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Thermostats

A BMW thermostat controls the flow of coolant from your BMW engine through the radiator. During warmup coolant flows, but not into the radiator until proper operating temperature has been reached. Only then does the BMW thermostat open and allows coolant to move through your radiator for engine cooling, adjusting flow rate to ensure safe operating temperatures under all conditions. Whether a thermostat is stuck open (engine too cold) or thermostat stuck closed (engine too hot) an old or failing thermostat must be replaced immediately. Use our SEARCH BY MODEL feature to filter these items for your BMW.

Want to learn more about your BMW's cooling system? Check out our BMW cooling system tech page by clicking here.

Need help finding Thermostats for your BMW? Call us at 877.639.9648, email us, or live chat for expert assistance.
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Thermostat O-Ring, Wahler - E46 M3, MZ3 S54, Z4M

Seals thermostat to water pump housing. OEM replacement for BMW part #11531318402.

Price: $3.99

8.67
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Engine Coolant Thermostat OEM - E28 M5 E24 M6 - 80 Degree C

OEM Vernet-Calorstat 80C coolant thermostat for the S38 engine.

Price: $17.98

68.38
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Thermostat, Rein - 128i/135i, 325i/328i/330i/335i, X3, Z4

OEM-type thermostat to regulate cooling system temp. Replaces BMW part #11537549476.

Price: $55.99

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Auto Transmission Cooler Thermostat, Rein - E46, E83 X3, E53 X5, E85/E86 Z4

OEM-type thermostat to regulate transmission cooler. Replaces BMW part #17111437362.

Price: $24.90

101.55
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Competition Thermostat Kit, Mishimoto 70C - E46, E39, E60, X3, X5, Z3, Z4 (M52TU/M54)

Replacement mechanical thermostat kit for the failure-prone electronic part

Price: $117.95

143.95
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Competition Thermostat Kit, AAF 80C - E46, E39, E60, X3, X5, Z3, Z4 (M52TU/M54)

Replacement mechanical thermostat kit for the failure-prone electronic part

Price: $174.99

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Thermostat Assembly, URO - E39 540i, E38 740i/iL, X5 4.4/4.6is, M62TU

Aftermarket replacement thermostat for your cooling system. Replaces BMW part # 11531436386

Price: $44.99

134.48
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Coolant Outlet Connector, BMW - F22, F3X, G30, G12, G01, G02 (B58A)

Coolant return pipe on side of engine block. Genuine replacement for BMW part #11118619408.

Price: $35.53

37.40
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Thermostat Housing Gasket, BMW - E60 M5, E63 M6

Genuine replacement gaskets for the thermostat housing on each bank. Replaces BMW part #11537834168.

Price: $16.29

17.15
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OEM Coolant Thermostat - N47/N57 Diesel - F30 F31 F10 F02 F25 F15

OEM coolant thermostat for models with the N47 or N57 diesel engine.

Price: $16.99

93.36
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Thermostat for Transmission Cooler - E53 X5 4.4i 4.6is 4.8is (2002-2006)

Original BMW thermostat controls fluid flow to the transmission oil cooler.

Price: $95.54

100.57
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Engine Coolant Thermostat - Mahle - N51 N52 N54 Engines

OEM-quality thermostat for engine cooling on BMW N51, N52, and N54 engines.

Price: $61.99

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