Volkswagen Golf Mk7 2.0 TFSI CHHA Water Hose Radiator Coolant Pipe 5Q0122157AK

Volkswagen Golf Mk7 2.0 TFSI CHHA Water Hose Radiator Coolant Pipe is a component from the Cooling system hoses and pipes group, designed for use in the cooling system of a petrol engine paired with an automatic transmission. It is responsible for the stable flow of coolant between the radiator and the engine, which translates into a safe operating temperature for the power unit and predictable vehicle behavior in all conditions.

Specifications and technical data

• SKU: 5Q0122157AK-1
• Mark: Volkswagen
• Condition: Used
• OEM Part Number: 5Q0122157AK
• Substitutable numbers: 5Q0122157AK, 5Q0 122 157 AK
• Fuel type: Petrol
• Gearbox type: Automatic
• Part type: Hose
• Category: Coolant Hoses

Purpose and function in the cooling system

The described hose is designed for use in the 2.0 TFSI CHHA petrol engine in a Volkswagen Golf Mk7 equipped with an automatic transmission. Its task is to maintain a tight, stable connection between the cooling system components so that the coolant can circulate freely and effectively dissipate heat from the engine. A correctly selected hose minimizes the risk of overheating, performance drops, and uncontrolled leaks.

Construction and technical properties

The radiator coolant pipe in this Golf model operates in an environment of high temperatures and variable pressures, which is why its construction is adapted to the specifics of a turbocharged petrol engine and the characteristics of an automatic transmission. The shape and connection diameters are optimized for the factory cooling system, allowing for secure seating on the connectors and compatibility with original clamps. This ensures appropriate hose rigidity while maintaining the flexibility necessary to compensate for powertrain vibrations.

The component belongs to the Cooling system hoses and pipes group, meaning it has been designed for resistance to long-term contact with coolant, temperature changes, and typical operational loads in modern TFSI units.

Benefits of using an original hose

Using a hose dedicated to a specific engine and transmission configuration ensures:

• proper coolant routing across the entire engine load range,
• stable maintenance of the power unit's operating temperature,
• reduced risk of leaks resulting from mismatched diameters or geometry,
• compatibility with the factory layout of components in the engine bay.

For the user, this means more predictable cooling system operation, reduced risk of failures related to overheating, and easier diagnostics of potential faults, as the factory configuration of components is maintained.

Characteristics of the used product

The offered hose comes from the secondary market, which allows for economical repair while maintaining the original component specification. In the case of cooling system hoses, it is essential to maintain compliance in shape, diameters, and mounting methods with the factory solution – a used component from a vehicle disassembly with the same powertrain configuration meets these design requirements. This type of solution is often chosen for post-accident repairs, replacing damaged hoses after a collision, or during comprehensive cooling system maintenance.

Technical support and additional information

When working on the cooling system, it is worth paying attention to the condition of other components – the radiator, water pump, thermostat, and other hoses. It is also good practice to check the quality of the coolant and bleed the system after installing the hose. To better understand the impact of an efficient coolant circuit on the durability of the power unit, it is worth reading our guide material: Engine cooling system – overheating, repair, and used radiators.

If you are planning a comprehensive repair or upgrade of the engine area in your Volkswagen and need other elements from the same group, such as additional hoses, pipes, or cooling system connections, check the available parts in the Volkswagen cooling system hoses and pipes category.