BMW Thermostats

When it comes time to replace your thermostat, be sure you have everything you need. This kit includes everything you need to replace your thermostat, including the thermostat.

Kit includes:

• Thermostat
• Thermostat O-Ring
• 1.5 Liters of coolant

This item fits the following BMWs: 
2001-2006 E46 BMW M3 

This packages covers the major components you would install along with a new water pump or thermostat. On the N54 cars (135i, 335i, 535i) the water pump and theremostat are mounted together. In fact, to get to the thermostat, BMW expects you to remove the water pump. This package covers the whole job. With the electric water pump now an integral part of the efficiency and performance of the engine, staying on top of its maintenance and replacement is the smart thing to do.

Our water pump/thermostat overhaul includes:

• OEM VDO electric water pump, p/n 11517588885 or 11517632426
• OEM mounting screws for water pump (set of 3), p/n 11517602123
• OEM Behr thermostat, p/n 11537549476
• Original BMW connecting hose from thermostat to water pump, p/n 11537545665
• Original BMW hose clamps for hose (x 2)
  
• BUY AS A PACKAGE AND SAVE $$!
  
  The water pump on the N54 engine has more cooling responsibilities than ever before. Not only must it provide cooling for the engine, but it's also pumping fluid used to cool the turbocharger oil and automatic transmission oil. The good news is that the pump only works when, and only as much, as it needs to. The engine computer dictates how much fluid needs to be pumped through the system depending on the load. That means the system can actually stop the pump when warmer temperatures are needed. No longer is the pump spinning all the time from an engine-driven belt. The bad news is that it's now an electrical part, so a failure is usually immediate and with no warning. And if the electronics are at fault, there is no way to rebuild or repair it. Fortunately, the engine computer will force a shut down or reduce power if a problem occurs, preventing catastrophic engine damage.
  
  How to avoid a water pump failure in the future? Replacing the water pump as part of a regular interval schedule will ensure you always have a functioning pump in place. Since this technology is relatively new for BMW, therefore the lifecycle of the pump isn't yet known, we have been recommending replacement every 80-100k miles. This package of OE/OEM parts covers everything with Original BMW coolant offered to finish off the job. A proper bleeding procedure must be followed with the new electric pump.
  
  This water pump package fits the following BMWs with the N54 engine:
  2007-2010 E60 BMW 535i 535xi 535i xDrive
  2008-2010 E82 BMW 135i
  2011-2012 E82 BMW 1M Coupe
  2006-2010 E90 BMW 335i 335xi 335i xDrive - Sedan
  2007-2010 E92 BMW 335i 335is 335xi 335i xDrive - Coupe
  2007-2010 E93 BMW 335i - Convertible

When it comes time to replace your thermostat, be sure you have everything you need. This kit includes everything you need to replace your thermostat, including the thermostat.

Kit includes:

• Rein thermostat
• Thermostat mounting hardware
• 1 liter of coolant

This item fits the following BMWs: 
1999-2003  E39 BMW  540i 
 

When it comes time to replace your thermostat, be sure you have everything you need. This kit includes everything you need to replace your thermostat, including the thermostat.

Kit includes:

• Behr thermostat with O-ring
• Thermostat mounting hardware
• 1 Gallon BMW coolant

This item fits the following BMWs: 

1997-1998  E39 BMW  540i

When it comes time to replace your thermostat, be sure you have everything you need. This kit includes everything you need to replace your thermostat, including the thermostat.

Kit includes:

• Behr thermostat with O-ring
• Thermostat mounting hardware
• 1 Gallon BMW coolant

BMW N55 3.0L Thermostat Assembly is an essential component for maintaining optimal engine temperature in your BMW, ensuring reliable performance and longevity. A common source of cracks and leaks, the thermostat assembly plays a critical role in regulating coolant flow. This high-quality replacement from Turner Motorsport is designed to meet or exceed OEM standards, providing a dependable solution to prevent overheating and maintain your engine's efficiency.

