Mercedes R171 W203 W209 Front Brake Disc Plate Left Right N/O/S Set A2034211312

Brake discs from the Mercedes R171 W203 W209 Front Brake Disc Plate Left Right N/O/S Set are original braking system components designed for installation on the front axle, on both the left and right sides. The product comes from disassembly, which ensures factory-fit compatibility with specific Mercedes models and provides a practical solution for braking system maintenance. This is a beneficial option for drivers looking for parts with proven mounting geometry and compatibility with factory calipers and hubs.

Specifications and technical data

• SKU: A2034211312
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2034211312
• Substitutable numbers: A2034211312, A 203 421 13 12
• Location on the vehicle: Front, Left, Right
• Part type: Brake Disc Rotor
• Category: Brake Disc Rotors

Purpose and vehicle placement

The presented set is designed for operation on the front axle, with dedicated mounting for the left and right sides. This solution facilitates the servicing of the entire axle – components on both sides can be replaced in a single operation, maintaining technical and visual consistency. The design is adapted to the factory Mercedes braking system, which promotes proper disc guidance relative to the caliper and stable operation of the entire system.

Technical and functional characteristics

The brake disc set has been developed to maintain proper rigidity and resistance to thermal loads typical for the vehicle's front axle. The appropriately selected profile and working surface work in conjunction with stock brake pads, ensuring predictable behavior during emergency braking and daily use. The use of an original Mercedes solution reduces the risk of vibrations, lateral runout, and uneven pad wear.

Thanks to the factory design, the correct geometry relative to the hub and ABS sensors is maintained, which is important for braking force stability and the proper operation of assistance systems. This is particularly significant for cars equipped with advanced safety systems, where dimensional tolerances of braking components must be maintained at an appropriate level.

Application in Mercedes models

The set is intended for Mercedes vehicles from the R171, W203, and W209 families, where the braking system is based on front discs with parameters consistent with the manufacturer's factory specifications. Choosing original parts from disassembly allows for maintaining structural consistency with other system elements, such as calipers, hubs, or shields, without the need for modifications.

When selecting parts, it is worth verifying compatibility with the specific engine version and equipment level of the vehicle using the OEM part number and interchangeable numbers available in the technical specification. This allows for precise matching of the set to a given car and avoids installation issues.

Condition, installation, and benefits of choosing used discs

The offered set belongs to the category of used brake discs, which represents a reasonable compromise between cost and maintaining the factory design. Such components are frequently chosen for routine repairs, restorations, and returning a vehicle to its original specification. Installation follows the standard service procedure for the Mercedes front axle, using factory mounting points.

By choosing an original solution from disassembly, you gain, among other things:

• factory fitment to the hub, caliper, and brake hardware,
• consistency with vehicle safety systems,
• the possibility of economical repair while maintaining OEM construction.

Braking system service expansion and technical knowledge

If you are planning a comprehensive repair or upgrade of the braking zone in your Mercedes and need other elements from the same group, such as additional discs, pads, or brake lines, check the available parts in the Mercedes brake discs category.

When selecting components from the secondary market, it is worth following proven procedures and evaluation criteria. Detailed tips on the safe selection of used components can be found in the article "Second-hand braking system: how to safely choose discs, calipers, and ABS?", which provides a practical checklist for informed users.