2026-03-17

Cover - Ancillary Bay (Remove and Replace)

Correction code 1630012202 FRT 0.90 NOTE: Unless otherwise explicitly stated in the procedure, the correction code and FRT listed above reflect all of the work required to perform this procedure, including the linked procedures. Do not stack correction codes unless explicitly told to do so. NOTE: See Flat Rate Times to learn more about FRTs and how they are created. NOTE: See Personal Protection to make sure you are wearing proper PPE when performing the procedure below. NOTE: See Ergonomic Precautions for safe and healthy working practices.

  • 2026-03-17: Removed the steps to install the probe lid; added the ancillary bay air leak test as a mandatory step for replacing the ancillary bay cover.
  • 2025-11-28: Added information for torque sequence.
  • 2025-10-13: Added warning at step to remove/install the ancillary bay cover to do this while standing outside the vehicle.
Warning IconA warning icon, calling your attention to a possibly risky situation
Warning
Remove all jewelry (watches, bracelets, rings, necklaces, earrings, ID tags, piercings, etc.) from your person, and all objects (keys, coins, pens, pencils, tools, fasteners, etc.) from your pockets before performing any procedure that exposes you to high voltage.
Warning IconA warning icon, calling your attention to a possibly risky situation
Warning
If corrective eyewear is necessary to safely perform any procedure, make sure that the eyewear is securely restrained to the head and cannot fall off.
Warning IconA warning icon, calling your attention to a possibly risky situation
Warning
Only technicians who have completed all required certification courses are permitted to perform this procedure. Tesla recommends third party service provider technicians undergo equivalent training before performing this procedure. For more information on Tesla Technician requirements, or descriptions of the subject matter for third parties, see HV Certification Requirements. Proper personal protective equipment (PPE) and insulating HV gloves with a minimum rating of class 0 (1000V) must be worn at all times a high voltage cable, busbar, or fitting is handled. Refer to Tech Note TN-15-92-003, High Voltage Awareness Care Points for additional safety information.

Torque Specifications

Table 1. Torque Specifications:Cover - Ancillary Bay (Remove and Install)
Description Torque Value Recommended Tools Reuse/Replace Notes
Nut secure PCS cable to 12V passthrough output
9 Nm (6.6 lbs-ft)
  • Electrical Protective Gloves
  • Cordless Ratchet/Impact Driver
  • 12 mm deep socket
 Replace
Bolts (X3) securing ancillary bay cover to HVC
5 Nm (3.7 lbs-ft) + 30 degrees
  • DRIVER KIT, 1/4" HEX, M12
  • External Torx E10
 Reuse
Bolts (X18) securing ancillary bay cover to HV battery
8 Nm (5.9 lbs-ft)
  • External Torx E10
  • PENTHOUSE SOCKET, 1/4" DR, 5-LOBE, E-TORX MAG
 Reuse The fasteners are captive and will stay attached to the ancillary bay cove

