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.
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.
Compare the old tank and the new one.
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.
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