BMW G20 G21 G22 G26 Windscreen Washer Tank Cleaning Container 9478352

BMW G20 G21 G22 G26 Windscreen Washer Tank Cleaning Container is an original washer system component designed for modern BMW 3 and 4 Series models. Thanks to its factory-spec design, it ensures proper fitment to the bodywork, stable mounting, and safe routing of washer fluid. This is a practical solution for users looking to restore the full functionality of their windshield cleaning system.

Specifications and technical data

• SKU: 9478352-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 9478352
• Substitutable numbers: 9478352, 61669478352, 7427885, 61667427885, 7124231
• Part type: Reservoir
• Category: Washer Pumps, Reservoirs & Nozzles

Purpose and function in the washer system

The presented tank is a component of the system responsible for storing washer fluid and supplying it steadily to the pump and nozzles. In BMW G20, G21, G22, and G26 series vehicles, a properly functioning tank is essential for:

• maintaining the correct fluid level under all driving conditions,
• ensuring a constant supply to the washer pump,
• reducing the risk of leaks and air entering the system,
• seamless integration with factory sensors and equipment. Thanks to a design consistent with factory solutions, the tank works with original mounts and hoses, which facilitates installation and subsequent operation.

Construction and fitment for the BMW G-Series

The tank belongs to the Windscreen washer tanks, pumps, and nozzles category, meaning it has been designed to operate in close proximity to components exposed to temperature changes, vibrations, and contact with automotive chemicals. The shape and placement of the ports are adapted to the wheel arch housing and mounting space in BMW G20, G21, G22, and G26 models, which allows for maintaining:

• factory geometry of fluid hose routing,
• the correct operating capacity of the system,
• stable mounting at the points provided by the manufacturer. Such fitment reduces the need for system modifications and allows for consistency with other washer system components.

Benefits of using an original BMW tank

Using an original tank to replace a damaged or leaking component allows you to restore proper washer operation without compromising functionality. Key advantages include:

• compatibility with factory equipment – washer pump, hoses, and nozzles,
• maintaining the operating capacity specified by the manufacturer,
• appropriate material resistance to winter and summer fluids,
• consistency with the factory mounting and cover system. For users who prioritize technical correctness in repairs, choosing a component from the same design group as the original factory-installed part is a safe and predictable solution in the long term.

Condition, verification, and practical application

The offered tank comes from the BMW segment and is a used component, which in practice means the possibility of an economical repair while maintaining the original design. Before installation, a standard check of tightness, mounting points, and equipment sockets is recommended to ensure the washer system operates stably across the full temperature range. This type of component is particularly useful for post-collision repairs, replacing a damaged tank, or restoring full system efficiency after long-term use.

Part selection by numbers and technical support

The item has a dedicated OEM part number and associated interchangeable numbers, which facilitates precise identification and selection for a specific body version and model year. In case of doubt, it is worth comparing the markings with the vehicle documentation or using the manufacturer's catalogs to confirm compatibility with the specific configuration of the BMW 3 or 4 Series G-generation. For those interested in a broader approach to diagnostics and component selection by OEM numbers, as well as the principles of vehicle system operation, a blog article dedicated to the operation and maintenance of the fuel system may be helpful – you will find practical tips on part identification, regeneration, and maintenance there: Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration. If you are planning a comprehensive repair or upgrade of the windshield cleaning zone in your BMW and need other elements from the same group, such as additional tanks, pumps, or washer nozzles, check the available parts in the BMW Windscreen washer tanks, pumps, and nozzles category.