LS - 1st and 2nd Gen (1990-2000) Discussion topics related to the 1990 - 2000 Lexus LS400

Low washer fluid message

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Old 06-09-19, 11:38 AM
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Fit1too
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Default Low washer fluid message

The low washer fluid message appeared not long after I purchased my 98 model. I tapped on the top of the bottle as suggested in the forum and the message disappeared. Over the winter the message returned, and the tapping did not solve the problem. I decided to disconnect the sensor until warm weather returned. I attempted to repair the original sensor, but it had a split along the rod that the float operates along, so I purchased an OEM replacement unit and found time to install it over this past weekend. I just did not want to leave stuff unplugged on my car—before you know it, the whole car is unplugged! It is simple, but as always, I learned a thing or two and wanted to share the results.
  • First, raise driver’s front side (makes it easier to put a pan under the work area, etc.)
  • Remove the 4 bolts (red arrows) and 1 plastic push pin (blue arrow) holding the fender liner to the underside of the car
  • Pull fender liner down enough to access washer fluid bottle and sensor
  • Tuck something up behind and below the washer bottle to allow fluid to flow out, down, and into a catch pan once the sensor is removed (I put a piece of cardboard in a plastic protector sleeve and used that)
  • Position pan to catch washer fluid
  • Pull the sensor downward to release from washer fluid bottle (there is only a rubber seal/gasket holding it in place)
  • Allow fluid to drain completely
  • Install new sensor
I put a tiny bit of olive oil on the part of the rubber seal/gasket that goes into the washer fluid bottle to allow the whole assembly to fully engage. I tried it without using the oil and it would NOT snap into position.

The part# is – 85397-50090, eBay, $65, free shipping.

Note: The third picture shows that the original rubber seal/gasket remained in the washer bottle when I removed the old sensor. This happened because I was afraid it would leak and used clear RTV sealant on it when reinstalling after my initial failed repair attempt. I removed it separately. Also, the new sensor and seal/gasket have to be installed together as a unit which is the tricky part!

















Last edited by Fit1too; 06-09-19 at 11:55 AM.
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Old 06-10-19, 07:14 PM
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RA40
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Thanks!
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