Skip to main content
HTCOHow To Change OilSearch

How to Change the Transmission Fluid on a BMW 5 Series

By Rae CastellanoEngines & Vehicles Writer

Understanding Transmission Fluid Changes

Transmission fluid keeps your BMW 5 Series' transmission running smoothly. Over time, this fluid breaks down and loses its ability to protect your transmission's moving parts. Changing the fluid at the right intervals can help maintain your vehicle's performance.

When to Change Your Transmission Fluid

BMW recommends checking your owner's manual for the specific service schedule for your model year. Most 5 Series vehicles need transmission fluid changes between 60,000 and 100,000 miles, though some newer models may have longer intervals. Regular checks can help you spot when the fluid needs attention.

Tools and Materials You'll Need

Before starting, gather these items:

  • Jack and jack stands (or ramps)
  • Socket set and wrenches
  • Drain pan
  • New transmission fluid (check your manual for the correct type)
  • Transmission fluid filter (if applicable to your model)
  • Gasket scraper or plastic tool
  • Shop towels or rags
  • Torque wrench

Step-by-Step Process

Prepare Your Vehicle

Park your 5 Series on a level surface and let the engine cool. Raise the vehicle using a jack and secure it with jack stands. Never rely on a jack alone. Remove the undertray to reach the transmission pan.

Locate the Transmission Pan

The transmission pan sits underneath the transmission. Consult your owner's manual or a service guide for the exact location on your specific model year, as it can vary.

Drain the Old Fluid

Position your drain pan under the transmission pan. Loosen the bolts holding the pan in place, starting with the corners and working toward the center. Lower the pan slowly to avoid spilling fluid. Let all the old fluid drain completely into the pan.

Replace the Filter and Gasket

Remove the old transmission filter and replace it with a new one. Clean the transmission pan with a shop towel. Remove the old gasket completely and inspect the pan for damage. Install a new gasket on the pan.

Reinstall the Pan

Position the transmission pan back in place and install the bolts. Tighten them in a crisscross pattern to ensure even pressure. Use a torque wrench set to the specification in your manual—typically between 7 and 10 foot-pounds for BMW transmissions.

Add New Transmission Fluid

Locate the transmission fluid filler cap or dipstick under the hood. Add the recommended type and amount of new fluid. Check your manual for the exact quantity. Start the engine and let it run briefly, then check the fluid level and add more if needed.

Important Considerations

Transmission work requires precision and attention to detail. If you're not comfortable working on your vehicle, a BMW specialist or may have access to mechanic can perform this service. Improper fluid or installation can affect how your transmission performs.

Always dispose of old transmission fluid responsibly. Many auto parts stores and recycling centers will take used fluid for free or a small fee.

Learn More

Your BMW 5 Series owner's manual contains specific details for your model year, including exact fluid types, capacities, and torque specifications. A service manual for your particular year and engine type can provide additional guidance and diagrams.