Brake Disc Plate Mercedes W221 Rear Left N/S Protection Plate A2214200144

Brake Disc Plate Mercedes W221 Rear Left N/S Protection Plate is a precisely fitted brake system component, designed specifically for the rear left side of the axle in W221 generation S-Class models. This used, original protection plate provides solid protection for the disc against contaminants, supporting stable brake operation and maintaining predictable braking performance.

Specifications and technical data

• SKU: A2214200144
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2214200144
• Substitutable numbers: A2214200144, A 221 420 01 44, BG
• Location on the vehicle: Rear, Left
• Category: Brake Disc Rotors

Function and role of the brake disc protection plate

The brake disc protection plate on the rear left side performs an important protective function in the braking system. It shields the working surface of the disc from water, mud, road salt, and small stones, which reduces the risk of accelerated wear and unwanted vibrations during braking. Thanks to its shape dedicated to the W221, the proper distance from the disc and caliper is maintained, which promotes the smooth operation of the entire system.

Dedicated fit for Mercedes W221

The rear left brake disc protection plate has been designed with the suspension and brake geometry of the Mercedes S-Class W221 in mind. This means appropriate placement of mounting points, the correct profile matched to the hub, and compatibility with factory discs and calipers. Using an original component allows for maintaining the factory airflow for disc cooling, which is important during intensive vehicle use.

Benefits of using an original, used protection plate

Choosing an original, used brake disc protection plate for a Mercedes W221 is a sensible solution for drivers who want to maintain the structural integrity of the braking system at controlled costs. The component from dismantling retains its factory geometry, which facilitates installation and minimizes the risk of fitment issues. Using parts consistent with the manufacturer's design promotes predictable vehicle behavior during braking and reduces the risk of improper disc operation.

Installation in the rear axle zone

The protection plate is intended for installation in the rear left area of the braking system. During replacement, it is worth paying attention to:

• the condition of the mounting surfaces at the steering knuckle or control arm,
• the cleanliness of adjacent components (hub, disc, caliper),
• the correct positioning of the plate relative to the disc, without rubbing.

A properly installed protection plate should not come into contact with the disc or moving parts, and its task is to create an effective protective barrier around the brake's working zone.

Safe selection of used braking system components

When assembling used components for the braking system – such as protection plates, discs, or calipers – it is worth following proven verification procedures. A detailed list of steps on what to look for when purchasing second-hand parts can be found in the guide Second-hand braking system: how to safely select discs, calipers, and ABS?, which helps assess the condition of parts and their fitment for a specific car model.

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 discs, pads, or brake lines, check the available parts in the Mercedes Brake Discs category.