This procedure covers the removal and replacement of the windshield washer pump on a 2025 Rivian EDV 500, including accessing the washer fluid reservoir and electrical connections.

Warnings

Tools required

Parts

• Windshield washer pump × 1 — Use OEM specification
• Washer pump seal/grommet × 1 — Use OEM specification

Fluids

• Windshield Washer Fluid — 3.5 qt

Preparation

1. Park vehicle on level surface and engage parking brake
2. Power down the vehicle completely and remove the key fob from the cabin
3. Open the front hood and locate the washer fluid reservoir (typically driver side front corner)
4. Place drain pan and shop towels beneath the work area to catch spilled washer fluid
5. Disconnect the 12V auxiliary battery negative terminal to isolate electrical system

Procedure

1. 1

   Access the washer fluid reservoir
   Remove any trim panels or covers obstructing access to the washer reservoir. On the EDV 500, this may include removing the driver side front wheel well liner or inner fender panel fasteners using trim removal tools. Identify the reservoir location and clear adequate working space.
2. 2

   Drain the washer fluid reservoir
   Use a fluid transfer pump or large syringe to remove as much washer fluid as possible from the reservoir into a clean container for reuse. Alternatively, disconnect the outlet hose at the reservoir to allow fluid to drain into the drain pan. The reservoir holds approximately 3.5 quarts.
3. 3

   Disconnect electrical connector
   Locate the electrical connector on the washer pump at the bottom of the reservoir. Press the locking tab and carefully pull the connector away from the pump. If testing the old pump, use a multimeter to verify 12V power supply at the connector when the washer control is activated.
4. 4

   Disconnect washer fluid hoses
   Identify the outlet hose(s) connected to the washer pump. These are typically push-fit connections. Squeeze the hose clamp or locking collar and pull the hose straight off the pump outlet. Note the routing of hoses for reinstallation. Some residual fluid will drain from the hoses.
5. 5

   Remove the washer pump from reservoir
   The pump is typically secured in the reservoir by a twist-lock mechanism or mounting tabs. Rotate the pump counterclockwise approximately 1/4 turn and pull downward to extract it from the reservoir grommet. If the pump is stuck, gently rock it side to side while pulling. Remove the rubber seal/grommet with the pump.
6. 6

   Inspect and clean the reservoir mounting area
   Examine the pump mounting hole in the reservoir for cracks, debris, or damage. Clean the sealing surface thoroughly with a clean rag. Inspect the interior of the reservoir through the pump opening for contamination or debris that could damage the new pump.
7. 7

   Prepare the new washer pump
   Remove the new pump from packaging and verify it matches the original pump configuration. Install the new seal/grommet onto the pump body, ensuring it is fully seated in its groove. Lubricate the grommet lightly with clean washer fluid to ease installation.
8. 8

   Install the new washer pump
   Insert the new pump into the reservoir mounting hole, aligning any orientation tabs or slots. Push the pump firmly into place and rotate clockwise approximately 1/4 turn to lock it into position. Verify the pump is secure and the grommet is properly sealed against the reservoir.
9. 9

   Reconnect washer fluid hoses
   Push the outlet hose(s) firmly onto the pump outlet nipple(s) until fully seated. Verify the hose clamp or locking collar engages properly. Tug gently on each hose to confirm secure attachment.
10. 10

    Reconnect electrical connector
    Align the electrical connector with the pump terminals and push firmly until the locking tab clicks into place. Verify the connection is secure by gently pulling on the connector.
11. 11

    Refill washer fluid reservoir
    Pour washer fluid back into the reservoir through the fill neck. Fill to the appropriate level marked on the reservoir (approximately 3.5 quarts total capacity). Use fresh fluid if the old fluid was contaminated.
12. 12

    Reconnect 12V battery and test operation
    Reconnect the 12V auxiliary battery negative terminal. Power on the vehicle and activate the washer system. Verify the pump operates smoothly without unusual noise and that fluid sprays properly onto the windshield. Check all connections for leaks while the pump is running.

Reassembly

1. Reinstall any trim panels, wheel well liners, or covers removed during access
2. Verify all fasteners are properly secured
3. Clean up any spilled washer fluid from the engine bay and surrounding areas
4. Top off washer fluid reservoir to maximum fill line if needed after testing

Verification

• Activate the windshield washer system and confirm strong, consistent spray pattern on windshield
• Listen for normal pump operation without grinding, squealing, or cavitation noises
• Inspect all hose connections and pump mounting area for fluid leaks
• Verify washer fluid level remains stable after multiple spray cycles
• Test both intermittent and continuous spray functions to ensure proper pump performance

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