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BMW Engine Coolant Thermostat (75 Deg) - Wahler 423675

BMW/Mini OE: 11537511580

Engine Coolant Thermostat (75 Deg) 423675 Main Image
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SKU: 423675
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Engine Coolant Thermostat (75 Deg) by Wahler

Engine Coolant Thermostat (75 Deg) by Wahler

Your engine coolant thermostat sits between the engine and the radiator, in a thermostat housing. The thermostat blocks the flow of coolant to the radiator until the engine has warmed up. Once the engine is warm enough, usually around 200-220 degrees F, the thermostat opens and allows the coolant to flow. The engine coolant thermostat is the most common component of the cooling system to fail, which can cause your car to overheat in the unlikely event it were to be stuck closed. More commonly, the thermostat can be stuck open, making it difficult for your engine to warm up. This can result in your car running cool, causing an overly rich fuel mixture and an inefficient running engine. It should be replaced anytime you have major work done to the coolant system.

BMW/Mini OE No.
Current No.: 11537511580 Prior No.: 11531721002® carries an extensive catalog of aftermarket, OEM, original, and genuine parts from over 200 manufacturers. We are also constantly updating our Wahler parts selection to give you the best possible selection of parts.

If there is anything you cannot find in our catalog please call® at (800) 467-9769 and our knowledgeable customer service team will help you locate the part you need, fast.

Country of Manufacture: Germany
Manufacture Quality: OEM
Shipping Weight (lbs): 0.250

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About Wahler

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When it comes to automotive systems engineering, Wahler has been there nearly since the beginning, pioneering technologies that modern systems would never be able to survive without. The first patent that this German company owns is a pretty important one, and is written as the "Thermostatic Regulation of the Coolant Circuit of Internal Combustions Engines'. You would know this as the common Thermostat, and it started a long tradition of developing and building technology to regulate the temperature of your engine, an absolutely crucial aspect that impacts both reliability and efficiency.

Since the 30's, Wahler has branched out to other regulatory components, but never strayed far from its roots. Today, Wahler manufacturers OEM, OES, and aftermarket components in Germany to the highest quality standards possible. A favorite brand in the automotive service industry, when you put Wahler parts in your car, you can rest easy knowing you are installing the best quality parts available.

If this is not the exact Engine Coolant Thermostat (75 Deg) you are looking for, or you would like this part in a brand other than Wahler, please call us at (800) 467-9769 and one of our customer service experts will help you locate the exact part you need.

Vehicle Fitment & Notes

Click a year range, make, and model below for additional information.

+ BMW 318i 1991-1995

+ BMW 318is 1991-1995

+ BMW 318ti 1995-1995

+ BMW 325i 1992-1995

+ BMW 325is 1992-1995

+ BMW 525i 1991-1995

+ BMW 525iT 1993-1993

+ BMW M3 1995-1999

Warranty® is pleased to offer a one (1) year warranty on all parts. Your Engine Coolant Thermostat (75 Deg) may be exchanged if it is defective within 365 days of your purchase date. Defective parts are only eligible for an exchange or store credit. No cash refunds will be issued for previously installed parts.

After one (1) year® will honor any extended manufacturer warranties. No exchange will be offered outside of the manufacturer's warranty process. Parts covered by the manufacturer warranty need to be exchanged through the manufacturer and may take up to 4-6 weeks.

If you would like to initiate a warranty claim or have questions about the process, please call us at (800) 467-9769 and a knowledgeable customer service expert will assist you.

Delivery & Returns

Delivery Info® proudly offers FREE shipping available on most orders. Some weight and size restriction apply. We also provide inexpensive and guaranteed 3 day, 2 day, and Overnight shipping options, so if you need your Engine Coolant Thermostat (75 Deg) tomorrow,® can deliver!

Every® order is fast, reliable, and track-able, meaning you'll know exactly where your Engine Coolant Thermostat (75 Deg) is at every step of the delivery process.® also displays your Expected Ship Date and transit time in your Cart, making our entire shipping process simple and transparent.

Every order consisting of all "In Stock" parts received before 5 PM ET Monday – Friday will ship the same business day. Every order consisting of all "In Stock" parts received after 5 PM Monday – Friday will ship the next business day.® stocks and ships all of our parts from our warehouse in Windsor, CT. Do not be fooled by drop shippers that claim to have everything and then hit you with three delivery charges. All of our parts come in the same box quickly and via your chosen delivery method and carrier. That's the® stock and ship advantage.

Returns Info® proudly offers a ninety (90) day cash return for all items purchased through®. The item must be new and in its original manufacturer packaging to be eligible for a cash refund.

If you would like to return an item or have questions about the process, please call us at (800) 467-9769 and one of our customer service experts will be happy to help.