Washer Fluid Reservoir Install

If you want people to know you take care of your car then you show them by replacing all the old, yellowed fluid reservoirs with new minty white containers. For older bimmers these things are fast disappearing from the BMW warehouses so now if ever there was a time to buy an expensive plastic bottle with no functional improvement over the one you already have, this is that time.

The first step is to empty the old reservoir. If I lived somewhere where washer fluid was actually useful I’d probably wait until the reservoir was almost empty and then install the new one. But living in California I used a siphon and pail.

how to drain e36 washer fluid reservoir

Once the reservoir is empty removing the fluid level sensor and washer fluid pump requires no tools: both pieces just pull out with gentle pressure and a little wiggling. The rubber gaskets are pressure fit in place only so these also come out without tools. This is a good time to clean the gaskets with Vinylex or some other rubber treatment and also clean hoses, wires, sensor and pump and the area under the tank. The tank itself is held on with 1 plastic nut.

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e36 washer fluid reservoir plastic gaskets

Compare the old tank and the new one.

e36 m3 washer fluid reservoir part number 61-66-8-370-834-M9

Install is the reserve of removal. Be sure to install the fluid level sensor with the plastic float on the bottom or it will always incorrectly report that fluid is low.

e36 m3 engine bay

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November 17, 2013 cosmetic, e36 m3