• Reliable Temperature Regulation: Ensures optimal engine temperature for peak performance.
• High-Quality Replacement: Meets or exceeds OEM standards, reducing the risk of cracks and leaks.
• Enhanced Durability: Designed to withstand the demands of the N55 3.0L engine.
• Prevents Overheating: Critical for maintaining engine efficiency and longevity.
• Perfect Fit: Engineered for easy installation and compatibility with your BMW N55 3.0L engine.

Replacement stock MAP thermostat with plastic housing and gasket for E46, E39, E60, X5, Z4 - M54 engine, M52TU engine. Your car may still operate fine according the instrument display but the electrically-operated thermostat may be going bad. This new thermostat includes the thermostat gasket, ready to install in your BMW.

Hailing from Stuttgart, Mahle-Behr specializes in automotive cooling systems. From air conditioning to engine cooling M-B has you covered with OE-quality replacement parts.

Applications:
1999-2003 E39 528i, 525i, 530i sedan, touring wagon (M52TU engine, M54 engine)
1999-2005 E46 323, 328, 325, 330 sedan, coupe, cabrio, touring wagon (M52TU engine, M54 engine)
2004-2005 E60 525i, 530i sedan, touring wagon (M54 engine)
2001-2006 E53 X5 3.0 (M54 engine)
2004-2006 E83 X3 2.5i X3 3.0i (M54 engine)
1999-2002 Z3 2.3. Z3 2.5i, 2.8 Z3 3.0i (M54 engine)
2003-2005 Z4 2.5i, Z4 3.0 (M54 engine)

MINI R5X R6X Thermostat Housing W/ Thermostat Kit

Upgrade your MINI's cooling system with the MINI R5X R6X Thermostat Housing W/ Thermostat Kit. Commonly known as the thermostat neck or housing, this crucial part is responsible for regulating coolant flow to the pressure tank from the highest point on the head. Symptoms of a worn-out thermostat housing include cracking around the gasket seal, leading to leaks.

This comprehensive kit includes:

• Profile gasket
• Temp sensor
• Two O-rings
• Clip and bleeder screw

Additionally, this kit comes with a generous 3-year warranty, providing peace of mind for your MINI's cooling system.

Ensure optimal cooling system performance and prevent leaks with the MINI R5X R6X Thermostat Housing W/ Thermostat Kit.

The thermostat regulates the temperature of your coolant. At a predetermined temperature the thermostat will open to let coolant flow to the radiator and be cooled by airflow or the fan. Over time the thermostat will become stuck open or closed, leading to a variety of issues. A closed thermostat will never allow the coolant to reach the radiator and be cooled. Hot coolant will continue to circulate through the engine and absorb even more heat until boiling and the system overheats. An open thermostat is not as bad but is still not ideal - the coolant is always cool, with the temp needle always reading in the cool range. This tells the ECU to richen the fuel mixture to bring the car up to normal operating temp. So your fuel mileage decreases and the car runs rich.   

Replacing the thermostat is an easy but messy job. This thermostat includes the main o-ring (but a housing gasket may be required). Consider replacing the housing and any associated temp sensors while you're in there. The cooling system will need to be bled after.  

For vehicles with plastic thermostat housing 

Don't take chances! Proper maintenance is required to keep your BMW performing at peak levels. The thermostat basically controls when your car will overheat. The sensor on the housing is also used by the engine computer to set the fuel mapping on the engine. A faulty sensor or thermostat will lead to the engine running rich (too much fuel). This thermostat fits BMW E39 540i 99-03 E38 740i 99-01 X5 4.4i 4.6is 99-2003 with M62 engine. 

This item fits the following BMWs: 
1999-2001  E38 BMW  740i 740il 
1999-2003  E39 BMW  540i 
1999-2003  E53 BMW  X5 4.4i X5 4.6is