Audi A3 8P Rear Brake Caliper Wheel Brake Unit Left N/S 1K0615423C

Audi A3 8P Rear Brake Caliper Wheel Brake Unit Left N/S is an original, used part from the Brake Calipers and Brackets group, designed for installation on the rear axle on the driver's side. This component allows for the restoration of proper braking system operation, ensuring stable pad guidance and even pressure on the disc during braking.

Specifications and technical data

• SKU: 1K0615423C
• Mark: Audi
• Condition: Used
• OEM Part Number: 1K0615423C
• Substitutable numbers: 1K0615423C, 1K0 615 423 C
• Location on the vehicle: Rear, Left
• Category: Calipers & Brackets

Purpose and function in the braking system

The presented rear left brake caliper is dedicated to the rear axle of the Audi A3 8P generation and operates on the left side, i.e., the driver's side. Its task is to convert hydraulic pressure from the brake master cylinder into clamping force of the pads against the disc, which directly affects braking efficiency and vehicle stability during deceleration. Thanks to its factory design, the caliper maintains the correct pad guidance geometry, which reduces the risk of uneven wear and unwanted vibrations. A properly selected rear left component helps maintain the correct balance of braking forces between the wheels, which is essential for both safety and the operation of assistance systems such as ABS or traction control.

Benefits of using an original caliper

Choosing an original brake caliper for an Audi translates into a number of practical operational benefits:

• Precise fit to the hub and carrier – no need for modifications or adjustments to mounting elements.
• Consistency with the factory braking system characteristics – maintaining the braking force and modulation intended by the manufacturer.
• Reduced risk of noise and vibration thanks to the proper rigidity of the caliper body.
• Easier diagnostics and service, as the design is well-known to workshops specializing in the Audi brand. A used, original element of this class is a sensible choice for repairs where both safety and operational economy are important.

Installation on the rear left axle and service aspects

The caliper is intended for installation on the rear left side of the vehicle, which is important when selecting parts in pairs and when planning service for the entire axle. During replacement, it is recommended to check the condition of the pads, discs, and brake lines to fully utilize the potential of the newly installed component. Professional installation includes, among other things, thorough cleaning of contact surfaces, proper system bleeding, and verification of the free movement of the guide pins. A correctly installed caliper ensures a predictable brake pedal response, even pad wear, and stable vehicle behavior during intensive braking.

Safe selection of a used brake caliper

When choosing a used brake caliper, it is crucial to pay attention to compatibility with the specific version of the Audi A3 8P, the placement on the vehicle, and the condition of the working elements. It is also worth relying on a proven source of parts, which minimizes the risk of operational problems after installation. If you want to deepen your knowledge on the conscious selection of braking system components from the secondary market, a practical supplement would be the article: Second-hand braking system – how to safely choose discs, calipers, and ABS?. There, you will find a checklist that helps assess the condition of used components before purchase.

Expansion and modernization of the Audi braking system

If you are planning a comprehensive repair or modernization of the braking zone in your Audi and need other elements from the same group, such as additional calipers, brackets, or mounting hardware, check the available parts in the Audi Brake Calipers and Brackets category.