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BMW E34 Thermostats

BMW E34 Thermostats BMW thermostats. Don't take chances! Proper maintenance is required to keep your car performing at peak levels. The thermostat basically controls when your car will overheat. Don't let it fail on you. We carry both OEM BMW thermostats and low temp aftermarket BMW thermostats for use in hot climates or track/race use
You're currently viewing parts for your (E34) 5-Series 1989-1995. Reset your chassis
For accurate results, specify your model below.
Genuine BMW Thermostat Housing - E30 325e 325i, E34 525i - M20 engine

This is the stock aluminum thermostat housing for cars with the M20 6 cylinder engine - 325e, 325i, 528e, 525i. This is the side of the housing that mounts to the cylinder head and has openings for the various coolant / engine temperature sensors. There are 4 ports for sensors so check your existing housing for the sensor layout.


This item fits the following BMWs:
1984-1991 E30 BMW 325e 325es 325i 325ic 325is 325ix
5/1982-1988 E28 BMW 528e
1989-1990 E34 BMW 525i

Part #: 11531730470
Price: $75.72 (USD) 
Quantity:   
Thermostat - 68 Degree - E24, E28, E30, E32, E34, E36, E39, Z3 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. 

Most of the engines from the mid-1980s through the 1990s use the same thermostat design and they are interchangeable among the different temperatures. This is the 68*C thermostat, at the bottom of the temperature range. It should only be used in racing situations such as when deleting the engine fan. However, keep in mind that BMW spent a lot of time engineering the cooling system to work in all kinds of conditions and changing thermostat temperature is not recommended to fix any failures in the cooling system. 

This thermostat fits the following BMWs:  
1977-1983  E21 BMW  323i 
1986-1991  E30 BMW  318is 318ic 325e 325es 325i 325ic 325is 325ix 
1992-1999  E36 BMW  318i 318is 318ti 318ic 323is 323ic 325i 325is 325ic 328i 328is 328ic M3 
1982-1988  E28 BMW  528e 
1986-1988  E28 BMW  535i 
1989-1995  E34 BMW  525i 535i 
1997-1998  E39 BMW  528i 
1986-1989  E24 BMW  635csi 
1988-1994  E32 BMW  735i 735il 
1997-2000  Z3 BMW  Z3 2.8 M Roadster M Coupe 
Part #: MMTSE3692L
Price: $48.00 (USD) 
Quantity:   
Aluminum Thermostat Housing Cover - E32 E34 E38 E31 with M60 V8 engine This aluminum thermostat housing cover is a direct replacement for the factory unit. It fits BMW E32 740i 740il E34 530i 540i E38 740i 740il 1995, E31 840i thru 1995.

This item fits the following BMWs:
1993-1995 E34 BMW 530i 540i
1988-1994 E32 BMW 740i 740il
1995-2001 E38 BMW 740i 740il
1990-1999 E31 BMW 840i 840ci
Part #: 11531720173
Price: $19.95 (USD) 
Quantity:   
Thermostat M60 - E32 740i E34 530i 540i E38 740i E31 840ci Don't take chances! Proper maintenance is required to keep your car performing at peak levels. The thermostat basically controls when your car will overheat. Don't let it fail on you. This thermostat fits BMW E32 740i E34 530i 540i E38 740i E31 840ci with M60 engine.

This item fits the following BMWs:
1992-1994 E32 BMW 740i 740il
1993-1995 E34 BMW 530i 530i wagon 540i
1995-1996 E38 BMW 740i 740il
1991-1996 E31 BMW 840i 840ci with M60 engine
Part #: 11531702279
Price: $24.95 (USD) 
Quantity:   
Aftermarket Thermostat Housing - E30 325e 325i, E34 525i - M20 engine

This is the stock aluminum thermostat housing for cars with the M20 6 cylinder engine - 325e, 325i, 528e, 525i. This is the side of the housing that mounts to the cylinder head and has openings for the various coolant / engine temperature sensors. There are 4 ports for sensors so check your existing housing for the sensor layout.


This item fits the following BMWs:
1984-1991 E30 BMW 325e 325es 325i 325ic 325is 325ix
5/1982-1988 E28 BMW 528e
1989-1990 E34 BMW 525i

Part #: 11531730470
Price: $42.95 (USD) 
Quantity:   
Thermostat - 62 Degree - E24, E28, E30, E32, E34, E36, E39, Z3 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.  

