Mini Cooper One R55 R56 R57 Air Conditioning Heater Radiator 3422666

The Mini Cooper One R55 R56 R57 Water Heater Heat Exchanger is an original heating system component designed for Mini models from the R55, R56, and R57 series. This specialized heat exchanger is responsible for efficiently transferring energy from the engine's cooling system to the cabin heating system, ensuring stable operating conditions and thermal comfort inside. Thanks to its construction compliant with manufacturer standards, it maintains the correct operating parameters of the heating system and facilitates vehicle servicing.

Specifications and technical data

• SKU: 3422666-1
• Mark: Mini (Genuine OE)
• Condition: Used
• OEM Part Number: 3422666
• Substitutable numbers: 64113422666, 3422666, EM, 11617535847, 7535847
• Category: Other Air Conditioning & Heating

Purpose and Function in the Mini Heating System

The water heater – heat exchanger in the Mini Cooper One R55, R56, and R57 operates within the coolant circuit, absorbing heat from the engine and transferring it to the air directed into the cabin. A correctly selected component:

• ensures stable interior heating under various engine loads,
• reduces the risk of overheating by properly dissipating thermal energy,
• maintains uniform temperature distribution within the cooling system.

For R55/R56/R57 models, using a dedicated heat exchanger is crucial for preserving the factory performance characteristics of the heating system and ensuring proper interaction with other components.

Construction and Fit for Mini Cooper One R55 R56 R57

The offered water heater has been designed as a component compatible with factory-installed solutions in Mini vehicles. This means:

• geometry tailored to the installation space in R55, R56, and R57 bodies,
• connections prepared for integration with original cooling system hoses,
• heat exchanger construction optimized for fluid and air flow.

This ensures a predictable installation process without the need for system modifications, and the entire assembly maintains parameters close to OEM solutions.

Condition, Verification, and Benefits of Using a Used Part

This item comes from the Other category, allowing for flexible use in various servicing scenarios – from standard replacement of a worn-out heater to repairs of heating systems in vehicle restoration projects. As a used part, it offers a cost-effective solution while maintaining an original-like construction.

Using an original Mini heat exchanger in a used version is a good choice when you prioritize:

• maintaining consistency with the factory design of the cooling and heating system,
• reducing repair costs while ensuring proper functionality,
• easier diagnostics and future servicing.

Why Choose This Heat Exchanger for Your Mini

Replacing the water heater in a Mini Cooper One R55 R56 R57 directly impacts user comfort and the operational safety of the powertrain. A correctly selected heat exchanger:

• stabilizes thermal conditions inside the vehicle,
• supports the proper functioning of the engine's cooling system,
• facilitates maintaining the vehicle in good operational condition.

For workshops and individual users, this means a more predictable repair process and a reduced risk of problems arising from the use of random aftermarket parts.

Other Parts and Technical Knowledge

If you are looking for other items from the Other category dedicated to the Mini brand, explore our offer, where you will find a wide selection of parts such as Other Mini Parts. This will help you more easily assemble the set of parts needed for comprehensive servicing of the heating and cooling system.

To compare the characteristics of sports powertrain and braking systems with solutions used in standard model versions, it is worth familiarizing yourself with the construction analysis in the article: Audi RS vs. Other Models – What Lies Under the Hood and Chassis?. This provides a good supplement to knowledge about the differences in the design of key automotive components.