How to replace the rear hydraulic brake for Q7/E300

Replacing the rear hydraulic brake can be a bit intricate, but it is not difficult. If you need to replace the rear hydraulic brake, you can follow the steps I provide to complete the replacement. I highly recommend visiting our YouTube channel and watching the instructional video on brake replacement for visual guidance.

Tools required: Multi-function hex wrench, zip ties, scissors

Step 1: Remove the battery.

Step 2: Disconnect the right rear brake wiring.

Step 3: Remove the grip, throttle handle, and right rear brake lever.

Step 4: Remove the right brake oil hose. You can use tape to seal the hose to prevent oil leakage.

Step 5: Flip the bike over.

Step 6: Remove the inner cover of the battery.

Step 7: Remove the battery knob.

Step 8: Remove the three hex screws on the seat of the battery base and remove the battery seat.

Step 9: Remove the three hex screws on the bottom seat of the battery base.

Step 10: Remove the left side cover.

Step 11: Cut the zip tie securing the entire wire and remove the oil hose from the controller.

Step 12: Cut the zip tie securing the motor wires.

Step 13: Remove the right rear brake caliper.

Step 14: Install the new right rear brake caliper.

Step 15: Arrange the wire routing and install the battery seat.

Step 16: Secure the entire wire with zip ties and secure the battery inner cover.

Step 17: Secure the motor wires and brake lines with zip ties.

Step 18: Install the left side cover.

Step 19: Flip the bike back over.

Step 20: Install the right rear brake lever, throttle handle, and grip.

Step 21: Insert the new oil hose.

Step 22: Connect the right rear brake wiring.

Please note that it is recommended to watch the instructional video on our YouTube channel for visual guidance during the process.