Replacement of the EV coolant pump on a 2024 Model Y Long Range AWD. This is a PROFESSIONAL-ONLY procedure — the pump is plumbed into Tesla's integrated battery/motor/cabin thermal loop, and Tesla Toolbox software is required to safely depressurize and refill the system. This is also a good opportunity to inspect coolant condition (Tesla recommends a 4 year / 50,000 mi inspection).

Warnings

Tools required

Parts

• EV coolant pump assembly (manufacturer-specified for 2024 Model Y) × 1 — Refer to Tesla EPC for current part number
• Coolant hose clamps (replace if spring-clamp style is fatigued) × 2 — OEM-equivalent
• O-rings / pump seals (if supplied separately from pump) × 1 — OEM-equivalent

Fluids

• Tesla Battery/Motor Coolant (G-48 specification) — 10 qt

Preparation

1. Park on level ground, place in P, engage the parking brake.
2. Exit ALL doors with the key fob (and any paired phone keys) at least 10 feet away from the vehicle. Wait at least 2 minutes for HV systems to fully de-energize.
3. Disconnect the 12V low-voltage battery. On 2024 Model Y the 12V (Li-ion) battery is located under the rear cargo area / behind the rear seat — refer to Tesla service documentation for the exact access panel on this build.
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. Connect Tesla Toolbox and place the vehicle into the appropriate service mode for the cooling system. Use Toolbox to depressurize / drain the relevant coolant loop section per the on-screen procedure. Do NOT open any line until Toolbox confirms the loop is depressurized.
7. Allow coolant to cool to ambient temperature before opening any fitting.
8. Raise and support the vehicle using Tesla-approved lift points and puck adapters. Verify stability before going underneath.
9. Position a coolant catch pan under the work area and have absorbent pads ready.

Procedure

1. 1

   Confirm loop depressurization with Toolbox
   With Tesla Toolbox connected, run the cooling system service routine and confirm on-screen that the loop containing the EV coolant pump is depressurized and isolated. Do not proceed if Toolbox reports any fault or residual pressure.
   ⚠️Skipping this step can spray hot, conductive coolant onto HV components. Battery damage from coolant intrusion can exceed $15,000 and may render the pack unsafe.
2. 2

   Remove access panels / underbody covers
   Remove the underbody aero panel(s) and any wheel-well liner sections required to access the EV coolant pump. Use plastic trim tools where clips are present to avoid cracking the aero tray. Retain all fasteners in order — the panels mix plastic push-pins and threaded fasteners.
   Torque spec

   Cover Screws11 Nm (8 lb-ft)
3. 3

   Locate and document the pump
   Identify the EV coolant pump in the affected loop. Photograph hose routing, clamp orientation, and electrical connector position before disturbing anything — Tesla routes multiple similar coolant lines in close proximity, and reversed hoses will cause air pockets and pump cavitation.
4. 4

   Disconnect the pump electrical connector
   Release the locking tab on the low-voltage connector at the pump and unplug it. Inspect the connector and pins for coolant residue or corrosion — any green/blue residue indicates a prior leak that must be addressed. If a connector retention bolt is used, loosen and retain it.
   Torque spec

   Connector Bolts7 Nm (5 lb-ft)
5. 5

   Capture residual coolant
   Position the catch pan directly under the pump. Even after Toolbox depressurization, residual coolant remains in the hoses and pump body and will spill when fittings are opened.
   ⚠️Coolant on HV components or connectors can cause shorts to the HV battery. Wipe up any drips immediately and inspect surrounding components before energizing.
6. 6

   Disconnect coolant hoses from pump
   Using hose-clamp pliers, slide the spring clamps back from each pump port and carefully twist the hoses free. If quick-connect fittings are used instead, depress the retaining tabs squarely and pull straight off — do not pry. Cap or plug the open hoses to prevent further drainage and contamination.
   ⚠️This step breaks the integrated thermal loop. Improper handling can introduce air or contaminants into the HV battery cooling circuit, which can damage the pack (>$15,000). Cap all open lines immediately.
   Torque spec

   Hose Clamps3 Nm (2 lb-ft)

   Coolant Line Fittings15 Nm (11 lb-ft)
7. 7

   Remove pump from bracket
   Remove the pump-to-bracket fasteners (or release the rubber isolator mounts, depending on the build) and lift the pump out. Note the orientation of any isolation bushings — they must be reinstalled in the same orientation to control NVH.
   Torque spec

   Mounting Bolts27 Nm (20 lb-ft)

   Bracket Bolts20 Nm (15 lb-ft)
8. 8

   Inspect bracket, hoses, and seals
   Inspect the mounting bracket for cracks, the hoses for swelling or hardening, and any pump seals/O-rings supplied with the new unit. Replace hoses or clamps that show fatigue. Compare old and new pumps side-by-side to confirm correct part number and port orientation before installation.
9. 9

   Install new EV coolant pump
   Position the new pump in the bracket with isolators correctly seated. Hand-thread fasteners first to avoid cross-threading aluminum, then torque to specification.
   Torque spec

   Mounting Bolts27 Nm (20 lb-ft)

   Bracket Bolts20 Nm (15 lb-ft)
10. 10

    Reconnect coolant hoses
    Reinstall each hose to its originally photographed port. Seat the hose fully onto the barb, then reposition the spring clamp into its original groove. For threaded fittings, torque to the coolant line fitting spec. For quick-connects, push straight on until the locking tab audibly clicks, then tug-test.
    ⚠️A reversed or improperly seated hose can cause cavitation, overheating, or coolant leakage onto HV components. Verify routing against your pre-disassembly photos before refilling.
    Torque spec

    Hose Clamps3 Nm (2 lb-ft)

    Coolant Line Fittings15 Nm (11 lb-ft)
11. 11

    Reconnect electrical connector
    Plug the LV connector into the pump until the lock clicks. If a retention bolt is used, torque to the connector bolt spec. Verify the harness is routed clear of hot or moving components.
    Torque spec

    Connector Bolts7 Nm (5 lb-ft)
12. 12

    Vacuum-fill and bleed the cooling loop
    Using a vacuum-fill tool and Tesla Battery/Motor Coolant (G-48 specification), pull the loop down to the manufacturer-specified vacuum level and verify it holds (leak check). Then draw in fresh coolant. Use Tesla Toolbox to run the appropriate pump bleed/cycle routine — manual bleeding will leave air pockets that can damage the HV battery cooling capability.
    ⚠️Air left in the battery cooling loop can cause localized hot spots in the HV pack and accelerated degradation or thermal events. Toolbox-driven bleed is mandatory.

Reassembly

1. Reinstall any underbody aero panels and wheel-well liners removed for access. Torque cover/panel screws to specification and re-seat all push-pin clips fully.
2. Lower the vehicle to the ground.
3. Reconnect the 12V low-voltage battery and reinstall its access panel.
4. Clear any DTCs in Tesla Toolbox and exit service mode.

Verification

• With Toolbox connected, command the EV coolant pump on and confirm reported flow/RPM is within Tesla's specification with no cavitation noise.
• Run the full cooling-system bleed routine a second time and recheck the coolant reservoir level; top off as needed with G-48 spec coolant.
• Inspect every disturbed fitting for leaks after the pump has run for several minutes and again after the system reaches operating temperature.
• Take the vehicle on a short road test, then re-scan for any thermal-system DTCs.
• Record the coolant service date/mileage — Tesla recommends battery coolant inspection at 4 years / 50,000 miles, so this resets that interval.
• Confirm no coolant residue on or near any orange HV cabling or HV component housings before returning the vehicle to the customer.

More procedures for this vehicle