Lexus LS400 Windshield Washer Pump: A Guide for 1990-2000 Models
Everything you need to know about diagnosing and replacing the windshield washer pump on your first or second-generation LS400.
- Diagnosing a bad washer pump is simple: listen for the pump's hum when activated.
- If your wipers work, a blown fuse is not the cause of a dead washer pump.
- Replacement is a DIY-friendly job that takes about an hour, requiring removal of the driver's side wheel and fender liner for access.
- An aftermarket Trico pump is a cost-effective alternative to the more expensive OEM part for this application.
Is Your LS400 Windshield Washer Pump Failing?
A failing windshield washer pump is a common issue on many vehicles as they age, and the 1990-2000 Lexus LS400 is no exception. The symptoms are usually straightforward, making it easy to diagnose. If you're experiencing problems with your washer system, this guide will help you figure out the cause and choose the right replacement part.
Common Failure Symptoms
Before you assume the pump is bad, it's important to check a few things first. Make sure your washer fluid reservoir is full. Sometimes the simplest solution is the right one. Also, check the washer nozzles on the hood for clogs from wax or debris. You can often clear these with a small pin or needle. 🎬 See how to clear clogged nozzles and restore spray pressure If those aren't the issue, you likely have a problem with the pump or the electrical system.
🎬 Watch: Troubleshooting guide for weak or non-spraying washer fluid- No Sound, No Fluid: If you activate the washer and hear nothing from the pump, the pump itself may have failed or isn't receiving power. The washer pump shares a fuse with the wiper motor, so if your wipers work, a blown fuse is not the problem.
- Pump Hums, But No Fluid Sprays: If you can hear the pump motor running but no fluid comes out, the pump's internal impeller might be broken, or there could be a clog or leak in the washer fluid lines.
- Weak or Uneven Spray: A pump that is starting to fail may lose its ability to create enough pressure, resulting in a weak spray that doesn't effectively clean the windshield.
Cost of Windshield Washer Pump for 1990-2000 Lexus LS400
| Part Type | Estimated Cost |
|---|---|
| New OEM | $64 - $83 |
| New Aftermarket (Trico) | $35.01 |
| Shop Labor | $100 - $150 |
Choosing a New Aftermarket Pump
For a vehicle like the LS400, the original equipment (OEM) pump made by Lexus (Toyota) is a high-quality part. However, it comes at a higher price. Aftermarket parts are a cost-effective alternative. Trico is a well-known brand in the wiper and washer system industry, founded in 1917. Their aftermarket pumps are designed to be direct-fit replacements, meaning they should install without any modifications. For a simple part like a washer pump, a reputable aftermarket brand like Trico offers a good balance of quality and value, especially considering the age of the vehicle.
Pro Tip: Check the Grommet
The washer pump pushes into a rubber grommet at the bottom of the washer fluid reservoir. Over time, this grommet can become hard and brittle, leading to leaks. It's a good idea to replace this grommet when you replace the pump to ensure a perfect seal. It is an inexpensive part that can prevent future headaches.
Frequently Asked Questions (FAQ)
Is replacing the washer pump a DIY job?
Yes, for most home mechanics, this is a straightforward job. Accessing the pump requires removing the front driver's side wheel and pulling back the plastic fender liner to get to the washer fluid reservoir. From there, the pump is easy to access. It is held in by a rubber grommet and has one electrical connector and one or two hose connections. The entire job can typically be done in under an hour.
🎬 Watch this step-by-step walkthrough of the pump replacement processAre there any recalls for the LS400 windshield washer pump?
No, there are no specific recalls or technical service bulletins (TSBs) issued by Lexus or the NHTSA for the windshield washer pump on the 1990-2000 Lexus LS400. Failures are typically due to age and normal wear.
Is the pump the same for all 1990-2000 LS400 models?
The primary OEM part number for most of this generation is 85330-50020, which replaced an earlier part number. Aftermarket pumps like the one from Trico are also listed as fitting the entire 1990-2000 model year range. However, it's always best to confirm fitment for your specific year before purchasing.
Can I just use water in my washer reservoir?
It is not recommended. Windshield washer fluid contains cleaning agents to break down grime and also has antifreeze properties to prevent the fluid, pump, and lines from freezing and cracking in cold weather. Using only water can lead to damage, especially in winter.
Helpful Videos
Technical Specifications
OEM Part Numbers: 85330-50020 85310-14080
The windshield washer pump for the 1990-2000 Lexus LS400 is a 12V electric pump that press-fits into the washer fluid reservoir. It typically has a single outlet port for the front windshield washers. The LS400 did not have a factory rear wiper.
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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.
- Lexus LS400: