Audi A4 B7 B8 Front Wheel Brake Caliper Housing Brake Unit Right O/S 4E0615124A

Audi A4 B7 B8 Front Wheel Brake Caliper Housing Brake Unit Right O/S is a component from the Brake calipers and carriers group, designed for operation on the front right axle of the Audi braking system. This used, original component ensures proper pad alignment relative to the disc and stable transmission of braking forces, which translates into predictable vehicle behavior and safe deceleration.

Specifications and technical data

• SKU: 4E0615124A
• Mark: Audi
• Condition: Used
• OEM Part Number: 4E0615124A
• Substitutable numbers: 4E0615124A, 4E0 615 124 A
• Location on the vehicle: Front, Right
• Category: Calipers & Brackets

Purpose and fitment

The presented caliper is designed for operation on the front right side of the vehicle, which is crucial for the correct distribution of braking forces and compatibility with the hub, brake disc, and brake pads. The design intended for Audi A4 B7 and B8 generation models allows for maintaining the factory geometry of the braking system, and thus maintaining the braking performance parameters specified by the manufacturer.

Thanks to the use of an original Audi solution, the caliper works with factory-supplied accompanying components, such as the carrier, brake hose, or pad wear sensors (if present in the specific configuration), which facilitates installation and reduces the risk of fitment issues.

Construction and function in the braking system

The brake caliper acts as a precision guide for the brake pads and generates pressure on the disc when the brake pedal is engaged. In practice, this means that it:

• keeps the pads aligned with the disc axis, minimizing uneven wear of the friction material,
• ensures stable transmission of pressure from the hydraulic system to the working surface of the pads,
• maintains the appropriate operating clearance after the brake is released, reducing rolling resistance.

A properly selected caliper for the front right side of the vehicle helps maintain even system operation between the left and right sides of the axle, which is essential for vehicle stability during emergency braking and for the correct operation of assistance systems such as ABS or ESP.

Benefits of using an original Audi caliper

Choosing a used, original Audi caliper for the A4 B7/B8 is a solution that combines reasonable cost with the preservation of factory operating parameters. The most important advantages include:

• Factory fitment – preservation of original mounting points and geometry, which facilitates installation and maintenance.
• Consistency with other system components – compatibility with the brake discs and pads specified by the manufacturer.
• Stable operating parameters – proper pad guidance and even distribution of braking forces on the front axle.

For users who are upgrading or restoring the factory configuration of the braking system, such a caliper is a practical choice, allowing for the maintenance of predictable vehicle behavior in daily operation.

Selection and safety when purchasing a used caliper

When choosing a used brake caliper, it is crucial to pay attention to compatibility with the specific body version, brake system type, and vehicle placement. It is also worth verifying whether the given unit corresponds to Audi factory parameters and whether it has the appropriate manufacturer markings, which facilitates identification and selection of the correct component.

If you want to organize the selection process and learn a checklist for purchasing used brake system components, check out our guide: Second-hand braking system: how to safely select discs, calipers, and ABS?. The article discusses practical criteria for assessing technical condition and points out what to look for when purchasing in an online store.

Expanding the Audi braking system

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 additional calipers, carriers, or mounting brackets, check out the available parts in the Audi brake calipers and carriers category.

Summary

Audi A4 B7 B8 Front Wheel Brake Caliper Housing Brake Unit Right O/S is a practical choice for drivers who want to restore the efficiency of their braking system or replace a worn-out component with an original equivalent. Proper placement on the vehicle, compatibility with the front axle design, and the preservation of factory operating parameters make this a solution that is technically consistent with the manufacturer's specifications and beneficial for daily operation.