Audi A8 D4 4H Brake Caliper Front Left N/S 356X34MM 4G0615123B

Visual condition of the part

The product shows signs of use visible in the photos. Audi A8 D4 4H Brake Caliper Front Left N/S 356X34MM is an original component from the Brake Calipers and Brackets group, designed for use with a large 356x34 mm brake disc. This used OEM component ensures a proper fit for the Audi A8 D4 generation braking system, maintaining factory performance parameters and stability during heavy braking. It is a solution for users looking for a technically verified part at a reasonable price.

Specifications and technical data

• SKU: 4G0615123B-2
• Mark: Audi
• Condition: Used
• OEM Part Number: 4G0615123B
• Substitutable numbers: 4G0615123B, 4G0 615 123 B
• Part type: Brake Caliper
• Category: Calipers & Brackets

Purpose and function in the braking system

The described front left brake caliper is a working component of the braking system, responsible for precisely pressing the brake pads against the 356x34 mm disc. Thanks to its design, adapted to the weight and performance of the Audi A8 D4 4H, it ensures stable deceleration, even distribution of braking forces, and predictable vehicle behavior in emergency situations. As an OEM part from Audi, it maintains compatibility with the factory geometry of the steering knuckle, hub, and disc, which reduces the risk of uneven pad wear and brake pedal vibration. Installing the correct caliper on the left side (N/S – near side) helps maintain the symmetry of the entire front axle operation.

Benefits of using an original used caliper

Choosing a used, original caliper for the Audi A8 D4 4H is a compromise between cost and safety. Compared to cheap replacements, the OEM component:

• maintains factory mounting points and proper pad guidance,
• is designed for a specific 356x34 mm disc diameter and thickness,
• ensures predictable braking force characteristics on the front axle. As a result, the braking system maintains structural integrity, and the driver receives a repeatable response to brake pedal pressure, which is particularly important in heavier, comfortable A8-class luxury sedans.

Installation aspects and fitment

The Audi A8 D4 4H Brake Caliper Front Left N/S 356X34MM is intended for direct installation in place of the factory component on the driver's side (in left-hand drive versions – near side). Using an original part from the Brake Calipers and Brackets group facilitates the mechanic's work, as it does not require mounting adaptations or interference with the steering knuckle structure. Before installation, a standard service procedure is recommended: checking the surface of the guide pins, inspecting the condition of the brake hose, bleeding the system, and verifying the thickness of the disc and pads. A correctly installed caliper working with a 356x34 mm disc allows for maintaining the balance of braking forces between the left and right sides.

Practical application and service recommendations

This caliper model is particularly recommended for:

• replacing a damaged or seized caliper on the left side,
• repairs after collisions involving the front suspension and braking system,
• servicing the braking system in vehicles operated dynamically or with high mileage. To maximize the system's potential, it is worth checking the condition of the right caliper, discs, and pads in parallel, so that the entire front axle operates under similar conditions. Component consistency has a direct impact on vehicle stability when braking from higher speeds. 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, supports, or brackets, check the available parts in the Audi Brake Calipers and Brackets category.

How to reduce brake system repair costs

Using original, used brake calipers allows for significant reduction in service costs while maintaining an appropriate level of safety. The key is to correctly select the component for the specific version of the Audi A8 D4 4H and perform the installation according to the manufacturer's procedure. A properly selected caliper working with a 356x34 mm disc can operate for a long time and stably, provided the braking system is serviced regularly. If you want to better understand how to safely use recycled parts and what to look for when choosing a used caliper, check out our guide: Brake calipers under the microscope: How to effectively reduce brake system repair costs by choosing verified recycled parts.