Replacement of the EV coolant pump on a 2024 Tesla Model 3 Performance Dual Motor. This is a PROFESSIONAL-ONLY procedure: the pump is part of Tesla's integrated battery/motor/cabin thermal loop and requires Tesla Toolbox software to safely depressurize and refill. Battery coolant is also on Tesla's 4-year / 50,000-mile inspection interval — note this for future service.

Warnings

Tools required

Parts

• EV Coolant Pump (manufacturer-specified replacement for 2024 Model 3 Performance) × 1 — Refer to Tesla EPC for current part number — do not substitute non-OEM
• O-rings / pump-to-housing seals (if supplied separately) × 1 — OEM seal kit matched to pump
• Hose clamps (replace any single-use constant-tension clamps disturbed) × 2 — OEM spring clamps

Fluids

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

Preparation

1. Park on level ground, place in P, and engage the parking brake.
2. Exit ALL doors with the key fob carried away from the vehicle. Wait at least 2 minutes for HV systems to fully de-energize, even on this non-HV job.
3. Disconnect the low-voltage 12V battery. On 2024 Model 3, verify whether the vehicle has the rear-seat AGM 12V or the under-floor lithium 12V (architecture varies in 2024 production) and follow the corresponding Tesla disconnect sequence.
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 in Service Mode. Use Toolbox to command the cooling loop into the appropriate service/depressurization state for pump replacement before opening any line.
7. Allow the coolant to cool to ambient temperature. The loop can be hot and pressurized even when the car appears off.
8. Raise the vehicle on a lift using Tesla-specified lift points (puck adapters required to avoid battery tray damage).
9. Remove the front aero underbody shield/belly pan to access the front cooling components.
10. Position a coolant catch pan beneath the work area and stage absorbent mats around the battery underbody seam.

Procedure

1. 1

   Confirm loop depressurized via Toolbox
   With Tesla Toolbox connected, verify the coolant loop pressure has been bled to atmospheric and the pumps are commanded OFF. Do not proceed until Toolbox confirms a safe state.
   ⚠️Opening a pressurized HV battery cooling line can spray hot, conductive coolant onto HV components, damaging the pack and creating a shock/fire hazard.
2. 2

   Locate and identify the EV coolant pump
   Identify the failed pump within the front coolant module assembly. The Model 3 thermal system includes multiple electric pumps shared between battery, drive unit, and cabin loops — confirm via Toolbox diagnostics which pump is being replaced before disturbing any line.
   ⚠Replacing the wrong pump still requires re-bleeding the entire shared loop. Verify pump identity from Toolbox fault data, not by visual guess.
3. 3

   Drain the affected coolant circuit
   Following Toolbox-guided drain procedure, open the lowest service drain on the affected loop and capture coolant in the catch pan. Do not crack any fitting that has not been depressurized.
   ⚠️Coolant contacting HV battery internals can cause catastrophic pack failure (~$15,000+). Contain all fluid; do not allow it to track along the battery seam.
   Torque spec

   Coolant Line Fittings15 Nm (11 lb-ft)
4. 4

   Disconnect the pump electrical connector
   Release the locking tab on the low-voltage connector at the pump and set the harness aside. Inspect the connector for coolant intrusion or corrosion.
   Torque spec

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

   Release pump inlet and outlet hoses
   Using hose clamp pliers, relieve the constant-tension clamps and slide them back along the hose. Carefully work each hose off the pump barbs with a twisting motion. Plug both hose ends immediately to prevent further drainage and contamination.
   ⚠️These hoses are part of the integrated HV battery thermal loop. Any coolant escaping near the battery enclosure can damage the HV pack and energize a path to chassis. Capture every drop.
   ⚠Do not pry hoses off with metal tools — damaged barbs will leak after reassembly.
   Torque spec

   Hose Clamps3 Nm (2 lb-ft)
6. 6

   Remove pump mounting hardware
   Support the pump by hand and remove its mounting fasteners from the bracket/cradle. Note fastener length and location for reinstallation.
   Torque spec

   Mounting Bolts27 Nm (20 lb-ft)
7. 7

   Remove the pump
   Withdraw the pump from its mount. Inspect the mounting isolators/grommets — replace if cracked or oil-soaked. Inspect removed hoses internally for debris that would indicate impeller failure; flush per Toolbox guidance if contamination is found.
   ⚠️Debris from a failed pump impeller circulating in the loop can lodge in the battery cold plate. If significant debris is present, the loop must be flushed before the new pump is installed.
8. 8

   Install replacement pump
   Seat the new pump into its mount with the correct orientation (flow arrow matching loop direction). Install mounting fasteners finger-tight, then torque to specification.
   Torque spec

   Mounting Bolts27 Nm (20 lb-ft)
9. 9

   Reconnect hoses with new clamps as needed
   Lubricate hose ends lightly with fresh coolant only (no petroleum lubricants). Push hoses fully onto barbs until they bottom out, then position clamps in their original location and torque if a torqued-clamp design is used.
   ⚠️Improperly seated hoses on a shared HV-battery cooling line can leak coolant onto the pack at pressure. Verify full engagement before refilling.
   Torque spec

   Hose Clamps3 Nm (2 lb-ft)
10. 10

    Reconnect electrical connector
    Reseat the LV connector until the locking tab clicks. If the connector uses a bolted retainer, torque to the connector spec.
    Torque spec

    Connector Bolts7 Nm (5 lb-ft)
11. 11

    Refill and vacuum-fill the loop
    Using the Tesla-approved vacuum/fill tool and Toolbox-guided procedure, evacuate the cooling system to verify integrity (vacuum decay test), then fill with Tesla Battery/Motor Coolant (G-48). Approximate system capacity is ~10 qt; actual fill is determined by Toolbox.
    ⚠️Air pockets in the battery loop can cause hot spots in the pack and trigger thermal limp mode or pack damage. Do not skip the vacuum-fill step or substitute a gravity fill.
    Torque spec

    Coolant Line Fittings15 Nm (11 lb-ft)
12. 12

    Run Toolbox bleed/prime routine
    Execute Tesla's commanded pump-prime / bleed routine through Toolbox. Cycle the loop through battery-cool, motor-cool, and cabin-heat configurations as directed and top off the reservoir as air is purged.

Reassembly

1. Reinstall the front aero underbody shield/belly pan; torque fasteners to OEM specification — refer to Tesla Service Manual.
2. Lower the vehicle to the ground.
3. Reconnect the 12V (or lithium 12V) low-voltage battery in the correct sequence per Tesla procedure.
4. Wake the vehicle, exit Service Mode in Toolbox, and clear any stored thermal-system DTCs.
5. Verify reservoir level is at the COLD MAX line after the system has fully cycled and cooled.

Verification

• Confirm zero coolant-system DTCs in Toolbox after a full drive cycle.
• Monitor pump RPM and loop pressure live in Toolbox; values must be within Tesla's published service limits.
• Run a battery preconditioning cycle (e.g., navigate to a Supercharger) and verify battery inlet/outlet coolant temperatures track normally without delta spikes — abnormal delta indicates trapped air or restricted flow.
• Inspect every disturbed joint for weeping after 24 hours and again after the first thermal cycle. Pay particular attention to any fittings near the HV battery enclosure seam.
• Record the service in the customer record and flag the next battery coolant inspection at 4 years / 50,000 miles from this service.
• Verify cabin heat and A/C operate normally — the heat pump shares this loop, and incorrect bleed will manifest as poor cabin heating before it shows as a battery fault.

More procedures for this vehicle