Mercedes W166 Brake Caliper Front Right O/S Wheel Braking Unit A1664211481

Mercedes W166 Brake Caliper Front Right O/S Wheel Braking Unit is an original braking system component designed for installation on the front axle on the passenger side. Thanks to the factory Mercedes design, it ensures precise fitment to the hub and disc, as well as stable operation with the standard braking system, which translates into predictable, safe braking. This is a solution for users who are looking for a proven OEM component instead of universal replacements.

Specifications and technical data

• SKU: A1664211481
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1664211481
• Substitutable numbers: A1664211481, A 166 421 14 81
• Location on the vehicle: Front, Right
• Category: Calipers & Brackets

Purpose and vehicle placement

The offered caliper is designed for installation on the front axle on the right side, which is crucial for the correct distribution of braking forces in the vehicle. The structural design, the arrangement of mounting points, and the brake line ports are optimized for the specific suspension geometry of the Mercedes W166 series, which facilitates installation and reduces the risk of leaks or improper alignment of the pads relative to the disc.

Technical characteristics of the caliper

The front right brake caliper is responsible for evenly pressing the pads against the disc, stabilizing the braking force, and maintaining the correct path of the pad throughout its wear range. The caliper body has been designed to:

• ensure structural rigidity under high thermal and mechanical loads,
• maintain even pressure on the friction surface of the pads,
• reduce vibration and noise during braking.

The original Mercedes solution guarantees compatibility with factory pads and discs, as well as correct cooperation with braking assistance systems, such as ABS or ESP, which require predictable caliper operating characteristics.

Benefits of using an original brake caliper

Using a factory caliper in a Mercedes W166 allows you to maintain braking parameters in accordance with the manufacturer's specifications. In practice, this means:

• stable and repeatable braking system performance across a wide range of operating temperatures,
• correct interaction with the vehicle's electronics responsible for traction and stability control,
• easier diagnostics and service in the future, thanks to the preservation of the original system architecture.

For users who use the vehicle intensively – e.g., on highways or with heavier loads – maintaining the factory caliper specification is particularly important from the point of view of safety and the predictability of the car's reactions.

Condition, verification, and practical application

The offered item comes from the Brake calipers and brackets category and is a used component, which allows for optimizing repair costs while maintaining the original Mercedes design. This type of solution is often chosen for:

• replacing a damaged caliper after mechanical failure or corrosion,
• post-collision repairs involving the front suspension and braking system,
• restoring full efficiency of the braking system after long-term use.

Thanks to the preservation of factory mounting points and geometry, installation in place of a worn-out element is simple for the workshop and does not require modification of other components, which reduces vehicle downtime.

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 calipers, brackets, or guide mounts, check the available parts in the Mercedes Brake calipers and brackets category.

Safe selection of used braking system components

When choosing a used brake caliper, it is crucial to pay attention to the condition of the body, threads, line ports, and guides, as well as compatibility with the specific version of the braking system in a given vehicle. It is worth using inspection procedures and checklists developed specifically for brake components – you will find them in the article "Second-hand braking system: how to safely choose discs, calipers, and ABS?", which discusses step-by-step what to look for when buying used components.

If you are considering whether a new or used part would be a better solution in your case, it may be helpful to compare the costs and durability described in the material "Car parts – new or used? We compare costs, quality, and durability", which will facilitate making an informed service decision.