Mercedes W166 Wheel Brake Caliper Housing Rear Left N/S A1664230781

The Mercedes W166 Rear Left Brake Caliper Housing is an original brake system component from the Brake Calipers and Brackets group, designed for installation on the left side of the vehicle. This product is from a dismantled vehicle, which allows for the preservation of factory mounting geometry and performance characteristics while reducing service costs. It's a solution for users who expect compatibility with the factory Mercedes braking system.

Specifications and technical data

• SKU: A1664230781-2
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1664230781
• Substitutable numbers: A1664230781, A 166 423 07 81
• Location on the vehicle: Rear, Left
• Part type: Brake Caliper
• Category: Calipers & Brackets

Intended Use and Function in the Braking System

The described brake caliper housing is designed for operation on the left side of the front axle, ensuring stable pad guidance and uniform transfer of braking forces to the disc. The design intended for the Mercedes W166 platform guarantees correct positioning relative to the hub and disc, which is crucial for braking effectiveness and even wear of friction components.

Original origin from the Mercedes brand means that factory dimensional tolerances are maintained, ensuring the housing works correctly with the standard sliders, pistons, and brake hose mounts intended for this model.

Benefits of Using an Original Caliper Housing

Using a used, original brake caliper housing allows for:

• maintaining the factory braking system's performance characteristics without the need for adapter parts,
• preserving correct alignment with the disc, which promotes even pad pressure,
• reducing repair costs compared to purchasing a new caliper assembly.

For workshops and individual users, it is also important that the housing comes from the same production line as other system components, which facilitates diagnostics and subsequent service.

Condition and Preparation for Further Operation

The component is offered as used, which in practice means that before installation, a standard service procedure is recommended: thorough cleaning, inspection of working surfaces, threads, and mounting points, and if necessary, replacement of seals and guides. This approach allows for the full utilization of salvaged parts while maintaining an appropriate level of safety and durability.

Thanks to the preservation of the original design, the housing performs well both for a typical replacement of a worn caliper and for repairs aimed at restoring the factory braking parameters in a Mercedes W166 vehicle.

Fitment, Identification, and Reference Numbers

Precise fitment of this caliper housing to a specific vehicle version is facilitated by factory manufacturer markings and available interchangeable numbers, visible in the technical specifications section. When selecting parts, it is advisable to compare the markings with the currently installed component and the vehicle's documentation, which minimizes the risk of error and speeds up the repair process.

In case of doubts about compatibility, it is also helpful to pay attention to the vehicle's location – this housing is intended for installation on the left side, on the front axle, in the braking system of the Mercedes W166 family.

Expanding Brake System Service

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

To better plan repairs and consciously use salvaged parts, it is worth familiarizing yourself with practical tips on selecting and operating such components – these are discussed in detail in the article Brake Calipers Under the Magnifying Glass: How to Effectively Reduce Braking System Repair Costs by Choosing Proven Salvaged Parts.