Windscreen Washer Tank BMW G11 G12 G30 G31 Bottle Fluid Reservoir 8491829

Windscreen Washer Tank BMW G11 G12 G30 G31 Bottle Fluid Reservoir is an original windshield cleaning system component designed for luxury BMW 7 Series and 5 Series models. Thanks to its factory design, it ensures proper power supply to the washer system and stable mounting of pumps and hoses, which translates into safe and comfortable vehicle operation. It is a practical solution for users who want to restore full functionality to the washer system after damage or wear of the existing tank.

Specifications and technical data

• SKU: 8491829-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8491829
• Substitutable numbers: 8491829, 61668491829, 7377041, 61667377041
• Category: Washer Pumps, Reservoirs & Nozzles

Purpose and function in the BMW washer system

The presented tank is a component of the system responsible for storing washer fluid in BMW G11, G12, G30, and G31 series models. Its task is to ensure a stable flow of fluid to the pumps and nozzles so that the system can effectively clean the windshield and, depending on the vehicle configuration, other glass surfaces as well. The tank design is matched to the factory mounting points in the body, which allows for maintaining proper hose routing and the correct operation of the entire system.

Construction and fitment for G11, G12, G30, G31 bodies

The tank has been designed specifically for the body architecture of the 7 Series (G11/G12) and 5 Series (G30/G31), taking into account the limited space in the wheel arch and engine compartment. The appropriately shaped housing allows for:

• secure seating in factory brackets,
• proper positioning of connection ports relative to pumps and hoses,
• maintaining the clearances necessary for suspension components and wheel arch liners.

As a result, installation is orderly, and once installed, the tank does not interfere with other components in the compartment.

Benefits of using an original BMW tank

Using an original washer fluid tank in BMW G11, G12, G30, and G31 models allows for maintaining factory system performance parameters. Key advantages include:

• precise fit for the specific body generation,
• stable mounting of pumps and fluid level sensors (if present in the car's configuration),
• correct routing of washer hoses, reducing the risk of kinks and leaks,
• maintaining the operating capacity of the system as intended by the manufacturer.

For the user, this means predictable washer performance in various weather conditions and a lower risk of failure resulting from an improperly fitted replacement part.

Component condition and service application

The offered tank comes from the Washer fluid tanks, pumps, and nozzles group and is intended for service applications in BMW vehicles where mechanical damage, housing cracks, or system leaks have occurred. It is suitable for both standard replacement after a collision and for comprehensive body renovation work where it is necessary to restore the full functionality of the washer system.

Integration with other washer system components

The tank works with the pumps, hoses, and washer nozzles intended for the G11, G12, G30, and G31 platforms. A correctly selected component facilitates:

• maintaining the tightness of hydraulic connections,
• maintaining appropriate operating pressure in the hoses,
• trouble-free system bleeding after installation.

In practice, this translates into even distribution of fluid over the windshield surface and stable washer operation over a long period of use.

If you are planning a comprehensive repair or upgrade of the area responsible for windshield cleaning in your BMW and need other components from the same group, such as additional tanks, pumps, or 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 importance of correct component selection by OEM numbers, it is worth referring to the guide material Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration, which discusses practical principles of diagnostics and parts selection according to manufacturer markings.

If you are working on refreshing an older BMW from the premium segment and want to effectively use used body and operational components, the article The second life of a youngtimer – how used car parts rejuvenate cars from the 1998–2012 model years, which describes modernization scenarios using original dismantled parts, may also be helpful.