Brake Light Switch

Replace the brake light (brake pedal position) switch on a 2024 Model Y Performance. The switch sits at the top of the brake pedal assembly under the driver's dash and is a clip-in component — no fluid or HV work is involved.

Warnings

Tools required

Parts

• Brake pedal position / brake light switch × 1 — Manufacturer-specified switch for 2024 Model Y — match by part number on existing switch

Preparation

1. Park on level ground, place in P, and engage the parking brake via the touchscreen.
2. Exit ALL doors with the key fob/phone key 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 12V (or 16V on later 2024 builds) low-voltage battery. On 2024 Model Y the LV battery is accessed under the rear seat / forward of the rear seat base — refer to the in-car service mode location for your specific build.
4. DO NOT touch, cut, or pierce ANY orange cable — these are high-voltage and lethal.
5. If at any point you encounter an orange cable, an HV component, or are unsure if a system is de-energized: STOP and consult a Tesla-certified technician.
6. Place the driver's seat fully rearward and tilt the steering column up and out (use the touchscreen steering controls before LV disconnect, or do this manually if needed).
7. Have the replacement switch on hand and verify it visually matches the original before removal.

Procedure

1. 1

   Access the brake pedal area
   Lay on your back in the driver's footwell with a headlamp. Locate the brake pedal arm and follow it upward to the pedal bracket where the switch is mounted. The switch is a small plastic body with a plunger that contacts a tab on the pedal arm and has a low-voltage connector on its rear face.
2. 2

   Inspect mounting style before removal
   Identify whether the switch uses a quarter-turn locking collar, a clip-in retainer, or a threaded body with locknut. Do not force anything — Tesla switches in this family are typically quarter-turn or push-and-twist style. Note orientation of the connector and any anti-rotation tab for reinstallation.
   ⚠Do not depress or pull the brake pedal hard while the switch is partially removed — the plunger can shatter.
3. 3

   Disconnect the switch electrical connector
   Press the locking tab on the low-voltage connector and gently pull it straight off the switch. Do not pull on the wires. Inspect the pins for corrosion or backed-out terminals; if found, address before installing the new switch.
4. 4

   Release the brake pedal arm from the switch plunger (if applicable)
   Some designs require pulling the pedal slightly toward you by hand to clear the plunger from the pedal tab before the switch can be rotated out. Do this with light, controlled pressure only.
5. 5

   Remove the switch from the pedal bracket
   Per the mounting style identified in Step 2, rotate the switch counter-clockwise (typical quarter-turn) or release the retainer clip, then withdraw the switch from the bracket. Keep the old switch — confirm the replacement matches in body shape, plunger length, and connector keying.
   ⚠If the switch will not release with light effort, STOP and verify the retention method. Forcing it can crack the pedal bracket, which is not separately serviceable.
6. 6

   Pre-set / verify the new switch
   Many brake light switches are self-adjusting on first pedal application — the plunger sets its zero position when the pedal returns to rest. Do NOT pre-press the plunger before installation unless the manufacturer instructions for the replacement part specify otherwise.
7. 7

   Install the new switch
   Insert the new switch into the bracket aligned with the anti-rotation feature, then rotate or clip it into the locked position. Confirm it is fully seated and cannot be pulled out by hand. Reconnect the LV connector until it clicks.
8. 8

   Set switch position (if applicable)
   If the switch is a self-setting type, slowly press and release the brake pedal one full stroke to allow the plunger to ratchet to its correct zero. If the switch is a fixed-position type, torque any retaining hardware to OEM specification — refer to Tesla Service Manual.

Reassembly

1. Confirm the LV connector is fully latched and the wiring harness is routed away from the pedal arm's swept path.
2. Reconnect the 12V/16V low-voltage battery, torquing the terminal hardware to OEM specification — refer to Tesla Service Manual.
3. Reinstall any battery cover, retainer, and rear seat cushion if removed for LV access.
4. Allow the vehicle to wake fully (touchscreen boots and gear selector responds) before testing.

Verification

• With the vehicle awake and your foot OFF the brake, have a helper confirm the rear brake lights and high-mount stop lamp are OFF.
• Press the brake pedal — all three brake lamps should illuminate immediately and extinguish fully on release.
• Confirm the vehicle will shift out of Park only when the brake is pressed (Park interlock test). If it shifts without brake, or refuses to shift with brake pressed, the switch is misadjusted or miswired — re-inspect.
• On a safe road, verify that pressing the brake disengages Autopilot/Traffic-Aware Cruise Control and triggers regen behavior as expected.
• Check the touchscreen for any active alerts (e.g., 'Brake Light Fault', 'Cruise Control Unavailable'). Clear any one-time alerts and re-test.
• Reminder: Tesla recommends brake fluid service every 2 years regardless of mileage — note the date in your service log if due.

Related trouble codes on this vehicle

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