Audi Q3 8U 2.0 TFSI Brake Servo Master Cylinder Unit 5N2614105K

Visual condition of the part

The product shows signs of use visible in the photos.

Audi Q3 8U 2.0 TFSI Brake Servo Master Cylinder Unit is an original component from the Brake Servos and Proportioning Valves group, designed for diesel-powered vehicles. This OEM solution ensures stable brake assistance, predictable braking force modulation, and consistency with the factory Audi brake system architecture.

Specifications and technical data

• SKU: RHD-5N2614105K
• Mark: Audi
• Condition: Used
• OEM Part Number: 5N2614105K
• Substitutable numbers: 5N2614105K, 5N2 614 105 K
• Fuel type: Diesel
• Category: Brake Servos

Purpose and role in the braking system

The described brake servo and master cylinder unit is responsible for increasing the pressure force on the brake pedal and precisely distributing pressure within the brake circuits. In a vehicle such as the Audi Q3 8U with a diesel engine, this is a critical safety component that influences braking distance, vehicle stability, and the comfort of driver assistance systems.

The factory design ensures:

• maintenance of operating parameters in accordance with the vehicle manufacturer's specifications,
• proper cooperation with ABS/ESP systems,
• assistance characteristics appropriately matched to the weight and dynamics of the Audi Q3 8U.

Benefits of using an original brake servo

Using an original brake servo and master cylinder unit in an Audi allows you to maintain the integrity of the entire braking system without the need for adaptations or modifications to the installation. The OEM element is designed for a specific vehicle platform, which means it:

• fits factory mounts and brake lines,
• maintains the correct brake pedal travel characteristics,
• reduces the risk of improper operation of safety systems.

Choosing a used, original component from this group is often an economical way to restore full efficiency to the braking system while maintaining compliance with the manufacturer's documentation.

Condition, verification, and application in service practice

The item comes from disassembly and is offered as a used part, which allows for an attractive repair cost while maintaining factory specifications. Before installation in the vehicle, a standard service procedure is recommended, including checking the system for leaks, bleeding the system, and verifying brake pedal operation during a test drive.

In workshop practice, the brake servo and master cylinder unit is most often replaced in situations such as:

• loss of brake assistance,
• incorrect pedal feel (too hard or "spongy" travel),
• leaks around the master cylinder.

Thanks to the original design, the installation process is predictable for the mechanic, and the vehicle regains proper braking parameters after the repair.

Integration with the diesel engine vehicle system

In cars with a diesel engine, the vacuum system and the operating characteristics of the power unit differ from gasoline versions, which is why selecting the appropriate brake servo is of significant importance. The offered unit is intended for the diesel configuration, which promotes proper cooperation with the vacuum system and ensures stable assistance across the full range of engine loads.

If you are planning a comprehensive repair or upgrade of the braking zone in your Audi and need other elements from the same group, such as servos, proportioning valves, or complete assistance units, check the available parts in the Audi Brake Servos and Proportioning Valves category.

Technical support and selection of used parts

When selecting used braking system components, it is worth following the manufacturer's documentation and service practice. Additional tips regarding the selection of subassemblies, their operation, and maintenance can be found in the article Air conditioning and heating – selection of parts and maintenance for year-round comfort, which discusses the principles of working with used OEM components in modern vehicles.

If you want to better plan your repair budget and consciously choose subassemblies from the secondary market, the guide Used parts – your guide to the best offers in the automotive store will also be helpful, describing practical criteria for assessing the condition of parts and how to use them safely.