Audi RS3 8Y Wheel Ventilated Brake Disc Front Left Right N/O/S Set 4M0615301BJ

Description

Brake discs from the Audi RS3 8Y Wheel Ventilated Brake Disc Front Left Right N/O/S Set are genuine Audi braking system components, designed for operation on the front axle on both the left and right sides. The ventilated design ensures stable heat dissipation, which translates into consistent, predictable braking in demanding road conditions.

Specifications and technical data

• SKU: 4M0615301BJ
• Mark: Audi
• Condition: Used
• OEM Part Number: 4M0615301BJ
• Substitutable numbers: 4M0615301BJ, 4M0 615 301 BJ
• Location on the vehicle: Front, Left, Right
• Category: Brake Disc Rotors

Purpose and function in the braking system

The presented set of discs is designed as a front axle component, covering both the left and right sides. This allows for a consistent replacement of both sides simultaneously, which promotes uniform operation of the braking system and reduces the risk of differences in braking performance between the wheels.

The ventilated structure of the discs supports effective cooling during intensive use, typical for dynamic Audi RS models. This reduces susceptibility to overheating and helps maintain stable friction between the brake pad and the working surface of the disc.

Benefits of using genuine Audi discs

Genuine Audi brake discs are designed for the specific geometry of the hub, caliper, and braking assistance systems of a given model. This translates into:

• precise fitment to the steering knuckle and brake calipers,
• proper cooperation with factory safety systems,
• preservation of factory braking characteristics.

As a result, the braking system maintains parameters close to factory specifications, and the response to pressing the brake pedal remains predictable and consistent with the manufacturer’s design.

Characteristics of the ventilated design

Ventilated brake discs utilize internal air channels that increase the heat dissipation surface. In practice, this means:

• better resistance to brake fade during repeated, heavy braking,
• more uniform temperature distribution within the disc,
• reduced risk of thermal deformation under high loads.

This type of construction is particularly beneficial in higher-power vehicles, where the braking system operates under greater thermal load.

Condition and service application

This item belongs to the Brake discs category and is offered as a used part, which allows for economical repair or upgrade of the braking system while maintaining the manufacturer’s original specifications. This type of solution is often chosen in situations where the priority is to combine compliance with factory parameters with control over service costs.

Placement on the vehicle covers the front on the left and right sides, which facilitates selection when planning comprehensive front axle brake service.

Support in selection and expansion of the braking system

If you are planning a comprehensive repair or upgrade of the braking zone in your Audi and need other components from the same group, such as additional sets of discs, compatible brake pad sets, or supplementary brake lines, check the available parts in the Audi brake discs category.

When selecting used braking system components, it is worth following a proven verification procedure. A detailed list of steps on what to look for when purchasing discs, calipers, and ABS components can be found in the article: Second-hand braking system: how to safely select discs, calipers, and ABS?.