Brake Caliper Mercedes W203 Rear Left N/S Wheel Brake Unit 290/36 A0034239698

Brake Caliper Mercedes W203 Rear Left N/S Wheel Brake Unit is an original braking system component designed for installation on the rear left axle of Mercedes vehicles. This used brake caliper from this series is a solution for drivers who want to restore proper braking force while maintaining factory mounting geometry and compatibility with stock components. By retaining the original design, it ensures stable operation of the braking system during daily use.

Specifications and technical data

• SKU: A0034239698
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0034239698
• Substitutable numbers: A0034239698, A 003 423 96 98
• Location on the vehicle: Rear, Left
• Category: Calipers & Brackets

Purpose and vehicle placement

The presented caliper is designed to operate on the rear left side of the vehicle, which is crucial for the correct distribution of braking force and the operation of the correction system. Installation in the correct position guarantees proper cooperation with the brake disc, pads, and brake line, as well as with brake assist systems.

Selecting a caliper dedicated to a specific axle and side of the vehicle minimizes the risk of installation problems, leaks, or uneven pad wear. This is particularly important in Mercedes cars, where the braking system is precisely tuned to the weight and suspension characteristics.

Construction and performance parameters

As an element from the Brake calipers and brackets group, this model is responsible for generating the clamping force of the pads against the disc and ensuring stable pad guidance within the caliper. The design intended for the rear axle provides appropriately selected braking force, matched to the vehicle's weight distribution and the operation of the ABS/ESP system.

Original manufacturing translates into:

• correct positioning relative to the brake disc,
• appropriate stiffness of the caliper body,
• stable operation of the piston and guide pins under typical road conditions.

Thanks to this, the caliper can be used both for standard replacement of worn parts and for restoring system functionality after accident repairs.

Condition and benefits of using a used part

The offered item is in used condition, which allows for a significant reduction in repair costs while maintaining the manufacturer's original specifications. In many cases, a used brake caliper is an optimal compromise between price and fitment for a specific model, especially in older generations of the Mercedes W203.

Choosing an original, used caliper instead of cheap replacements reduces the risk of installation problems, leaks, or improper piston operation. This solution is especially recommended where maintaining factory braking parameters and compatibility with other system components is a priority.

Part number matching and selection safety

This caliper has a dedicated OEM part number and interchangeable numbers, which facilitates precise identification and selection for a specific body version, engine, and model year. Before purchasing, it is worth comparing the markings with the vehicle data or seeking assistance from the seller to ensure full compatibility with the braking system in your Mercedes.

If you want to learn more about safely choosing brake components from the secondary market, check out our guide: Second-hand braking system: how to safely select discs, calipers, and ABS?. The article contains a practical checklist that will help verify the condition and fitment of used components.

Expanding the braking system in a Mercedes

If you are planning a comprehensive repair or upgrade of the braking area in your Mercedes and need other elements from the same group, such as additional calipers, mounting brackets, or guide supports, check the available parts in the Mercedes brake calipers and brackets category.

For drivers analyzing the cost-effectiveness of purchasing original, replacement, or used parts, the following comparative material may also be helpful: Original, replacement, or used – which car parts are the most cost-effective?. It makes it easier to choose a service strategy tailored to your budget and expectations regarding durability.