Remove

Warning IconA warning icon, calling your attention to a possibly risky situation
CAUTION
When servicing the ancillary bay cover and components in or around the ancillary bay, there is a possibility of encountering metal flashing on the inner edge of the vehicle single-piece rear casting. These sharp protrusions are a cut hazard, and proper PPE should be worn if there is a chance of contacting the flashing unprotected. If not already wearing leather over gloves, then at least wear cut-resistant gloves when the flashing is present.
  1. Open all the doors and lower all the windows.
  2. Remove the HEPA filter assembly. See HEPA Filter Assembly (Remove and Replace).
  3. Disconnect the LV power. See LV Power (Disconnect and Connect) (Modify).
  4. Remove the 2nd row lower seat cushion. See Seat Cushion - 2nd Row (Remove and Replace).
  5. Verify operation of multimeter.
    Informational PurposesAn informational icon, calling your attention
    Note
    Set multimeter to DC voltage, Confirm multimeter is properly measuring voltage by testing LV battery, Touch lightly and do not damage terminals.
  6. Perform Vehicle HV Disablement Procedure. See Vehicle HV Disablement Procedure.
    Informational PurposesAn informational icon, calling your attention
    Note
    The probe lid does not need to be reinstalled, as the new ancillary bay cover comes with a probe lid.
  7. Remove HV insulating gloves.
    Warning IconA warning icon, calling your attention to a possibly risky situation
    CAUTION
    If flashing is present on the vehicle single-piece rear casting, put on cut-resistant gloves.
  8. Remove the 2nd row seat assembly. See Seat Assembly - 2nd Row - RH (5-Seat) (Remove and Install).
  9. Remove the 2nd row seat assembly. See Seat Assembly - 2nd Row - LH (5-Seat) (Remove and Install).
  10. Disconnect the HVC logic connector and install the logic cap.
    Informational PurposesAn informational icon, calling your attention
    Note
    Release the locking tab then pivot the handle downward to release the connector.
  11. Remove the PCS cable from the 12V pass through output.
    Informational PurposesAn informational icon, calling your attention
    TIp
    Use of the following tool(s) is recommended:
    • Electrical Protective Gloves
    • Cordless Ratchet/Impact Driver
    • 12 mm deep socket
  12. Remove the bolts (x3) that attach the ancillary bay cover to the high voltage controller.
    Informational PurposesAn informational icon, calling your attention
    TIp
    Use of the following tool(s) is recommended:
    • DRIVER KIT, 1/4" HEX, M12
    • External Torx E10
  13. Remove the bolts (x18) that attach the ancillary bay cover to the HV battery.
    Informational PurposesAn informational icon, calling your attention
    TIp
    Use of the following tool(s) is recommended:
    • External Torx E10
    • PENTHOUSE SOCKET, 1/4" DR, 5-LOBE, E-TORX MAG
  14. Put on HV insulating gloves, leather outer gloves, and safety glasses before continuing this procedure.
  15. Remove the HVC logic cap.
  16. Remove the ancillary bay cover from the vehicle.
    Warning IconA warning icon, calling your attention to a possibly risky situation
    Warning
    Remove the ancillary bay cover from the vehicle while standing outside the vehicle to reduce the risk of falling into the open HV battery.

Replace

  1. Use IPA wipes to clean the ancillary bay cover gasket surface, and the mating surface of the HV battery.
  2. Install the ancillary bay cover to the HV battery, and then hand tighten the bolts (x18).
    Warning IconA warning icon, calling your attention to a possibly risky situation
    Warning
    Install the ancillary bay cover to the HV battery while standing outside the vehicle to reduce the risk of falling into the open HV battery.
  3. Remove the HV insulating gloves.
  4. Install the HVC logic cap.
  5. Torque the ancillary bay cover bolts (x18) in the sequence shown, and mark each with an orange paint pen as they are torqued.
    8 Nm (5.9 lbs-ft)
    Warning IconA warning icon, calling your attention to a possibly risky situation
    CAUTION
    Use an External Torx E10 5-Lobe socket that is not magnetized. Sockets with magnets will not fully grip and can possibly strip the bolt head.
    Informational PurposesAn informational icon, calling your attention
    TIp
    Use of the following tool(s) is recommended:
    • External Torx E10
    • PENTHOUSE SOCKET, 1/4" DR, 5-LOBE, E-TORX MAG
  6. Install the bolts (x3) that attach the ancillary bay cover to the high voltage controller.
    5 Nm (3.7 lbs-ft) + 30 degrees
    Informational PurposesAn informational icon, calling your attention
    TIp
    Use of the following tool(s) is recommended:
    • DRIVER KIT, 1/4" HEX, M12
    • External Torx E10
  7. Install PCS cable to 12V pass through output.
    9 Nm (6.6 lbs-ft)
    Informational PurposesAn informational icon, calling your attention
    TIp
    Use of the following tool(s) is recommended:
    • Electrical Protective Gloves
    • Cordless Ratchet/Impact Driver
    • 12 mm deep socket
  8. Install positive 12V output cover to PCS cable.
  9. Remove the logic cap and connect the HVC logic connector.
    Informational PurposesAn informational icon, calling your attention
    Note
    Align the connector, then pull the handle to the locking position, and to get the connector fully seated.
  10. Install the 2nd row seat assembly. See Seat Assembly - 2nd Row - LH (5-Seat) (Remove and Install).
  11. Install the 2nd row seat assembly. See Seat Assembly - 2nd Row - RH (5-Seat) (Remove and Install).
  12. Install the 2nd row lower seat cushion. See Seat Cushion - 2nd Row (Remove and Replace).
  13. Perform an ancillary bay air leak test. See Ancillary Bay Air Leak Test (Inspection).
  14. Connect the LV power. See LV Power (Disconnect and Connect) (Modify).
  15. Install the HEPA filter assembly. See HEPA Filter Assembly (Remove and Replace).
  16. Move the front seats to original positions.
  17. Remove vehicle from lift.
  18. Raise all four windows.
  19. Close all four doors.