Replace the brake light switch on a 2024 Tesla Cybertruck Cyberbeast. The switch is mounted to the brake pedal assembly bracket under the driver's side dash and signals brake-apply to the vehicle's controllers over the low-voltage network.

Warnings

Tools required

Parts

• Brake light / brake pedal position switch (OEM Cybertruck-specific) × 1 — Refer to Tesla EPC for 2024 Cybertruck brake pedal switch — do not substitute Model 3/Y/S/X switches

Preparation

1. Park on level ground, place the vehicle in P, and engage the parking brake.
2. Exit ALL doors with the key fob/phone key carried well away from the vehicle. Wait at least 2 minutes for HV systems to fully de-energize, even on this non-HV job.
3. Disconnect the low-voltage battery. NOTE: This Cybertruck uses a 48V low-voltage architecture (not 12V). Locate the 48V auxiliary battery per the architecture notes and disconnect the negative terminal using insulated tools. Verify with a 48V-rated meter that the disconnect is complete before proceeding.
4. Do NOT touch, cut, or pierce any orange cable. If you encounter an orange cable, an HV component, or are unsure if a system is de-energized: STOP and consult a Tesla-certified technician.
5. Move the driver's seat fully rearward and tilt the steering yoke up/away to gain access to the brake pedal area.
6. Have a flashlight ready — the switch is mounted at the upper rear of the brake pedal bracket, behind the lower dash trim.

Procedure

1. 1

   Remove driver's lower dash trim
   Using plastic trim tools, gently release the driver's side lower dash / knee bolster panel. Work around the perimeter to release clips evenly to avoid cracking the panel. Disconnect any low-voltage harness connectors attached to the panel before fully removing it.
   ⚠Cybertruck interior trim clips can be brittle in cold weather — warm the cabin or work slowly to avoid breaking clips.
2. 2

   Locate the brake light switch
   Looking up at the brake pedal assembly, identify the brake light / pedal position switch. It is mounted to the manufacturer-specified bracket on the upper portion of the pedal box, with its plunger contacting a tab on the brake pedal arm. Note the orientation and clocking of the switch before removal.
3. 3

   Disconnect the switch electrical connector
   Depress the connector locking tab and pull the harness connector straight off the switch. Inspect the connector pins for corrosion, bent terminals, or signs of moisture. Do not pull on the wires.
4. 4

   Remove the old switch
   Most Tesla brake light switches use a quarter-turn bayonet retention into a clip on the pedal bracket. With the brake pedal at rest, rotate the switch counterclockwise approximately 1/4 turn (or per OEM direction) to unlock it from the retainer, then withdraw it from the bracket. If the design uses a threaded body or fastener instead, remove per OEM specification — refer to Tesla Service Manual.
   ⚠Do not press the brake pedal during removal — the plunger is spring-loaded and will fully extend, complicating reinstallation.
5. 5

   Compare new switch to old
   Place the new switch next to the old one. Verify identical body shape, plunger length, connector keying, and any self-adjusting collar features. A wrong-part switch on a brake-by-wire vehicle can cause persistent fault codes and disable driver assistance features.
6. 6

   Install the new brake light switch
   With the brake pedal fully at rest (not depressed), insert the new switch into the bracket retainer in its unlocked orientation. Many Tesla-style switches self-adjust on first pedal stroke: install with the plunger pre-extended, then rotate to lock per OEM direction. After locking, slowly press and release the brake pedal one time to allow the switch to self-set its zero position. Torque any retaining fastener (if applicable) to OEM specification — refer to Tesla Service Manual.
7. 7

   Reconnect electrical connector
   Push the harness connector squarely onto the switch until the locking tab clicks fully home. Give a light tug to confirm the lock has engaged.

Reassembly

1. Reinstall the driver's lower dash / knee bolster panel, reconnecting any harness connectors before seating clips.
2. Press the panel evenly along its perimeter until all clips seat — listen for each click.
3. Reconnect the 48V low-voltage battery negative terminal using insulated tools. Torque battery terminal hardware to OEM specification — refer to Tesla Service Manual.
4. Close the battery service area and reinstall any covers.

Verification

• With the vehicle powered on and foot OFF the brake, walk to the rear of the truck (or use a helper / reflective surface) and confirm brake lamps are OFF.
• Press the brake pedal — confirm both rear brake lamps and the high-mount stop lamp illuminate immediately and extinguish cleanly when released.
• Confirm you can shift out of P (shift interlock requires a valid brake input on Cybertruck).
• Confirm cruise control / Autopilot can be engaged on a test drive — these systems are inhibited if the brake switch reports faults.
• Check the touchscreen for any active alerts. If a fault was stored, drive the vehicle through a key cycle or use a scan tool to clear chassis DTCs.
• Reminder: Tesla recommends brake fluid service every 2 years regardless of mileage — if you're already under the dash, check the brake fluid service date in the vehicle's service history and schedule if due.

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