BMW 7 Series E65 E66 Diesel Webasto Additional Heater 9111336

BMW 7 Series E65 E66 Diesel Webasto Additional Heater is a factory-fitted component of the heating system, which works with diesel engines and is integrated into the cooling system circuit. Thanks to its integration with the vehicle's liquid cooling installation, it ensures efficient heating of the power unit and the interior, which improves driving comfort in low temperatures and reduces engine strain during cold starts.

Specifications and technical data

• SKU: 9111336
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6986233
• Substitutable numbers: 64126986233, 6986233, 64126933260, 64126933979, 64128386069, 6933260, 6933979, 8386069
• Fuel type: Diesel
• Category: Coolant Hoses

Purpose and function in the cooling system

The offered item belongs to the Cooling system pipes and hoses group and is designed for BMW 7 Series E65 and E66 models with diesel engines. In a typical Webasto installation in these vehicles, the auxiliary heating components are integrated into the coolant circuit, which allows for rapid increase of the liquid temperature and subsequent efficient heat transfer to the interior heater core.

This type of solution reduces cold engine operation, stabilizes the thermal conditions of the power unit, and supports even heat distribution throughout the entire circuit. A correctly selected and leak-free component from this group is crucial for maintaining proper fluid flow and trouble-free operation of the entire auxiliary heating system.

Compatibility and vehicle integration

The presented component is part of the original BMW installation, which facilitates its integration with the factory Webasto in the E65/E66 series. The design intended for use with diesel units ensures compatibility with the operating parameters of the cooling system in Diesel engines, including their specific operating temperatures and heating characteristics.

The element works with other parts of the system – the coolant pump, heater core, valves, and Webasto controls – to create a coherent system. This makes it possible to maintain the factory logic of the auxiliary heating, including automatic engine preheating and comfortable preparation of the vehicle interior before starting the journey.

Performance characteristics and installation benefits

Choosing an original solution from the pipes and hoses group for the Webasto in a BMW E65/E66 allows for maintaining the correct geometry of coolant routing and proper fitment to the mounts and connectors in the engine bay. This translates into:

• stable coolant flow in the auxiliary heating circuit,
• reduced risk of leaks at connections,
• proper cooperation with other cooling system components,
• maintenance of factory Webasto operating parameters.

The product comes from the BMW segment, which in practice means maintaining the original geometry and purpose, and thus less interference with the existing installation during assembly.

Product condition and practical application

The offered item is from the used parts group, which is an attractive solution for users looking for factory components at a reasonable price, while maintaining compatibility with the original Webasto installation. This type of subassembly will work well both when replacing a damaged part of the system and when restoring full functionality of the auxiliary heating after previous modifications or repairs.

Due to the nature of its operation in the coolant circuit, it is recommended to perform a standard leak check and inspect the condition of the connection surfaces before installation, and to bleed the cooling system according to the service procedure for the specific BMW model after installation.

Technical support and additional materials

To better understand the impact of Webasto components on the temperature stability of the power unit and the durability of the entire system, it is worth reading our guide on the diagnostics and operation of the cooling system: Engine cooling system – overheating, repair, and used radiators. The article discusses practical aspects of cooling system operation in popular models and helps to assess the condition of individual components.

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other elements from the same group, such as coolant pipes, return hoses, or sections connecting to the heater core, check the available parts in the BMW cooling system pipes and hoses category.

Additional information on selecting used components for popular car models is also provided by our aftermarket guide: most frequently chosen original used car parts, which helps to consciously plan repairs and upgrades using dismantled parts.