2026-03-19

Ancillary Bay Cover (Remove and Install)

Correction code 1630010281 0.78 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.

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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.
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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.
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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.
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Warning
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.

Torque Specifications

Table 1. Torque Specifications: Ancillary Bay Cover (Remove and Install)
Description Torque Value Recommended Tools Reuse/Replace Notes
Bolts (x3) that attach the ancillary bay cover to the high voltage controller
5 Nm (3.7 lbs-ft) + 30 Degrees
  • Torque wrench with angle measurement
  • External Torx E10 5-Lobe
 Reuse
Bolts (x18) that attach the ancillary bay cover to the HV controller
8 Nm (5.9 lbs-ft)
  • External Torx E10 5-Lobe
 Reuse
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.
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Note
Torque these fasteners in the sequence specified in the installation step.
Informational PurposesAn informational icon, calling your attention
Note
These bolts are attached to the ancillary bay cover.

Remove

  1. Perform the Vehicle HV Disablement Procedure. See Vehicle HV Disablement Procedure (Test/Adjust).
  2. Disconnect the electrical harness from the high voltage controller connector.
    Informational PurposesAn informational icon, calling your attention
    Note
    The HV battery positive contactor and negative contactor open with a clunk sound.
  3. Install the logic connector cap onto the high voltage controller connector to prevent mistaken reconnection and protect the connector.
  4. Remove the bolts (x3) that attach the ancillary bay cover to the high voltage controller.
    Warning IconA warning icon, calling your attention to a possibly risky situation
    Warning
    The video(s) included in this procedure are meant as an overview for supplemental purposes only. Follow all of the steps listed in the procedure to avoid damage to components and/or personal injury.
    Informational PurposesAn informational icon, calling your attention
    TIp
    Use of the following tool(s) is recommended:
    • Torque wrench with angle measurement
    • External Torx E10 5-Lobe
  5. 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 5-Lobe
  6. Put on HV insulating gloves and leather outer gloves before continuing this procedure.
  7. 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.

Install

  1. Use IPA wipes to clean the ancillary bay cover gasket surface, and the mating surface of the HV battery.
  2. If the aluminum tape retrofit patch is missing or damaged, remove the patch (if present), clean the area with an IPA wipe, apply another patch of aluminum tape, and wet out the patch with a silicone roller to set the adhesive.
    Informational PurposesAn informational icon, calling your attention
    TIp
    Use of the following tool(s) is recommended:
    • 3M 425 Aluminum Foil Tape - 0601363
    Figure 1. 5-Bolt to 4-Bolt Patch 50mm x 50mm
    Figure 2. 4-Bolt to 3-Bolt Patch 30mm x 30mm
  3. Inspect ancillary bay walls for damage.
    Informational PurposesAn informational icon, calling your attention
    Note
    Any dent or depression in the seal that causes it to not be flat will result in a leak, and cannot be reused. Any paint that comes off the ancillary bay wall, whether or not it sticks to the seal, will require enclosure leak test when reassembled.
  4. Inspect the ancillary bay cover seal to confirm it has no visual damage.
    Informational PurposesAn informational icon, calling your attention
    Note
    Image up close for clarity. Delaminated and torn seals cannot be reused.
  5. Install the ancillary bay cover to the HV battery.
    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.
  6. Install the logic connector cap to the high voltage controller connector.
  7. Install the bolts (x18) that attach the ancillary bay cover to the HV battery in the sequence as shown.
    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
    Note
    Follow the torque sequence in the image.
    Informational PurposesAn informational icon, calling your attention
    TIp
    Use of the following tool(s) is recommended:
    • External Torx E10 5-Lobe
  8. Remove the HV insulating gloves.
  9. 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:
    • Torque wrench with angle measurement
    • External Torx E10 5-Lobe
  10. Connect the electrical harness to the high voltage controller connector.
  11. Install the 2nd row lower seat cushion. See Seat Cushion - 2nd Row (Remove and Replace).
  12. Connect the LV power. See LV Power (Disconnect and Connect).