Most of the engines from the mid-1980s through the 1990s use the same thermostat design and they are interchangeable among the different temperatures. This is the 62*C thermostat, at the bottom of the temperature range. It should only be used in racing situations such as when deleting the engine fan. However, keep in mind that BMW spent a lot of time engineering the cooling system to work in all kinds of conditions and changing thermostat temperature is not recommended to fix any failures in the cooling system.  

This thermostat fits the following BMWs:    
1977-1983   E21 BMW   323i  
1986-1991   E30 BMW   318is 318ic 325e 325es 325i 325ic 325is 325ix  
1992-1999   E36 BMW   318i 318is 318ti 318ic 323is 323ic 325i 325is 325ic 328i 328is 328ic M3  
1982-1988   E28 BMW   528e  
1986-1988   E28 BMW   535i  
1989-1995   E34 BMW   525i 535i  
1997-1998   E39 BMW   528i  
1986-1989   E24 BMW   635csi  
1988-1994   E32 BMW   735i 735il  
1997-2000   Z3 BMW   Z3 2.8 M Roadster M Coupe 
Part #: MMTSE3692
Price: $48.00 (USD) 
Quantity:   
71°C Thermostat - M50

Under extreme heat conditions like on the racetrack, or on the open road in high-ambient temperature areas, the M50 is susceptible to overheating failures – such as upper radiator hose outlet break-off or cracking of plastic thermostat housing. A lower 71 degree Celsius thermostat helps the engine run cooler from the start, reaching operational temperature earlier to enhance circulation and dissipate heat. The net effect is reduced thermal stress on the entire cooling system. Compare the factory thermostat that has a rating of 88 degree Celsius to the 71 degree of the Active thermostat.

Thermostat includes factory O-RING for a simple and complete installation. This device is not intended for installation in colder climates. The engine will run that much colder making the heating system slow to react or become inactive. Recommended for sporty driving with high engine temperatures.

For M50 motors
 

Part #: 14-008
Price: $40.00 (USD) 
Quantity:   
Thermostat - 71 Degree - E24, E28, E30, E32, E34, E36, E39, Z3

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.

Most of the engines from the mid-1980s through the 1990s use the same thermostat design and they are interchangeable among the different temperatures. This is the 71* thermostat, at the bottom of the temperature range. It should only be used in racing situations such as when deleting the engine fan. However, keep in mind that BMW spent a lot of time engineering the cooling system to work in all kinds of conditions and changing thermostat temperature is not recommended to fix any failures in the cooling system.

Hella is a premium manufacturer that supplies automotive parts to numerous car brands across the world. Everything from electrical to mechanical genuine parts have been made and supplied directly to BMW before the vehicles ever leave the production floor. Their high quality, long lasting parts have made them a trusted brand chosen to help keep your BMW on the road for many years to come.


As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts.  All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!

This thermostat fits the following BMWs:
1977-1983 E21 BMW 323i
1986-1991 E30 BMW 318is 318ic 325e 325es 325i 325ic 325is 325ix
1992-1999 E36 BMW 318i 318is 318ti 318ic 323is 323ic 325i 325is 325ic 328i 328is 328ic M3
1982-1988 E28 BMW 528e
1986-1988 E28 BMW 535i
1989-1995 E34 BMW 525i 535i
1997-1998 E39 BMW 528i
1986-1989 E24 BMW 635csi
1988-1994 E32 BMW 735i 735il
1997-2000 Z3 BMW Z3 2.8 M Roadster M Coupe

Part #: TMS1907
Price: $28.95 (USD) 
Quantity:   
Thermostat - 88 Degree - E24, E28, E30, E32, E34, E36, E39, Z3 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.

Most of the engines from the mid-1980s through the 1990s use the same thermostat design and they are interchangeable among the different temperatures. This is the 88* thermostat, towards the top of the range. However, keep in mind that BMW spent a lot of time engineering the cooling system to work in all kinds of conditions and changing thermostat temperature is not recommended to fix any failures in the cooling system.

