Changing Brake Fluid

2026-02-09 - on a BMW Motorcycle

Hello everyone! Welcome to a new DIY tip from Hornig.

 

Today we'll show you how to easily change the brake fluid in the upper reservoir of your BMW. Safety comes first, so this change is essential for braking performance!

What you'll need: New brake fluid – you can find our high-quality option from our shop, as always, via the link in the description. You'll also need a syringe, an empty container, a suitable wrench for the bleed screw, a screwdriver for the reservoir cap, and a clean cloth.

Before you begin, adjust the handlebars so that the brake fluid reservoir is level. Very important: Place a cloth under the reservoir. Brake fluid is corrosive and can damage paint!

Now we open the cap. The original reservoir cap usually indicates the required brake fluid standard, for example, DOT 4 or DOT 5. Make sure you use the correct standard!

Now remove the old, often dark, brake fluid. The best way to do this is carefully with a syringe. Pour the old fluid directly into an empty, labeled container for later disposal.

Fill the reservoir with the new brake fluid. And now for the most important step: bleeding the brakes.

 

First step: Pump the brake lever several times until you feel firm pressure.

 

Second step: Hold the brake lever down.

 

Third step: Now slightly open the bleed screw at the bottom of the brake caliper. The brake lever will then move all the way to the grip.

 

Fourth step: Close the screw immediately! Only then release the brake lever.

 

Repeat this process until only new, clear brake fluid comes out of the entire system. Keep checking the upper reservoir and refill with fresh fluid as needed to prevent air from entering the system!

Caution! If your BMW has two brake calipers, you must repeat this entire process on the other side.

Once everything is clear and you have the desired brake feel, the change is complete. Now thoroughly clean the cap and the rubber seal and allow them to dry completely. If the seal is damp, leaks can occur later.

 

At Hornig, we naturally place the highest value on product quality, precision fit, and durability. This is our promise to ensure you achieve maximum value retention and appreciation for your BMW motorcycles.

Remember: The best brake fluid is useless without proper maintenance and the right accessories. So, visit our shop and buy what will keep your BMW happy!

 

If this video helped you, give us a like and subscribe to the channel for more DIY tips! See you in the next video!

At Hornig, we naturally place the highest value on product quality, precision fit, and durability.

 

Link to Brake Fluid: https://www.motorcycleparts-hornig.com/Search.html?q=S.PFB+550

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