2025-06-23

12V/LV Battery (Remove and Replace)

NOTE: Unless otherwise explicitly stated in the procedure, the above correction code and FRT 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. To provide feedback on FRT values, email ServiceManualFeedback@tesla.com. NOTE: See Personal Protection to make sure wearing proper PPE when performing the below procedure. See Ergonomic Precautions for safe and healthy working practices.

Correction Codes and FRTs
  • Model Y with Lead Acid Battery: Correction code17011202, 0.18
  • Model Y with Li-Ion Battery: Correction code17011232, 0.18
  • 2024-11-20: Added a note to remind of checking the 12V/LV battery temperature before performing the procedure.
  • 2024-10-30: Added a Note about replacing the LV battery with different types.
  • 2024-04-10: Added a Note to perform the recovery of the LV battery per Toolbox article prior to its replacement.
  • 2024-01-19: Updated instructions for different types of Li-Ion battery.
  • 2023-12-04: Updated configuration steps for different types of Li-Ion battery.
  • 2023-10-04: Updated configuration steps for lead acid battery to become a separate activity (correction code 91022407) to be added to the service visit.
  • 2023-09-07: Updated lead-acid procedure with guidance for changing lead-acid battery types.
  • 2023-09-06: Updated Li-Ion Battery procedures according to the latest procedure input.
Warning IconA warning icon, calling your attention to a possibly risky situation
Warning
Before performing the following procedure, make sure the 12V/LV battery temperature is not overheated.

Torque Specifications

Table 1. Torque Specifications: 12V/LV Battery (Remove and Replace)
Description Torque Value Recommended Tools Reuse/Replace Notes
(Lead acid) positive/negative cable to the battery terminal
6 Nm (4.4 lbs-ft)
  • 10 mm deep socket
  • ¼ in std ratchet
  • 4 in extension
Reuse
(Li-Ion) bolts that attach the LV battery to the bracket
6 Nm (4.4 lbs-ft)
  • 8 mm socket
  • ¼ in std ratchet
  • 4 in extension
Reuse Early production vehicles have M6 bolts with 10 mm bolt head. Torque those to 10 Nm

Remove Lead Acid Battery

Informational PurposesAn informational icon, calling your attention
Note
If replacing a Clarios (Varta) 12V battery with an AtlasBX 12V battery, or vice-versa, make sure the vehicle is running software version 2023.32 or newer. Update the vehicle software if necessary; see Software Update.
  1. Remove the rear underhood apron. See Underhood Apron - Rear (Remove and Replace).
  2. Disconnect 12V power. See 12V/LV Power (Disconnect and Connect).
  3. Disconnect the vent tube hose from the LH side of the battery.
  4. Remove the cover for the 12V positive terminal.
  5. Loosen the nut that attaches the positive lead to the battery, and then remove the lead from the battery.
    6 Nm (4.4 lbs-ft)
    Informational PurposesAn informational icon, calling your attention
    TIp
    Use of the following tool(s) is recommended:
    • 10 mm deep socket
    • ¼ in std ratchet
    • 4 in extension
  6. Remove the 12V battery strap. See Strap - 12V Battery (Remove and Replace).
  7. Remove the battery from the vehicle.
  8. Write the last 6 digits of the vehicle VIN clearly onto the removed battery so that it can be identified if later needed.

Remove Li-Ion Battery

Informational PurposesAn informational icon, calling your attention
Note
The Li-Ion LV battery may not need to be replaced. Attempt to recover the LV battery first before determining that the LV battery needs replacement. Refer to Toolbox article 6249900 for more information.
  1. Remove the HEPA filter. See Assembly - Filter - HEPA (Remove and Replace).
  2. Power off the vehicle from the center display.
  3. Disconnect the LV battery connector from the LV battery: release the green locking tab, press the black connector (if applicable, on 16V battery), pull the black connector lock outwards to release the connector, and then pull up to disconnect the connector.
  4. Disconnect the first responder loop.
  5. Wait 2 minutes for the electrical system to fully discharge.
  6. Remove the bolts (x3) that attach the LV battery to the vehicle.
    Informational PurposesAn informational icon, calling your attention
    Note
    Early production vehicles may be equipped with M6 bolts (torque 10 Nm), later production vehicles are equipped with M8 bolts (torque 6 Nm).
  7. Remove the LV battery from the vehicle.

Install Lead Acid Battery

Installation procedure is the reverse of removal, except for the following:

Warning IconA warning icon, calling your attention to a possibly risky situation
CAUTION
Before installing the new 12V battery, make sure that the new battery's Open Circuit Voltage (OCV) is above 12.6V. If the OCV is between 12.4V and 12.6V, recharge the new battery. Any battery below 12.4V must be discarded.
  • If replacing a Clarios (Varta) 12V battery with an AtlasBX 12V battery, or vice-versa, update the vehicle configuration.
    Informational PurposesAn informational icon, calling your attention
    Note
    The configuration update can only be performed on vehicles with vehicle software version 2023.32 and newer.
    Informational PurposesAn informational icon, calling your attention
    Note
    If a configuration update is required, separately add Correction Code 91022407 (Vehicle Configuration Update) to the Service Visit.
    1. Unlock the vehicle gateway. See Gateway (Unlock).
    2. In the Service Mode menu, go to Low Voltage > Power Distribution > Change Battery Type.
    3. Select the type of battery that was installed, and then touch Change Battery Type to Selected.
    4. Read the prompt, touch Run, and allow the routine to complete.

Install Li-Ion Battery

  1. Install the bolts (x3) that attach the LV battery to the vehicle.
    6 Nm (4.4 lbs-ft)
    Informational PurposesAn informational icon, calling your attention
    Note
    For HW4 vehicles, both the silver-cased NMC Li-Ion LV battery variant and the black-cased LFP Li-Ion LV Battery variant are compatible.
    Informational PurposesAn informational icon, calling your attention
    Note
    Early production vehicles may be equipped with M6 bolts (torque 10 Nm), later production vehicles are equipped with M8 bolts (torque 6 Nm).
  2. Connect the first responder loop.
  3. Connect the LV battery connector to the LV battery: insert the connector, then push the black connector lock inwards to engage the connector, and then seat the green locking tab after lock is fully secured.
    Informational PurposesAn informational icon, calling your attention
    Note
    If the vehicle does not power up after the LV battery is connected, power up the vehicle with an approved external power supply.
  4. Enter Service Mode. See Service Mode.
  5. Unlock vehicle gateway. See Gateway (Unlock).
  6. On the vehicle touchscreen, touch Low Voltage > Power Distribution > Battery Icon > Learn New Battery, and click Run to start the routine.
    Warning IconA warning icon, calling your attention to a possibly risky situation
    CAUTION
    Vehicle software must be FW 2023.44 or later version.
    Informational PurposesAn informational icon, calling your attention
    Note
    Once the routine is completed, the Mosfet and ECPA will be Closed.
  7. Only if the replacement battery is CATL_LI_ION: reinstall the vehicle software. See Software Reinstall - Touchscreen.
    Informational PurposesAn informational icon, calling your attention
    Note
    You can read the battery configuration via service UI > Low Voltage > Power Distribution > Li-Ion LV battery > Config.
  8. Install the HEPA filter. See Assembly - Filter - HEPA (Remove and Replace).