Subaru RX Windshield Washer Pump Replacement Guide (1985-1989)
Everything you need to know before replacing the windshield washer pump on your 1985-1989 Subaru RX.
- Failure is common due to age; the main symptom is no sound from the pump when activated.
- Diagnose before replacing: check the fuse and listen for the motor to rule out simple clogs.
- Aftermarket pumps from brands like Trico are the reliable and cost-effective choice, as OEM parts are unavailable.
- Hatchback models have a separate pump and reservoir for the rear washer; ensure you buy the correct part.
Is Your Subaru RX Washer Pump Failing?
A non-working windshield washer is a common issue on a vintage car like the 1985-1989 Subaru RX. After decades of use, the small electric motor inside the pump simply wears out. Before you buy a new part, it's important to confirm the pump is the actual problem. The symptoms are usually easy to spot.
Pro Tip: Diagnose Before You Replace
Don't assume the pump is bad right away. A few simple checks can save you time and money.
- Check the Fuse: This is the first and easiest thing to check. Consult your owner's manual for the fuse box diagram.
- Listen for the Motor: Have a friend activate the washer switch while you listen near the washer fluid reservoir in the engine bay. If you hear a humming sound, the pump is getting power, and the problem is likely a clog. If you hear nothing, the pump motor has likely failed.
- Check for Clogs: If the motor hums, disconnect the hose right at the pump outlet. Activate the washer again. If fluid squirts out, the pump is working, and you have a clog in the lines or at the spray nozzles on the hood. You can often clear nozzles with a small pin.
Choosing the Right Aftermarket Pump
For a vehicle like the Subaru RX, finding a new original equipment (OEM) washer pump from Subaru is highly unlikely. These parts have been out of production for many years. The most reliable and practical choice is a new aftermarket part.
Brands like Trico offer direct-fit replacement washer pumps for this generation of Subaru. These pumps are designed to match the original's fit and function. This means they plug directly into the factory wiring and press into the reservoir's rubber grommet without any need for modifications, making installation quick and easy.
Front vs. Rear Pump
If your Subaru RX has a rear wiper, it uses two different washer pumps. The front pump is in the engine bay, while the rear pump is on its own small reservoir in the cargo area. Make sure you are ordering the correct pump for the location you are replacing.
Windshield Washer Pump Cost for 1985-1989 Subaru RX
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket (Trico) | $24 - $35 |
| New OEM | Unavailable |
| Used OEM | $15 - $30 (Not Recommended) |
| Shop Labor | $50 - $100 |
Frequently Asked Questions (FAQ)
Can I replace the washer pump myself?
Yes, this is a very beginner-friendly job. The pump is typically located at the bottom of the washer fluid reservoir in the engine bay. Access usually involves unbolting the reservoir, disconnecting the power and hose, and pulling the old pump out. The entire job can be done in under an hour with basic hand tools.
Is the front and rear washer pump the same part?
No. On models with a rear wiper, there are two separate systems. The front pump is in the engine bay, and the rear pump is located on its own reservoir in the cargo area. They are different parts, so ensure you order the correct one.
What tools do I need to replace the washer pump?
You will likely only need a basic socket set to unbolt the washer reservoir for better access, and possibly a pair of pliers for the hose clamp. No special tools are required.
My pump runs, but no fluid sprays. Is it broken?
Not necessarily. If you can hear the pump motor, the problem is most likely a clog in the system. Check for clogs in the hoses or the small nozzles on the hood. You can also check for leaks in the washer fluid hoses.
Technical Specifications
Locating the pump: The front pump is located on the washer fluid reservoir in the engine bay. The rear pump (if equipped) is on a separate reservoir in the cargo area.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
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