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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.
Mishimoto makes coolant tanks, radiators and much more for your Mini/BMW. Established in 2003 their commitment to absolute quality in the aftermarket world is evident through the quality and performance enhancing products they offer.
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
BMW & MINI Universal Oil Cooler - 10 Row is a versatile cooling solution designed to enhance the performance and reliability of BMW and MINI vehicles. This high-quality oil cooler provides efficient cooling for the engine oil, ensuring optimal operating temperatures and extending the life of vital engine components.
Crafted with precision engineering and durable materials, the BMW & MINI Universal Oil Cooler - 10 Row is compatible with a wide range of BMW and MINI models, offering versatility and ease of installation. It effectively dissipates heat from the engine oil, reducing the risk of overheating and engine damage.
Investing in the BMW & MINI Universal Oil Cooler - 10 Row is a smart choice for BMW and MINI owners looking to improve their vehicle's performance and longevity.
Universal Oil Cooler Black - 10 Row is engineered to maintain optimal oil temperatures and ensure peak engine performance under various driving conditions. This high-performance oil cooler effectively reduces oil temperatures, preventing a drop in pressure and maintaining proper engine lubrication. Featuring a robust 10-row design, it offers superior cooling efficiency compared to standard coolers.
WARNING! Prop 65 may apply to this product. Proposition 65 (Safe Drinking Water and Toxic Enforcement Act of 1968) is a California law that applies to all companies selling products in California. Prop 65 requires any listed chemical present above very low levels that are known to cause cancer, birth defects, or other reproductive harm. For more information about California Prop 65 warning see: www.P65Warnings.ca.gov.
Upgrade your Mini Cooper S with Mishimoto radiator hoses, crafted from high-grade silicone and heat-resistant embedded fibers. These hoses offer superior performance and durability compared to OEM rubber hoses, with increased pressure tolerance and a choice of black, blue, or red colors. Mishimoto stands behind their product with a no-questions-asked warranty, covering damage from accidents. Say goodbye to worries about hose replacements with Mishimoto radiator hoses.
WARNING! Prop 65 may apply to this product.
Proposition 65 (Safe Drinking Water and Toxic Enforcement Act of 1968) is a California law that applies to call companies selling products in California.
Prop 65 requires any listed chemical present above very low levels that are known to cause cancer, birth defects, or other reproductive harm.
For more information about California Prop 65 warning see: www.P65Warnings.ca.gov.
Elevate your Mini's performance with this lower temperature thermostat, perfect for racing or demanding everyday setups requiring cooler thermostat settings. Specifically crafted for the 2002–2008 Gen 1 Mini Cooper, this thermostat significantly enhances cooling efficiency by reducing high engine temperatures. Operating at 180°F, lower than standard thermostats, it ensures early coolant flow through the engine, effectively lowering overall engine temperatures. Digitally calibrated for precise and consistent operation, this thermostat comes with a Lifetime Warranty. Please note, Proposition 65 (Safe Drinking Water and Toxic Enforcement Act of 1968) may apply to this product. For more details about California Prop 65 warnings, visit www.P65Warnings.ca.gov.
Even under ideal driving conditions, elevated oil temperatures can lead to decreased lubrication efficiency and pressure. With this oil cooler, you can maintain optimal oil temperatures for peak driving performance.
*WARNING: This product may be subject to Proposition 65 regulations in California. For more information, visit www.P65Warnings.ca.gov.
Elevate your BMW Cooper S radiator hoses with Mishimoto's premium silicone and heat-resistant embedded fiber combination. These hoses, available in black, blue, or red, ensure OEM fitment while boosting pressure tolerance for improved performance and aesthetics. Mishimoto's no-questions-asked warranty provides coverage for damages, including those from accidents, ensuring lasting reliability. Please note, Prop 65 warnings may apply to this product.
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
Upgrade your Mini Cooper S radiator hoses with Mishimoto's high-quality silicone replacement kit. Made from a blend of premium silicone and heat-resistant embedded fibers, these hoses offer superior durability and performance compared to OEM rubber hoses. Choose from black, blue, or red options to match your Mini's style while retaining OEM fitment. Plus, Mishimoto's no-questions-asked warranty policy ensures coverage, even for vehicles involved in accidents. With Mishimoto radiator hoses, you're getting the ultimate combination of performance, style, and peace of mind.
WARNING! Prop 65 may apply to this product.
Proposition 65 (Safe Drinking Water and Toxic Enforcement Act of 1968) is a California law that applies to call companies selling products in California. Prop 65 requires any listed chemical present above very low levels that are known to cause cancer, birth defects, or other reproductive harm.
For more information about California Prop 65 warning see: www.P65Warnings.ca.gov.
Upgrade your Mini's engine with the MINI R52 R53 Silicone Hose Kit in Red. This kit offers durability and performance, making it an ideal choice for enthusiasts.