How to install a new brake switch on a Renault Kangoo?

If all the brake lights stop working simultaneously, the most likely cause is the brake pedal switch, a small plastic component that can be found on Amazon with the code B0FMF9C452 for £13.26, with free delivery for Prime customers. Before replacing it, it is useful to check the fuses and relays, but it is rare for them to be the cause.

The switch is located in the driver's footwell, attached to the brake pedal support. The procedure does not require tools: with your hand, locate the switch above the pedal, disconnect the electrical connector, then rotate it a quarter turn (anti-clockwise) to detach it from the bayonet mount.

Remove the old switch, reconnect the connector to the new one, and insert it into the mount by rotating it clockwise until it clicks. The new switch may require adjustment.

The correct procedure is: fully pull out the rod of the new switch, mount it on the support, then press the brake pedal fully and release it: the pedal itself will automatically adjust the length of the rod. After installation, test the brakes. If the lights only come on when the pedal is fully pressed, a small adjustment (pulling the rod in increments) may be necessary.