This thermostat fits the following BMWs:
1977-1983  E21 BMW  323i
1986-1991  E30 BMW  318is 318ic 325e 325es 325i 325ic 325is 325ix
1992-1999  E36 BMW  318i 318is 318ti 318ic 323is 323ic 325i 325is 325ic 328i 328is 328ic M3
1982-1988  E28 BMW  528e
1986-1988  E28 BMW  535i
1989-1995  E34 BMW  525i 535i
1997-1998  E39 BMW  528i
1986-1989  E24 BMW  635csi
1988-1994  E32 BMW  735i 735il
1997-2000  Z3 BMW  Z3 2.8 M Roadster M Coupe
Part #: 11537511580
Price: $19.95 (USD) 
Quantity:   
Thermostat - 80 Degree - E24, E28, E30, E32, E34, E36, E39, Z3 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.

Most of the engines from the mid-1980s through the 1990s use the same thermostat design and they are interchangeable among the different temperatures. This is the 80* thermostat, towards the lower end of the range. However, keep in mind that BMW spent a lot of time engineering the cooling system to work in all kinds of conditions and changing thermostat temperature is not recommended to fix any failures in the cooling system.

This thermostat fits the following BMWs:
1977-1983 E21 BMW 323i
1986-1991 E30 BMW 318is 318ic 325e 325es 325i 325ic 325is 325ix
1992-1999 E36 BMW 318i 318is 318ti 318ic 323is 323ic 325i 325is 325ic 328i 328is 328ic M3
1982-1988 E28 BMW 528e
1986-1988 E28 BMW 535i
1989-1995 E34 BMW 525i 535i
1997-1998 E39 BMW 528i
1986-1989 E24 BMW 635csi
1988-1994 E32 BMW 735i 735il
1997-2000 Z3 BMW Z3 2.8 M Roadster M Coupe
Part #: 11531713040
Price: $26.95 (USD) 
Quantity:   
Aluminum Thermostat Housing Kit - M50 Plastic thermostat housing cracked on your M50?

Here are your choices: you can wait for the plastic factory thermostat housing cover to break and cause major overheating. (Even with a new stock cover, it won’t take long.) Or you can install a thoughtfully engineered all-aluminum thermostat housing cover from Active Autowerke and never experience this type of failure again. Currently there is no factory upgraded part to this problem. This is an aluminum extruded part that has all of the openings machine properly to fit like factory; from the mounting bolt holes, the seating of the thermostat to the sealing opening for the ORANGE gasket. Forged to exact factory tolerances, everything fits and this unit is a true easy bolt-on – especially suited for racing or load conditions like heavy traffic, where engine temp can rise rapidly. The housing is guaranteed never to break from overheating or over-tightening, and its CNC machined surface ensures a precise seat.

Unit comes complete with a new ORANGE sealing gasket; a new thermostat is recommended but not included.
For hotter climates, a 71 degree thermostat is recommended over the 82 degree unit.
Part #: 14-009
Price: $44.00 (USD) 
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Thermostat - E34 E39 M5 - Z8 - Don't take chances! Proper maintenance is required to keep your car performing at peak levels. The thermostat basically controls when your car will overheat. Don't let it fail on you. This thermostat fits BMW E39 M5 E34 M5 and Z8

This thermostat fits the following BMWs:
1991-1993 E34 BMW M5
1998-2004 E39 BMW M5
2000-2003 E52 BMW Z8
Part #: 11537835558
Price: $59.75 (USD) 
Aluminum Thermostat Housing - E34 525i, E36 325i 328i M3, Z3 A COMMON FAILURE ! Replace your brittle plastic factory housing with this rugged aluminum one! A cracked plastic housing can leave you stranded, eliminate that risk with this metal housing. Includes 11531722531 thermostat housing and 11531740437 profile gasket. (This is one of TMS's best sellers).

This thermostat fits the following BMWs:
1991-1995 E34 5 Series BMW 525i 525i wagon
1992-1998 E36 3 Series BMW 325i 325is 325ic 328i 328is 328ic 323is 323ic
1995-1999 E36 3 Series BMW M3
1996-1998 Z3 BMW Z3 2.8i Z3 M Roadster, M Coupe - S52 engine
Part #: 11531722531K
Price: $23.90 (USD) 
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