Ford Focus Mk2 ST RS Air Con Compressor Pump 2.5 Petrol 3M5H-19D629-MK

Ford Focus Mk2 ST RS Air Con Compressor Pump 2.5 Petrol is an item from the Air conditioning compressors and clutches group, designed for the cabin cooling system in sporty versions of the Focus with a petrol engine. This used compressor is a functional solution for drivers who want to restore the efficiency of their air conditioning while maintaining the factory operating characteristics of the system.

Specifications and technical data

• SKU: 3M5H-19D629-MK
• Mark: Ford
• Condition: Used
• OEM Part Number: 3M5H-19D629-MK
• Substitutable numbers: 3M5H-19D629-MK, 3M5H19D629MK
• Fuel type: Petrol
• Category: A/C Compressors & Clutches

Purpose and compatibility

The presented air conditioning compressor has been designed for the 2.5 petrol powertrain in the Ford Focus Mk2 ST and RS models. This ensures compatibility with the specific requirements of a high-output powertrain, where the compressor must operate stably both during relaxed driving and under higher thermal loads.

By using a solution consistent with the factory design, the correct mounting geometry, proper hose routing, and correct cooperation with engine accessories are maintained. This is particularly important in cars with a sporty character, where precision of assembly and reliability of the air conditioning system affect user comfort.

Construction and role in the air conditioning system

The air conditioning compressor in this model is responsible for compressing the refrigerant and maintaining the appropriate pressure in the circuit, which translates into effective cooling of the vehicle's interior. The ST and RS versions generate higher thermal loads, which is why the compressor must ensure stable operation across a wide range of engine speeds.

The item belongs to the Air conditioning compressors and clutches group, which means it works with the accessories driving the air conditioning system via the accessory belt. A correctly selected compressor reduces the risk of excessive vibration, noise, and loss of cooling efficiency, thereby improving driving comfort in both urban and highway conditions.

Benefits of using a used compressor

Choosing a used air conditioning compressor for the Ford Focus Mk2 ST/RS is a cost-effective solution that allows you to restore the system's efficiency without the need to invest in a new part. For many users, maintaining the original operating characteristics of the air conditioning is essential, which is ensured by a part originating from the same model line.

The main advantages of this solution include:

• maintaining factory fitment for the 2.5 petrol powertrain,
• the ability to restore full air conditioning functionality while reducing repair costs,
• consistency with other cabin cooling system components.

Before installation, a standard service procedure is recommended: checking the system for leaks, replacing the receiver-drier, and refilling the system with refrigerant according to the vehicle manufacturer's recommendations. This approach increases the chances of long-term and stable compressor operation.

Operation and service tips

In cars with a 2.5 petrol engine, especially in the ST and RS versions, the air conditioning system often operates under variable load conditions. Regular maintenance – checking the condition of the accessory belt, tensioner, hoses, and the correct refrigerant level – helps reduce the risk of premature compressor wear.

To better understand the symptoms of wear and the principles of safe replacement, it is worth reading the guide: Air conditioning compressor – failure symptoms, causes, and safe replacement. The article helps to assess when compressor replacement is necessary and how to prepare the system for the installation of a used component.

Expanding the air conditioning system in a Ford

If you are planning a comprehensive repair or upgrade of the air conditioning system area in your Ford and need other items from the same group, such as additional compressors, clutches, or related powertrain components, check the available parts in the Ford air conditioning compressors and clutches category.