BMW G20 G21 G22 G26 Windscreen Cleaning Container Bootle Washer Tank 7427885

BMW G20 G21 G22 G26 Windscreen Cleaning Container Bootle Washer Tank is an original washer system component designed for installation in the rear part of the vehicle body. As a factory BMW component, it ensures a proper fit to the body structure and correct integration with the washer system. It is a practical solution for users who want to restore full functionality to the window cleaning system while maintaining the original vehicle specification.

Specifications and technical data

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

Purpose and function in the vehicle

The presented tank is a component of the system responsible for storing washer fluid for the rear window. Its location in the rear of the vehicle allows for shorter hoses, stable mounting, and reduced pressure loss in the system. As a result, the washer system operates predictably, and the fluid is delivered evenly, which improves visibility in difficult weather conditions.

This type of solution is particularly important in modern BMW 3 and 4 Series bodies, where the tailgate design and interior trim require a precisely fitted tank. Using an original component minimizes the risk of leaks, improper mounting, or interference with other equipment elements.

Design and fitment for BMW G20 / G21 / G22 / G26

The tank has been designed specifically for the geometry of the BMW G20, G21, G22, and G26 bodies, which translates into:

• proper mounting points for factory brackets in the rear part of the body,
• compatibility with the factory washer pump and hoses,
• maintenance of the correct operating capacity in the context of the stock system.

Such fitment facilitates installation and service, and also reduces the need for system modifications. The original origin of the component helps maintain the technical consistency of the vehicle and facilitates subsequent diagnostics of any washer system faults.

Condition, verification, and service application

The item comes from disassembly and is offered as a used part, which is a cost-effective solution while maintaining compliance with the factory BMW specification. This type of component is often chosen for:

• repairs after collisions in the rear part of the body,
• mechanical damage to the tank (cracks, leaks),
• restoring full functionality of the washer system after long-term use.

Selecting parts according to the OEM number or interchangeable numbers allows for precise matching to a specific vehicle configuration, which is particularly important in the case of equipment differences between body versions.

Benefits of using an original washer tank

Using an original tank in the BMW rear window washer system brings a number of practical benefits:

• secure fit to the body – no need for modifications to mounts or installation,
• stable operation of the washer system thanks to the maintenance of factory geometry and capacity,
• easier diagnostics and service in the future, thanks to compliance with manufacturer documentation,
• maintaining the technical consistency of the vehicle, which is important for long-term operation.

For workshops and individual users, this means faster installation, lower risk of operational problems, and predictable system behavior in various road conditions.

Related BMW washer system components

If you are planning a comprehensive repair or upgrade of the rear body area in your BMW and need other elements from the same group, such as hoses, pumps, or washer nozzles, check the available parts in the BMW washer fluid tanks, pumps, and nozzles category.

To better understand the relationships between individual vehicle systems, including the selection of components by OEM numbers and the principles of operating tanks and pumps, it is worth reading the article: Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration, which discusses a practical approach to working with systems based on tanks, pumps, and hoses.