Coolant Thermostat Kit, Motorcraft™ Thermostat Housing, Motorcraft™ Thermostat Unit, Thermostat Assembly
Fits:
  • Ford:
    • Edge,
    • Escape,
    • Explorer,
    • Focus,
    • Fusion,
    • Mustang,
    • Transit Connect
  • Lincoln:
    • MKC,
    • MKZ
MSRP $57.45
$36.66

Motorcraft™ Thermostat

Part Number: RT-1255
Ford Ford
Notes: Included with thermostat housing.
Applications: 3.7L. 3.5L. 3.3L Gas. 3.3L Hybrid.
Other Names: Motorcraft™ Engine Coolant Thermostat, Thermostat Assembly
Fits:
  • Ford:
    • Expedition,
    • Explorer,
    • F-150,
    • Mustang,
    • Police Interceptor Utility,
    • Transit-150,
    • Transit-250,
    • Transit-350,
    • Transit-350 HD
  • Lincoln:
    • Navigator
MSRP $37.45
$24.10
Page

No results found for "Thermostats". Here are some helpful search tips:

  • Search by a part name. Example: water pump.
  • Be less specific. Example: brake instead of ceramic brake.
  • Remove information such as make, year or model.
  • Can't find the part you are looking for? Contact us and we'll find it for you!


Why Choose OEM Thermostats?

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 with the 2015 Ford Mustang

These thermostats are compatible with multiple 2015 Mustang engine options: 3.7L V6, 2.3L EcoBoost I4, and 5.0L V8 Coyote 

📌 Check your engine type and thermostat temperature rating before ordering.

How to Replace a 2015 Mustang Thermostat

Replacing a worn thermostat helps prevent cooling issues and engine stress.

Tools Required: 

✔ Socket wrench set 

✔ Drain pan 

✔ Gasket scraper 

✔ Coolant 

✔ Torque wrench

Steps:

  1. Let the engine cool and drain enough coolant from the radiator.

  2. Locate the thermostat housing near the upper radiator hose.

  3. Remove the housing and take out the old thermostat.

  4. Clean the gasket surface and install the new thermostat and gasket.

  5. Reassemble housing, refill coolant, and bleed air from the system.

🛠️ Tip: Always use a new gasket or O-ring during replacement to avoid leaks.

Signs of a Failing Thermostat

🔹 Engine overheating or temperature gauge spiking 

🔹 Heater blowing cold air 

🔹 Coolant leaks near thermostat housing 

🔹 Reduced fuel efficiency 

🔹 Long warm-up times or fluctuating temperatures

Ignoring thermostat issues can lead to serious engine damage—replace it at the first signs of failure.

2015 Mustang Thermostat Options

🔹 OEM Replacement Thermostats – Match factory performance and fit. 

🔹 High-Performance Thermostats – Open at lower temps for tuned or track-driven Mustangs. 

🔹 Complete Thermostat Kits – Includes housing, sensor, and gaskets for a full repair.

Popular Related Parts for 2015 Ford Mustang

🔹 Mustang Radiators – Improve cooling efficiency with a fresh core. 

🔹 Mustang Water Pumps – Keep coolant circulating to prevent engine damage. 

🔹 Mustang Coolant Temperature Sensors – Maintain accurate temp readings and fan activation.

Get Your 2015 Mustang Thermostat Today!

Don’t let overheating sideline your Mustang. Restore your 2015 model’s cooling system performance with a direct-fit OEM thermostat built to keep things running smooth. 

🛒 Upgrade Your Ride 🚙 – Shop Now!

FAQs About 2015 Ford Mustang Thermostats

❓ How often should I replace my thermostat? Typically every 80,000–100,000 miles, or at the first sign of failure.

❓ Can I replace the thermostat myself? Yes. It’s a relatively simple DIY job with basic tools and coolant.

❓ Should I replace the gasket with the thermostat? Absolutely. A new gasket or O-ring ensures a proper seal and prevents leaks.

❓ What temperature should my Mustang thermostat open at? Most OEM thermostats open between 180–195°F, depending on the engine.

❓ Is a performance thermostat worth it? If you're tuned or tracking your Mustang, a lower-temp thermostat may help with heat management.