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How to change brake fluid on a Porsche Cayenne (2003-2018)

Maintenance Interval: Every 2 years regardless of mileage

Dealer Cost: ~$250

DIY Cost: ~$20 (after initial purchase of tools)

Difficulty: Easy 

Repair Time: 1.5 hours

Overview:

Over time, brake fluid can absorb moisture and  air can get into the system, which will result in more spongy braking. Every 2 years, Porsche recommends replacing your vehicle's brake fluid. Overall, this is an easy procedure that someone with some experience working on cars can do. To perform this DIY, check out the helpful tutorial above from YouTuber, CarFanatic. While the video covers the procedure on a Porsche 911, the steps for the Cayenne are virtually the same. Detailed steps can be found below.

Instructions:

  1. Gather tools and brake fluid; while you only need 1 liter of fluid for the job, it's a good idea to have an extra 1 liter of fluid just in case.
     

  2. Setup the power brake pressure bleeder.

    1. ​Fill it with 0.9 liter of brake fluid; save the 0.1 liter of fluid to top off your reservoir at the end.

    2. Then pressurize it to 15 psi.
       

  3. Connect the power brake bleeder to your brake fluid reservoir.

    1. Pop your vehicle's hood.

    2. Remove a plastic panel on the driver side towards the windshield cowl to reveal the brake fluid reservoir.

    3. Unscrew brake fluid reservoir cap and remove mesh filter; you DO NOT need to extra brake fluid from the reservoir.

    4. Screw on the power brake bleeder adapter onto the brake fluid reservoir.

    5. Connect the power brake bleeder to the adapter using the supplied hose and fitting
       

  4. Next proceed to bleed each brake caliper in THIS EXACT ORDER and drain the following amounts:

    1. Rear passenger side - 0.3 liter (split 50/50 for outer & inner nipples)

    2. Rear driver side - 0.25 liter (split 50/50 for outer & inner nipples)

    3. Front passenger side - 0.15 liter (split 50/50 for outer & inner nipples)

    4. Front driver side - 0.1 liter  (split 50/50 for outer & inner nipples)
       

  5. To bleed your brake caliper, follow these steps:

    1. You will need to remove your wheels to access the brake calipers. Either jack up the entire car and remove all 4 wheels or remove one wheel at a time while you do each corner.

      Note: If you have air suspension and decided to jack up the car, you will need to lock the air suspension by starting the car and holding the air suspension button up for 10 seconds. You will see an indicator pop up on your gauge cluster.
       

    2. Drain the outer and inner brake caliper nipples by connecting the catch can and loosening the nipples with an 11mm wrench.

    3. When you are done draining a nipple, hand tighten the nipple. DO NOT OVER-TIGHTEN! THESE SHOULD BE ONLY SNUG.
       

  6. After draining each caliper, put your wheels back on and get the vehicle back on the ground. 
     

  7. Depressurize the power brake bleeder and disconnect it from the brake fluid reservoir.
     

  8. Top off the brake fluid reservoir as needed to get the level just under the "max" line.
     

  9. Re-install the brake fluid reservoir filter, cap, and plastic cover.
     

  10. Clean-up and put return all of your tools and supplies.
     

  11. You're all done!