2007-2013 Acura MDX Headlight Washer Pump: Failure Symptoms and Replacement Guide

Is Your Acura MDX Headlight Washer Pump Failing?

The headlight washing system on the 2007-2013 Acura MDX is a useful feature for maintaining visibility. However, the pump that powers it can fail over time. This guide covers the symptoms, diagnostics, and replacement information you'll need to address a faulty headlight washer pump.

Symptoms of a Failing Headlight Washer Pump

When the headlight washer pump begins to fail, you'll notice one or more of the following signs:

• No Spray from Headlight Nozzles: When you activate the system (usually by using the windshield washer while the headlights are on), no fluid sprays onto the headlights.
• No Sound from the Pump: The pump makes a distinct humming or whirring noise when it's running. If you hear nothing when you try to use the washers, the pump motor may have failed or is not receiving power.
• Washer Fluid Leak: You may notice a puddle of blue or purple washer fluid on the ground under the front passenger side of the vehicle. This can be caused by a cracked pump housing or a deteriorated seal where the pump enters the washer fluid reservoir.
• Blown Fuse: If the pump motor seizes or has an electrical short, it can blow the corresponding fuse in the fuse box.

Diagnosing the Problem

Before condemning the pump, follow these simple diagnostic steps:

1. Check the Washer Fluid Level: The most common reason for no spray is an empty reservoir. Ensure it is adequately filled.
2. Check the Fuse: Consult your owner's manual to locate the fuse for the washer systems. If the fuse is blown, replace it and test the system again. If it blows immediately, there is likely a short circuit in the pump or wiring.
3. Listen for the Pump: Have an assistant activate the washers while you listen near the front passenger-side wheel well for the pump's humming sound. If you hear it running but no fluid comes out, the pump's impeller may be broken, or there could be a clog in the lines.
4. Check for Power: If you don't hear the pump, a more advanced step is to access the pump's electrical connector and use a multimeter to check for power and ground when the system is activated. Power at the connector with no pump activity confirms a failed pump.

Buying a Used 2007-2013 MDX Headlight Washer Pump

A used OEM (Original Equipment Manufacturer) pump is often a reliable and cost-effective alternative to a new part. Here’s what to look for:

• Why Choose Used OEM?: An original Acura part is designed for a perfect fit and is built to a higher quality standard than many low-cost aftermarket alternatives. Aftermarket pumps can sometimes have issues with fitment, electrical connections, or premature failure.
• Physical Inspection: Carefully inspect the used pump before buying. Look for any cracks in the plastic housing, especially around the inlet and outlet ports. Check the electrical connector pins for any signs of corrosion or damage. Ensure the rubber grommet that seals the pump to the reservoir is included and is pliable, not dry or cracked.
• Verify the Part Number: The most reliable way to ensure compatibility is to match the OEM part number. The primary part number for this generation of MDX is 76806-STX-A00.

Known Issues, TSBs, and Recalls

As of early 2026, there are no specific recalls or Technical Service Bulletins (TSBs) from Acura or the NHTSA that directly address the headlight washer pump for the 2007-2013 MDX. Most failures are due to normal wear and tear over time. Forum discussions among owners indicate that leaks from the pump body or its grommet are a common point of failure, often discovered after removing the front bumper for other service. In some cases, the pop-up nozzles can also fail to retract properly or the covers can fly off, but this is an issue with the nozzle assembly, not the pump itself.

Replacement Guide Overview

Replacing the headlight washer pump is a moderately difficult job, primarily because it requires removing the front bumper cover to access the washer fluid reservoir where the pump is located.

• Difficulty: 3 out of 5
• Estimated Time: 1.5 - 2.5 hours
• Tools Needed: Ratchet and sockets (10mm), Phillips screwdriver, trim removal tools, drain pan.

General Steps:

1. Safely jack up the front of the vehicle and support it with jack stands.
2. Remove the plastic push clips and screws holding the top, sides (in the wheel wells), and bottom of the front bumper cover.
3. Carefully unsnap the bumper cover from the fenders and pull it forward. Disconnect the fog light connectors and the headlight washer hose before setting the bumper aside.
4. The washer fluid reservoir and its two pumps (one for the windshield, one for the headlights) will now be visible on the passenger side. The headlight washer pump is the one with the hose leading toward the bumper nozzles.
5. Place a drain pan underneath and disconnect the electrical connector and outlet hose from the pump.
6. Pull the old pump straight up and out of the reservoir. Be prepared for the remaining washer fluid to drain out.
7. Inspect and clean the grommet, or replace it with a new one.
8. Press the new or used pump firmly into the grommet, reconnect the hose and electrical connector, and reassemble in reverse order.

Cost Comparison

Frequently Asked Questions (FAQ)