Is a fault here a safety issue?

Not directly, but a poorly sealed cap can lead to contamination or evaporation of the fluid, and spills on inclines.

Can I drive without this cap?

Not recommended — the fluid may spill or evaporate faster.

Our catalog has a wide range of this part type for all popular brands and models, including VAG (VW, Audi, Škoda), Opel, Toyota, and more.

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This cap closes the filler neck of a separate rear-window washer reservoir (on models with separate tanks).

Our catalog has a wide range of this part type for all popular brands and models, including VAG (VW, Audi, Škoda), Opel, Toyota, and more.

Screws or clips onto the washer reservoir’s filler neck.

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Send us your car's make and model and we'll find the right part

No, most modern cars use one shared reservoir for the front and rear washers — a separate tank is more common on older or larger vehicles.