Audi Q3 8U Brake Caliper Wheel Braking Unit Rear Right O/S 8U0615404B

The Audi Q3 8U Rear Right Brake Caliper is an original part from the Brake Calipers and Brackets group, designed for the rear right axle of the vehicle. The design engineered by Audi ensures proper fitment with the braking system and stable pad guidance relative to the disc, which translates to predictable vehicle behavior during braking.

Specifications and technical data

• SKU: 8U0615404B
• Mark: Audi
• Condition: Used
• OEM Part Number: 8U0615404B
• Substitutable numbers: 8U0615404B, 8U0 615 404 B
• Location on the vehicle: Rear, Right
• Category: Calipers & Brackets

Intended Use and Vehicle Placement

The presented caliper is dedicated for installation on the rear right side of the Audi Q3 8U generation braking system. It is responsible for evenly pressing the pads against the disc, stabilizing braking force on the rear axle, and supporting the vehicle's safety systems. Precise placement on the vehicle facilitates part selection and reduces the risk of ordering errors.

Construction and Technical Function

The brake caliper belongs to the group of components responsible for converting hydraulic pressure into mechanical force that presses the pad against the disc. The caliper body is designed for stable pad guidance, resistance to thermal loads, and maintaining adequate rigidity during intensive braking.

In practice, this means:

• secure pad guidance relative to the disc,
• maintaining piston axiality,
• proper cooperation with the factory brake line and caliper bracket,
• maintaining braking characteristics consistent with the vehicle manufacturer's specifications.

Benefits of Using an Original Audi Caliper

Using an original caliper in the Audi Q3 8U allows for the preservation of the braking system's original operating characteristics. A component from the same design group as other system components minimizes the risk of fitment issues, leaks, or uneven pad wear. This is particularly important in vehicles equipped with advanced driver-assistance systems, where braking stability directly impacts the effectiveness of the electronics.

A used brake caliper represents a reasonable compromise between repair cost and maintaining original technical specifications. With proper installation and the use of appropriate pads and discs, it can work effectively in daily operation, ensuring predictable and repeatable braking system performance.

Selection, Installation, and Compatibility

To correctly select this part, pay attention to the manufacturer's markings and its placement on the vehicle. A caliper intended for the rear right side should not be used on the opposite side of the axle, as structural differences can affect bleeding, brake line routing, and mechanism operation.

During installation, it is recommended to:

• check the condition of the caliper bracket, guide pins, and dust boots,
• replace the brake fluid according to the vehicle manufacturer's recommendations,
• properly bleed the system after completing the work,
• check for free piston return after pressing the brake pedal several times.

This approach allows for the full utilization of the caliper's potential and reduces the risk of disc overheating, vehicle pulling during braking, or accelerated pad wear.

Technical Support and Additional Information

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

To better understand how to safely use used brake system components and how to optimally reduce repair costs, it is worth reading the guide: Brake Calipers Under the Microscope: How to Effectively Reduce Brake System Repair Costs by Choosing Proven Used Parts. You will find practical tips on selecting, verifying, and operating such components there.