Replacement of an outer (body-mounted) tail light assembly on a 2024 Tesla Model 3 Performance. The Model 3 uses a split tail light design with an outer (quarter panel) and inner (trunk lid) section — this procedure covers the outer assembly, which is the most commonly damaged unit.

Warnings

Tools required

Parts

• Outer tail light assembly (LH or RH as required) × 1 — Tesla Model 3 2024 Performance outer tail lamp — match by side and refresh-year specification
• Replacement push-pin/clip set (in case existing clips break on removal) × 1 — Generic OEM-spec trunk liner pin/clip

Preparation

1. Park on level ground, place in P, engage parking brake.
2. Exit ALL doors with the key fob 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 Li-ion low-voltage) battery — on this 2024 Model 3, this is typically behind the right-rear seat back panel; confirm before opening any panels. Insulate the negative terminal so it cannot spring back.
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. Open the trunk and remove any cargo. Have the new tail light assembly unboxed and inspected for damage before removing the old one.
7. Apply painter's tape along the painted body edge adjacent to the tail light lens to protect the paint during removal.

Procedure

1. 1

   Access the rear trunk trim
   Open the trunk. On the affected side, peel back the trunk side trim panel by releasing its push-pin fasteners with a plastic trim tool. You only need to fold the trim back enough to access the rear of the tail light housing — full removal is not required.
2. 2

   Disconnect the tail light electrical connector
   Locate the wiring harness connector at the inboard rear of the tail light housing. Depress the locking tab and pull the connector straight off. Inspect the connector pins for corrosion or damage before setting it aside.
   ⚠Do not pull on the wiring — grip only the connector body. Damaged pins will require harness repair.
3. 3

   Remove the tail light retaining fasteners
   Through the trunk opening, locate the retaining nuts/bolts securing the outer tail light assembly to the body studs (typically 2-3 fasteners accessible from the trunk side). Remove using a 10mm socket with a short extension. Retain the hardware for reuse unless damaged.
   Torque spec

   Tail Light Bolts8 Nm (6 lb-ft)
4. 4

   Release the assembly from the body
   From outside the vehicle, grip the tail light assembly firmly at its inboard and outboard edges. Pull straight rearward (parallel to the vehicle centerline) with steady, even force to release the locating pins from their grommets. Do not twist or pry against the body.
   ⚠If the assembly does not release with moderate force, recheck for a missed fastener — do not increase pulling force or pry with a metal tool against the aluminum quarter panel.
5. 5

   Inspect mounting points and gasket surface
   With the old assembly removed, inspect the body-side locating grommets, mounting studs, and the foam gasket landing surface. Clean any debris or old foam residue. Verify the new assembly's foam gasket is intact and properly seated before installation.
6. 6

   Test-fit the new assembly
   Align the locating pins of the new tail light to the body grommets and gently push it into place by hand to confirm correct fitment and flush alignment with the surrounding panels. Remove again to route the connector before final installation.
7. 7

   Connect the wiring harness
   Plug the body harness connector into the new tail light. Ensure the locking tab clicks fully into engagement. A partially-seated connector will cause intermittent fault codes on the instrument cluster.
8. 8

   Seat the new tail light and install fasteners
   Push the assembly firmly into the body until the locating pins are fully home and the gasket is evenly compressed. Install the retaining fasteners by hand first to avoid cross-threading, then torque to specification.
   ⚠Do not overtighten — the housing mounts thread into plastic-reinforced bosses or captive nuts; over-torque will crack the housing.
   Torque spec

   Tail Light Bolts8 Nm (6 lb-ft)
9. 9

   Reinstall trunk trim
   Fold the trunk side trim back into position and re-seat all push-pin fasteners. Replace any clips that broke during removal.

Reassembly

1. Confirm trunk trim is fully seated with no gaps.
2. Reconnect the 12V/low-voltage battery negative terminal and torque to specification.
3. Close the trunk and verify it latches and aligns correctly with the new tail light.
4. Allow the vehicle 1-2 minutes to fully wake up after 12V reconnection before testing lights.

Verification

• With the vehicle awake (driver seated, brake pressed), verify all tail light functions on the replaced side: running/marker lamp, brake lamp, turn signal, and reverse lamp.
• Compare brightness and color temperature against the opposite side — significant mismatch indicates the wrong part variant was supplied.
• Walk around the vehicle and inspect the panel gap between the new tail light and the quarter panel/trunk lid — gaps should be even and the lens should sit flush.
• Check the central touchscreen for any lighting-related alerts or fault messages.
• Test in the rain or with a hose: the foam gasket must seal — verify no water enters the trunk side trim area.
• Note: this job is not part of a scheduled Tesla service interval, but while the trunk trim is open, it is a good time to check the 12V battery condition (3-5 year typical life on AGM units) if accessible.

More procedures for this vehicle