Mercedes W221 Rear Brake Caliper Housing Left N/S A2214230781

Mercedes W221 Rear Brake Caliper Housing Left N/S is an original component from the Brake calipers and brackets group, designed for installation on the rear axle on the driver's side. This is a solution for users who want to maintain the factory braking characteristics and consistency of the braking system in their Mercedes by using a used, verified component.

Specifications and technical data

• SKU: A2214230781
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2214230781
• Substitutable numbers: A2214230781, A 221 423 07 81
• Location on the vehicle: Rear, Left
• Category: Calipers & Brackets

Purpose and vehicle placement

The presented caliper is designed to operate on the rear axle on the left side, which is crucial for the correct distribution of braking forces and vehicle stability. Proper placement ensures correct cooperation with the disc, pads, and other brake hydraulic components, minimizing the risk of uneven wear and vibrations during braking.

Thanks to its dedicated fit for the Mercedes W221 platform, the caliper housing and bracket work with factory mounting points, which facilitates installation and reduces the need for additional modifications to the suspension or wheel hubs.

Technical characteristics of the caliper housing

The caliper housing has been designed as a rigid, deformation-resistant structure that stably guides the brake pads relative to the disc. Such a design promotes even pressure and repeatable braking force, which translates into predictable vehicle behavior in emergency situations.

As an original Mercedes component, the caliper maintains factory manufacturing tolerances, which is important when working with safety systems such as ABS or ESP. The used housing serves as a good base for further operation or potential refurbishment if the user is planning a long-term brake system rebuild.

Practical application and benefits of installation

Replacing the rear left brake caliper is recommended in the case of:

• uneven braking on the left and right sides of the rear axle,
• seizing of guide pins or the piston,
• excessive pad wear on one side,
• mechanical damage to the housing or bracket.

Choosing an original, used caliper allows you to maintain the structural consistency of the braking system while reducing costs compared to new components. This solution is particularly beneficial for comprehensive repairs when discs, pads, or flexible hoses are being replaced in parallel.

Condition, verification, and part selection

The item is offered as a used OEM component, which means it comes from vehicle dismantling and retains the manufacturer's original specification. Before installation, a standard workshop inspection is recommended, including an assessment of working surfaces, mounting threads, and brake line ports, as well as replacing service seals if necessary.

To select the correct caliper for a specific engine and equipment version, it is worth using the OEM part number or interchangeable numbers visible in the technical specifications section. This helps avoid compatibility issues, especially in the case of different disc diameters or brake system variants within the same model generation.

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 caliper housings, mounting brackets, or guide supports, check the available parts in the Mercedes Brake calipers and brackets category.

Technical support and cost optimization

When choosing a used brake caliper, it is worth knowing the basic criteria for assessing its condition and ways to reduce service costs without compromising safety. A detailed discussion of these issues, along with practical tips on selection and operation, can be found in the article: Brake calipers under the microscope: How to effectively reduce brake system repair costs by choosing verified recycled parts.

Combining the original origin of the part with professional workshop installation allows for stable braking parameters and extends the service life of other system components, such as discs and pads. As a result, the Mercedes W221 Rear Brake Caliper Housing Left N/S is a sensible choice for drivers who expect a technically correct solution while maintaining control over the repair budget.