Mercedes R172 Rear ABS Brake Wheel Speed Sensor Cable Right O/S A1725401705

Mercedes R172 Rear ABS Brake Wheel Speed Sensor Cable Right O/S is a precision brake system component responsible for accurate wheel speed readings and the proper operation of the ABS system. This used, original component ensures compatibility with the factory electrical installation and stable integration with the vehicle's electronics. Designed for installation on the rear right side, the sensor supports the consistent performance of the anti-lock braking system during heavy braking.

Specifications and technical data

• SKU: A1725401705
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1725401705
• Substitutable numbers: A1725401705, A 172 540 17 05
• Location on the vehicle: Rear, Right
• Category: ABS Speed Sensors

Function and role of the ABS speed sensor

The ABS speed sensor on the rear right axle of the Mercedes R172 monitors wheel rotation speed and transmits the signal to the brake system controller. Based on this data, the ABS system can dynamically adjust pressure in the brake circuit, preventing wheel lock-up and improving vehicle stability on wet, slippery, or uneven surfaces. A properly functioning sensor also ensures seamless interaction with other safety systems, such as traction control or electronic stability control.

Purpose and vehicle placement

The presented component is designed for installation on the rear axle, on the right side. This dedicated vehicle placement ensures correct cable routing geometry and proper positioning of the sensor relative to the impulse ring. As a result, the speed signal remains stable, and the risk of mechanical or electrical interference is minimized.

Selecting the correct sensor for the specific side of the vehicle is crucial for both safety and diagnostic accuracy – using a component with the correct specifications facilitates future maintenance and eliminates issues with error codes in the ABS controller memory.

Benefits of using an original Mercedes sensor

Choosing an original ABS speed sensor for a Mercedes provides a range of practical advantages:

• maintenance of factory operating parameters for the ABS and related systems,
• compatibility with the electrical harness and connectors used in the specific model,
• proper dimensional and mounting fit for the steering knuckle and rear axle mounts,
• easier computer diagnostics thanks to predictable signal characteristics.

A used, original component allows for cost-effective repairs while maintaining high manufacturing quality and compatibility with the factory brake system.

Selection and safety when purchasing used ABS components

When replacing an ABS speed sensor, it is worth paying attention to compatibility with the specific body style and brake system, as well as the condition of the connectors and signal cable. A properly selected component minimizes the risk of repeated intervention in the system and reduces the possibility of ABS errors appearing on the dashboard. If you want to streamline the process of selecting and installing anti-lock braking system components, our guide will be helpful: Second-hand brake systems: how to safely select discs, calipers, and ABS?.

Expanding your Mercedes ABS system upgrade

If you are planning a comprehensive repair or upgrade of the braking area in your Mercedes and need other components from the same group, such as additional sensors, signal cables, or mounting hardware, check out the available parts in the Mercedes ABS speed sensor category.