2026-06-12

Cast Rear Under Body (1-Piece)

Correction code: 10102101202 NOTE: Unless explicitly stated in the procedure, the above correction code includes all Collision Repair and Service repair work required to perform this procedure, including the linked Collision Repair procedures and linked Service procedures. Do not stack Collision Repair correction codes unless explicitly told to do so. Depending on the damage to the vehicle, additional repairs may be required.

Repair Information

Review all collision repair general practices and safety documentation and wear the appropriate PPE (Personal Protective Equipment) before beginning this procedure.
Depending on the damage to this component, it may be possible to repair this component. Refer to Cast Rear Under Body (1-Piece) Repair Guidelines for more information.
Properly mount the vehicle on a frame bench when performing this procedure.

Parts List


Quantity	Description	Image / Notes
1	CAST RUB-SP E-COATED (Rear Under Body 1-Piece)
1	ASSEMBLY - EXTENSION REAR WHEEL HOUSE - LEFT HAND SERVICE E-COATED (Wheelhouse Extension - Front - LH)
1	ASSEMBLY - EXTENSION REAR WHEELHOUSE - RIGHT HAND SERVICE E-COATED (Wheelhouse Extension - Front - RH)
21	High Strength Structural Rivet, 6.5 mm
12	Rivet, 4.8 mm
12	Bolt , BOLT&WSHR[FL],M8-1.25x32	Tesla part number 1119448-00-A.
2	NUT AND WASHER[FL] - HF - M8-1.25 - [10] - ZINC NICKEL	Tesla part number 1118837-00-A.
2	SEMS,[FL],HX,M8x23.5,[109],G1009,PTC	Tesla part number 1063260-00-C.

When ordering parts, refer to the Parts Catalog and enter the VIN of the vehicle being repaired to find the correct parts (and the part numbers) for the vehicle. Alternatively, use the search function in the Parts Catalog to find a specific part for the vehicle.

Repair Procedure

Remove the Carrier - Rocker Panel - LH (Remove and Replace).

Note
Remove the LH and RH rocker panels.
Remove the Trunk Assembly - Lower (Remove and Replace).
Remove the Noise Absorber - Motor Bay - Rear (Remove and Replace).
Remove the Busbars - Charge Port to HV Battery (Remove and Replace).
Remove the Wheelhouse Insulator - Rear - RH (Remove and Replace).
Remove the Insulator - Wheelhouse - LH (Remove and Replace).
Remove the Pipe - Brake - Rear - LH (Remove and Replace).
Remove the Brake Lines - Rear - RH to Sill (Structural Pack) (Remove and Replace).
Remove the Brake Lines - 2 Tube Bundle - Rear (Remove and Replace).
Remove the HV Battery (RWD) (Structural Pack) (Remove and Replace).
Remove the LH and RH Rear Panel Side Assembly (for 1-Piece Cast Under Body).
Remove the LH and RH Wing Bracket (Lower).
Create an access window in the Wheelhouse Extension (Front).
- Reference Line/Point A = 50 mm B = 130 mm C = 75 mm D = 21 mm
Cut the new Wheelhouse Extension components to create LH and RH access window covers.
The finished cover should be approximately 32 mm. wider and 10 mm. taller than the access window. Black dashed lines indicate the access window.
Note
When positioned properly, the cover overlaps the top, bottom, and inboard edges of the access window by 5 mm . The cover also overlaps the outboard edge of the access window by 27 mm.
- Reference Line/PointE = 82 mmF = 140 mm
Remove the Rivnut from the new component.
- Rivnut
Remove the original component.
- or Factory SPRs
- Rivnut
- or Bolts
Remove the original component.
- or Factory Spot Welds
- or Factory SPRs
Remove the original component.
- or Bolts
Remove the original component.
- or Factory SPRs
Prepare for installation.
- or Bolts
- Nut
Install the nut (Tesla part number 1118837-00-A) though the B Pillar hole where the seat belt retractor is located (indicated in red).
Prepare for installation.
Note
A red X indicates a location where a factory-installed fastener is not being replaced.
- or Rivets, 4.8 mm
- or High Strength Structural Rivets, 6.5 mm
Prepare for installation.
Note
A red X indicates a location where a factory-installed fastener is not being replaced.
- Reference Line/Point
- or Rivets, 4.8 mm G = 79 mm H = 24 mm I = 28 mm J = 26 mm
Prepare for installation.
Note
A red X indicates a location where a factory-installed fastener is not being replaced.
- Reference Line/Point
- or High Strength Structural Rivets, 6.5 mm K = 17 mm
- or Bolts
Prepare for installation.
Note
A red X indicates a location where a factory-installed fastener is not being replaced.
- or High Strength Structural Rivets, 6.5 mm
Apply structural adhesive to the mating surfaces on the vehicle and the new component or components.
Install the new component or components.
Torque bolts as follows:
- SEMS,[FL],HX,M8x23.5,[109],G1009,PTC bolt and washer (Tesla part number 1063260-00-C) installed horizontally in the Sill: 31 Nm.
- Bolts vertically installed in the Sill: 35 Nm.
- Bolts horizontally installed in the Sill: 31 Nm.
Install the LH and RH Rear Rail End Plate (For 1-Piece Cast Under Body).
Install the LH and RH Wing Bracket (Lower).
Prepare to install the Access Window Covers.
- or Rivets, 4.8 mm
Note
When positioned properly, the cover overlaps the top, bottom, and inboard edges of the access window by 5 mm . The cover also overlaps the outboard edge of the access window by 27 mm.
Apply structural adhesive to the mating surfaces on the vehicle and the Access Window Covers.
Install the Access Window Covers.
Install the Rear Panel Side Assembly (for 1-Piece Cast Under Body).
Perform any necessary post-repair operations.
Install the HV Battery (RWD) (Structural Pack) (Remove and Replace).
Install the Brake Lines - 2 Tube Bundle - Rear (Remove and Replace).
Install the Brake Lines - Rear - RH to Sill (Structural Pack) (Remove and Replace).
Install the Pipe - Brake - Rear - LH (Remove and Replace).
Install the Insulator - Wheelhouse - LH (Remove and Replace).
Install the Wheelhouse Insulator - Rear - RH (Remove and Replace).
Install the Busbars - Charge Port to HV Battery (Remove and Replace).
Install the Noise Absorber - Motor Bay - Rear (Remove and Replace).
Install the Trunk Assembly - Lower (Remove and Replace).
Install the Carrier - Rocker Panel - LH (Remove and Replace).

Note
Install the LH and RH rocker panels.