BMW Transmission Services

Schedule Service
Service Offers
Shop Tires Online

The service of BMW automatic transmissions is a critical process that significantly enhances your vehicle's performance. This essential service involves replacing the transmission fluid and changing the filter, with service intervals typically ranging from 40,000 to 60,000 miles, depending on the specific model.

The process begins with the precise removal of underbody panels to access the transmission pan. Next, we thoroughly drain the old fluid to eliminate any contaminants. We then replace the internal filter and pan gasket to ensure a perfect seal.

Attention to detail is crucial during this procedure; we meticulously clean the transmission pan and remove any metal debris from the magnets, which play an essential role in trapping particulates. Once all components are cleaned and readied, we refill the transmission with the appropriate BMW-approved fluid.

Throughout the refill process, we carefully monitor the fluid temperature to ensure the correct level is achieved. This meticulous approach guarantees your transmission operates smoothly and efficiently, ultimately extending its lifespan and enhancing your vehicle's overall performance. Thank you for trusting us with the care of your BMW.

A comprehensive BMW transmission service involves several essential steps designed to ensure your vehicle operates optimally and enjoys a long lifespan.

To begin, our experienced technicians conduct a meticulous inspection of the transmission pan and hoses, checking for any signs of leaks. We utilize advanced onboard diagnostics to identify any potential fault codes that may arise.

Next, we conduct a fluid analysis to assess the condition of the current transmission fluid based on its color, odor, and clarity. If the liquid is dark, brown, or emits a burnt smell, it signals the need for a service.

Following this evaluation, we drain the old transmission fluid and remove the transmission pan to replace the filter. It is also crucial to replace the gasket associated with the pan to avoid future leaks.

We then refill the system with new, BMW-approved transmission fluid, ensuring the level meets factory specifications while the engine runs and the transmission reaches the appropriate temperature.

Finally, we reset the transmission's adaptive learning settings, allowing it to optimize shift timing with the new fluid. To wrap up the service, we take your vehicle for a test drive to confirm that everything operates seamlessly. Your satisfaction is our top priority, and we are dedicated to delivering exceptional care for your BMW.


The Importance of Transmission Fluid

Transmission fluid is a crucial component that significantly impacts both the performance and longevity of a vehicle's transmission system.

Lubrication: One of the essential functions of transmission fluid is to provide critical lubrication for the various moving parts within the transmission. By establishing a smooth barrier, it effectively reduces friction and minimizes wear, enabling the mechanical components to operate efficiently and reliably.

Cooling: In addition to its lubrication properties, transmission fluid also serves as a vital coolant. It absorbs the heat generated by moving parts, thereby preventing overheating and preserving the integrity of the transmission. This function not only protects the system but also extends its operational lifespan.

Cleaning: Furthermore, the fluid plays a vital role in maintaining cleanliness within the transmission by effectively flushing out dirt, debris, and harmful contaminants that may accumulate over time. This proactive approach to cleanliness ensures that internal components remain in optimal condition and function optimally.

Hydraulic Pressure: Additionally, transmission fluid is crucial for generating and maintaining the hydraulic pressure necessary for smooth gear transitions. This pressure facilitates precise and responsive shifting, allowing the vehicle to operate seamlessly in response to the driver's commands.

These pivotal functions highlight the importance of regular maintenance and timely fluid changes. By adhering to these practices, one can significantly enhance the transmission's performance and longevity.


When Should It Be Addressed? 

It is essential to consult your owner's manual for the specific maintenance intervals applicable to your BMW model. While BMW previously regarded transmission fluid as "lifetime," many professionals now recommend changing it between 60,000 and 100,000 miles to help prevent future complications. Additionally, if you experience any difficulty in shifting gears, slipping, bucking, or unusual noises from the transmission, please seek a thorough professional assessment promptly. Taking these proactive steps ensures your BMW remains in optimal condition for years to come.


  1. Karl Knauz BMW

    407 Skokie Highway
    Lake Bluff, IL 60044

    • Sales: (847) 604-5000
Loading Map...

Get in Touch

407 Skokie Highway
Directions Lake Bluff, IL 60044

  • Service Department: (847) 604-5000

Service Department Hours

  • Monday - Thursday7:30 AM - 6:30 PM
  • Friday7:30 AM - 6:00 PM
  • Saturday8:00AM - 2:00PM