Coolant Pump BMW F30 LCI Petrol B48X Turbo Cooling Auxiliary Pump 8642732

The BMW F30 LCI Gasoline B48X Auxiliary Coolant Pump is a component from the Water Pumps category, designed for the cooling system of post-facelift BMW 3 Series gasoline engines. It enables stable heat dissipation from the powertrain, supporting the main pump's operation and improving thermal conditions during intensive use. This ensures the cooling system maintains predictable operating parameters, contributing to the durability of the B48X engine.

Specifications and technical data

• SKU: 8642732
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8642732
• Substitutable numbers: 8642732, 11518642732
• Fuel type: Petrol
• Color: Black
• Category: Water Pumps

Purpose and Function in the Cooling System

The auxiliary coolant pump in the BMW F30 LCI with a B48X gasoline engine is responsible for forcing the circulation of coolant in selected auxiliary circuits. In practice, this means more even distribution of the coolant, especially under high thermal load, frequent starting and stopping, or city driving.

This component is essential wherever the following are required:

• maintaining stable operating temperature of the gasoline engine,
• relieving the main coolant pump,
• efficient cooling of components working with the powertrain,
• maintaining proper system operation during frequent heating and cooling cycles.

Construction, Design, and Performance Parameters

The presented auxiliary coolant pump is a factory solution dedicated to BMW vehicles powered by gasoline. Its construction is adapted for operation in systems with elevated temperature and pressure, taking into account the characteristics of the B48X unit. The black housing ensures a neutral, factory look and easy integration into the engine bay without altering the original hose layout.

As a component from the Water Pumps category, the pump has been designed for continuous operation in a coolant environment, with an emphasis on resistance to temperature changes and compatibility with the original BMW F30 LCI equipment.

Condition, Fitment, and Installation

The pump comes from the secondary market, allowing for an economical restoration of the cooling system's efficiency while maintaining the original manufacturer's specifications. Using an OEM part facilitates installation in place of the factory component, without the need for system modifications or additional adapters.

When selecting, it is recommended to verify compatibility by OEM part number or interchangeable numbers and to match it to the specific B48X engine version in the BMW F30 LCI. This approach minimizes the risk of incorrect installation and ensures proper cooperation with other cooling system components.

Benefits of Using an Original Auxiliary Coolant Pump

Using an original auxiliary coolant pump in the BMW F30 LCI with a gasoline engine offers a range of practical benefits:

• Consistency with Factory Design – maintaining the original coolant flow characteristics and system operating parameters.
• Improved Temperature Control – more stable thermal conditions for the B48X engine, especially during dynamic driving and high loads.
• Reduced Overheating Risk – supporting the main coolant pump in critical operating ranges.
• Easier Installation – direct fit for factory mounts and hoses in the BMW F30 LCI engine bay.

More BMW Water Pumps and Technical Knowledge

If you are planning comprehensive maintenance of your BMW's cooling system and are also interested in other components in this group, such as main coolant pumps or auxiliary circulation modules, check out the available parts in the BMW Water Pumps category.

When working with components related to the fuel system and engine thermal management, it is advisable to be familiar with diagnostic principles and component selection by OEM and VIN numbers – practical tips, tables, and answers to the most common questions can be found in the article Fuel System – Injectors, Pumps, and Fuel Tank: Maintenance and Repair.