Brake Light Switch Inspection and Replacement
The brake light switch is located in the footwell, near the brake pedal support.
INSPECTION
1. If the brake lights do not come on, check the fuse first. Then check the bulbs. If the bulbs are good, check the brake light switch.
2. Remove the footwell cover (above the pedal).
3. Disconnect the brake light switch connector by squeezing the locking tabs.
4. Turn the ignition on.
5. Connect both terminals in the brake light switch connector with a short jumper wire. If the brake lights do not come on, replace the brake light switch.
REMOVAL
1. Remove the lower cover on the left side of the footwell.
2. Disconnect the switch connector by squeezing the locking tabs. Refer to the accompanying illustration.
3. Press the brake pedal. Pull the plunger (1) and bushing (2) forward (3). Refer to the accompanying illustration.
4. In this position, squeeze the clip (4) and pull the switch rearward out of the holder.

INSTALLATION
1. Insert the switch with the bushing fully extended into the pedal support and secure it.
2. Insert the red safety bushing into the switch so that the collar of the bushing seats against the pedal support.
3. Connect the connector and lock it.
4. Check that the brake lights come on with the ignition on.
5. Install the lower cover.
Test yourself
A quick BMW 1 quiz: every answer comes with an explanation and a link to the manual page.