BMW Auto Trans Oil Cooler - Genuine BMW 17218619387

Product Information

BMW Automatic Transmission diagram for 540i, 740i, 540i xDrive, 530e xDrive, 530e, & more

An automatic transmission oil cooler is a heat exchanger that helps regulate the temperature of transmission fluid. It works by circulating the hot transmission fluid through a cooler (often located in front of the radiator or as part of it), where air or coolant lowers the fluid temperature before it returns to the transmission. Keeping transmission fluid cool is essential for preventing overheating, reducing wear, and extending the lifespan of the transmission.

• Overheating transmission – warning lights, slipping gears, or loss of power due to fluid running too hot.
• Fluid leaks – puddles or wet spots under the vehicle near the cooler or cooler lines.
• Contaminated fluid – coolant mixing with transmission fluid (milky appearance) or debris in the fluid leading to shifting problems.

About Genuine BMW

The original parts used by BMW to build your car are available as replacement parts under the “Genuine BMW” brand. When ordering a Genuine BMW part you are guaranteed to get the same part that you would pick up from your local dealerships part department. Genuine BMW parts have been built to BMW’s stringent standards and are the same quality of the original parts used to build your Ultimate Driving Machine.

You may not realize this, but the parts that make up your BMW are not necessarily manufactured by BMW. No cause for concern, as BMW designs the part, hires a manufacturer, and ensures its quality to you. In fact, many of these manufacturers have been making parts for BMW for decades. In our industry these manufacturers are called OEM (Original Equipment Manufacturers), and these are often brands you recognize, including Lemforder, ZF, Sachs, Bosch, Valeo, Zimmermann, Siemens VDO, Corteco, and more. Don’t be surprised to open that Genuine BMW parts box and find an OEM branded part inside, simply with the addition of a BMW logo.

Be sure to keep an eye out for OE tags on our product pages to quickly identify parts coming direct from OE manufacturers. That extra bit of insight could save you some serious money while shopping! Refer to our OE Academy for further information regarding the OE/OEM tags throughout the site.