Replacement of the EV coolant pump on a 2024 Tesla Model 3 Long Range AWD. 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 the system. Coolant inspection is recommended at 4 years / 50,000 mi per Tesla's current guidance.

Warnings

Tools required

Parts

• EV coolant pump assembly (manufacturer-specified for 2024 Model 3 LR AWD) × 1 — Tesla OEM coolant pump — verify by VIN
• Coolant pump O-ring / seal kit (if supplied separately) × 1 — OEM seal kit for coolant pump
• Replacement spring-band hose clamps (as needed) × 2 — OEM-equivalent constant-tension clamps

Fluids

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

Preparation

1. Park on level ground, place in P, engage parking brake.
2. Exit ALL doors with the key fob 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 12V low-voltage battery. On 2024 Model 3, this is typically located behind the right rear seat back panel; some 2024+ builds use a lithium 12V under the floor — verify location before disconnecting.
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 run the coolant service routine to depressurize and isolate the battery cooling circuit. Do not proceed until Toolbox confirms the loop is safe to open.
7. Allow coolant to cool to ambient — Model 3 thermal loops can run above 60°C even after key-off.
8. Raise vehicle on a lift using Tesla-approved lift pad locations (do not lift on the battery pack).
9. Remove the front underbody/aero shield to access the front coolant components.
10. Stage a coolant catch pan under the pump area before opening any line.

Procedure

1. 1

   Verify loop depressurization via Toolbox
   With Toolbox connected, confirm the battery cooling loop has been commanded to a serviceable state and that pack pressure has bled down. Do not skip this — pressure remaining in the loop will spray coolant onto HV components when a fitting is opened.
   ⚠️Opening a pressurized line on Tesla's integrated thermal loop can spray coolant directly onto HV battery and inverter components. This can damage a $15,000+ HV battery and create a shock/short hazard.
2. 2

   Locate the EV coolant pump
   Identify the manufacturer-specified EV coolant pump in the front compartment along the thermal manifold assembly. Photograph the surrounding hose routing and harness routing before disturbing anything — Model 3 thermal plumbing is tightly packaged and easy to misroute on reassembly.
3. 3

   Disconnect pump electrical connector
   Release the locking tab on the low-voltage connector at the pump and set the harness aside. If the connector is secured by a retention bolt, remove it.
   ⚠Confirm the connector is low-voltage (black/grey). If the connector or any nearby cable is orange, STOP — this is HV and outside this procedure.
   Torque spec

   Connector Bolts7 Nm (5 lb-ft)
4. 4

   Position catch pan and prepare hoses
   Place the catch pan directly beneath the pump inlet/outlet. Have plugs/caps ready for both hose ends and both pump ports to minimize air ingress and coolant loss into the larger loop.
   ⚠️Any coolant that escapes into the HV battery enclosure or onto orange-shielded components can cause battery damage and shock risk. Contain spills immediately.
5. 5

   Release hose clamps and disconnect coolant lines
   Using hose clamp pliers, slide the constant-tension clamps back from the pump barbs. Carefully twist and remove each hose. Cap the open hose ends and the pump ports immediately. Inspect clamps for fatigue and replace if deformed.
   ⚠️This step opens the integrated thermal loop. Improper handling can introduce air into the HV battery cold plate or allow coolant to contact HV components — risking battery damage ($15,000+) and shock.
   Torque spec

   Hose Clamps3 Nm (2 lb-ft)

   Coolant Line Fittings15 Nm (11 lb-ft)
6. 6

   Remove pump mounting hardware
   Remove the bolts/nuts securing the pump to its bracket or to the thermal manifold. Support the pump as the last fastener is removed. Note the orientation of any isolation grommets — they must be reused or replaced in the same position.
   Torque spec

   Mounting Bolts27 Nm (20 lb-ft)

   Bracket Bolts20 Nm (15 lb-ft)
7. 7

   Remove pump from vehicle
   Withdraw the failed pump. Drain residual coolant from it into the catch pan. Compare the new pump's port orientation, electrical connector keying, and mounting pattern to the old unit before installing.
   ℹ️If the new pump differs in port orientation, verify by VIN that the correct part was supplied before continuing.
8. 8

   Install new coolant pump
   Fit any new O-rings or seals supplied with the pump (lightly lubricated with clean Tesla coolant — never petroleum grease). Position the pump on its bracket/manifold and start all fasteners by hand to avoid cross-threading.
   ⚠Do not use silicone grease or petroleum jelly on coolant seals — both can degrade G-48 chemistry and damage downstream HV battery components.
   Torque spec

   Mounting Bolts27 Nm (20 lb-ft)

   Bracket Bolts20 Nm (15 lb-ft)
9. 9

   Torque pump fasteners
   Torque the pump mounting bolts to 27.0 Nm (20.0 lb-ft) and any bracket bolts to 20.0 Nm (15.0 lb-ft). For any fastener not on the verified list, torque to OEM specification — refer to Tesla Service Manual.
   Torque spec

   Mounting Bolts27 Nm (20 lb-ft)

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

    Reconnect coolant hoses
    Reinstall hoses fully seated onto the pump barbs. Slide spring clamps into their original positions on the barb (not on the bead). Replace any clamp that does not snap back firmly.
    ⚠️An improperly seated hose can leak coolant onto HV battery or inverter housings — risk of battery damage ($15,000+) and HV shorting.
    Torque spec

    Hose Clamps3 Nm (2 lb-ft)

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

    Reconnect electrical connector
    Reseat the low-voltage connector until the lock clicks. If a retention bolt is used, torque to 7.0 Nm (5.0 lb-ft).
    Torque spec

    Connector Bolts7 Nm (5 lb-ft)

Reassembly

1. Reinstall the front underbody/aero shield. Torque any cover screws to 11.0 Nm (8.0 lb-ft).
2. Lower the vehicle.
3. Reconnect the 12V low-voltage battery.
4. Using the Tesla-approved fill tool, vacuum-fill the cooling system with Tesla Battery/Motor Coolant (G-48) — capacity reference 10.0 qt for the full system; actual top-up volume depends on how much was lost.
5. With Toolbox connected, run the coolant fill/bleed routine to cycle the pump(s), purge air from the battery cold plate, and verify no DTCs.
6. Inspect all disturbed joints for weeping after the bleed cycle.
7. Clear any service codes set during the procedure.

Verification

• Toolbox shows no active coolant-system or thermal-system DTCs after a full key cycle.
• Pump runs audibly during Toolbox-commanded test and during normal preconditioning.
• Coolant reservoir level remains stable between MIN/MAX after a 10–15 minute drive cycle and a heat-soak rest.
• No coolant residue at pump joints, hose clamps, or under the front underbody after road test.
• Battery and powertrain temperatures stabilize normally during a Supercharge or sustained highway drive (per Toolbox live data).
• Log the service: Tesla now recommends battery coolant inspection at 4 years / 50,000 mi — note date and mileage in the vehicle's service record.

More procedures for this vehicle