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How to Replace the Washer Pump and Sprayer on a Smart 450

Model: Smart Smart 450 - Years 1998-2007
Part: Checks and maintenance

If when you activate the washer, the sprayer does not send enough water to clean the glass properly, and the spray does not reach halfway up the glass, there is a problem with the pump. The pump is located behind the washer fluid reservoir and is press-fitted, so just pull it out firmly, and it will come away without issues. Of course, it depends on the vehicle you are working on: if it’s a Smart, the space will be quite limited. If the plastic does not hold well, you may need to wrap it with heat-shrink tubing; if it doesn’t hold, changing the pump will have been pointless: it won’t spray properly anyway. When you change the pump, some fluid will spill from the reservoir: collect it and dispose of it at an authorised centre; do not simply pour it down the sink. You can find the pump on Amazon for £13.48, including delivery. Refit it by pushing it back into its housing. Now clean the sprayers with a brass wire, pushing them in deeply. Then blow into them to check if air comes out. Job done.

Updated on 15 August 2026 by ScegliAuto

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