VW Golf Mk7 Polo Mk5 Audi A1 8X Washer Reservoir Cap Filler Neck 3Q0955455

VW Golf Mk7 Polo Mk5 Audi A1 8X Washer Reservoir Cap Filler Neck is an original component from the Washer fluid reservoirs, pumps and nozzles group, designed to tightly seal the fluid filler neck in the washer system. It ensures safe operation of the system, protecting the fluid from contaminants and uncontrolled leaks, which translates into stable washer performance and better visibility while driving.

Specifications and technical data

• SKU: 3Q0955455-3
• Mark: Volkswagen
• Condition: Used
• OEM Part Number: 3Q0955455
• Substitutable numbers: 3Q0955455, 3Q0 955 455
• Part type: Reservoir
• Category: Washer Pumps, Reservoirs & Nozzles

Purpose and technical function

The presented cap is a component of the system responsible for operating the windshield washers in Volkswagen vehicles and selected Audi models. Its task is to maintain the appropriate level of tightness at the fluid reservoir filler neck, which limits evaporation, minimizes the risk of dirt entering the reservoir, and supports the proper operation of the washer pump and nozzles. A properly selected cap in this section of the vehicle contributes to:

• stable pressure in the washer system,
• protection against contaminants entering the reservoir,
• maintaining the correct operating parameters of pumps and nozzles,
• trouble-free fluid refilling thanks to the ergonomic shape of the handle.

Compatibility with Volkswagen and Audi models

The cap has been designed for use in popular models such as the Volkswagen Golf Mk7, Volkswagen Polo Mk5, and Audi A1 8X. This means maintaining factory dimensions, mounting geometry, and closing methods, which translates into a secure fit on the filler neck without the need for modifications. As a result, this element can be used both as a replacement for a damaged cap and as part of preventive maintenance in the washer system. Its original origin from the Volkswagen group promotes material consistency with other system components, which is important for long-term operation in variable temperature conditions and contact with various types of washer fluids.

Performance characteristics and advantages of use

As an element from the Washer fluid reservoirs, pumps and nozzles category, the cap plays an important auxiliary role in the entire system. Properly closing the filler neck limits the risk of fluid spilling in the engine compartment and also makes it easier to maintain cleanliness during service. The design of the cap is adapted for daily use – the handle allows for convenient opening and closing even when wearing work gloves. Key benefits of using this component include:

• factory fit for the filler neck in compatible models,
• stable hold in the socket, limiting accidental opening,
• resistance to operating fluids used in washer systems,
• consistent appearance with other engine compartment elements in Volkswagen group vehicles.

Component condition and service application

The offered cap comes from original vehicle equipment and is intended for reinstallation as part of service or repair work. This type of component is particularly useful when the existing cap has suffered mechanical damage, seal wear, or has been lost during vehicle maintenance. Replacing the cap is a simple service task that can significantly improve the comfort of using the washer system and reduce the risk of unwanted leaks.

Washer system expansion and parts selection

If you are planning a comprehensive repair or upgrade of the washer system area in your Volkswagen and need other elements from the same group, such as reservoirs, pumps, or nozzles, check the available parts in the Volkswagen washer fluid reservoirs, pumps and nozzles category. When selecting consumables for vehicles, it is worth paying attention to compliance with manufacturer markings and system parameters. Helpful tips on identifying components by manufacturer markings, as well as practical information on diagnostics and operation of supply systems, can be found in the article: Fuel system – injectors, pumps and fuel tank: maintenance and regeneration.