Rear ABS Wheel Speed Sensor for Mercedes-Benz M-Class W164 GL-Class X164 R-Class W251 ML350 GL450 R350 2006-2012, Replaces 1645400717 A1645400717, Anti-Lock Brake Sensor Left or Right

REAR LEFT OR RIGHT UNIVERSAL FITMENT SIMPLIFIES YOUR REPAIR – Saturnovexis ABS wheel speed sensor fits both rear left and rear right positions on compatible Mercedes-Benz W164, X164, and W251 platform vehicles. Unlike earlier W163 models that required four different part numbers for each wheel, this single sensor covers both rear sides, reducing inventory complexity and ensuring you always have the correct part regardless of which rear sensor has failed. Simply identify the failed side, order one sensor, and install.

MERCEDES-SPECIFIC WEATHERPROOF CONNECTOR AND REINFORCED HOUSING – Features a factory-style 2-pin weatherproof electrical connector that mates precisely with the W164/X164/W251 chassis harness without modification, maintaining the moisture-tight seal required for reliable underbody operation. The reinforced plastic and brass housing is specifically engineered to withstand exposure to road salt, debris, and extreme temperature cycles from -40°F to 300°F. The 7mm installation hole diameter matches the original mounting specification exactly.

RESTORE ABS ESP AND TRACTION CONTROL SAFETY ON REAR AXLE – A failing rear wheel speed sensor triggers the ABS warning light, disables Electronic Stability Program (ESP), deactivates traction control, and may cause erratic speedometer behavior or transmission shifting issues on these vehicles. Saturnovexis sensor uses a high-sensitivity active magnetic element tested to match OE output voltage, resistance, and trigger gap specifications, ensuring accurate rear wheel speed data delivery to the brake control module for safe anti-lock braking performance and stable vehicle dynamics.

VERIFIED FITMENT ACROSS THREE MERCEDES-BENZ PLATFORMS – Direct replacement for OE numbers 1645400717, A1645400717, and 1649058300. Compatible with Mercedes-Benz ML 320/350/450/500/550/63 AMG (W164, 2006-2011), GL 320/350/450/550 (X164, 2007-2012), and R 320/350/500/63 AMG (W251, 2006-2011). Note: This listing is for the rear sensor only (left or right). Front left and front right use OE 1645400917. Always verify fitment via VIN prior to purchase.

PLUG-AND-PLAY INSTALLATION WITH DEDICATED SUPPORT – No wire splicing, soldering, or programming required. Simply unbolt the old sensor from the rear knuckle, disconnect the electrical plug, and bolt in the new Saturnovexis unit. Typical DIY installation takes 15-25 minutes with basic hand tools. Package includes 1x ABS wheel speed sensor with protective terminal cap. Use an OBD2 scanner after installation to clear stored ABS/ESP fault codes. Backed by Saturnovexis customer support team for technical assistance.

The Saturnovexis Rear ABS Wheel Speed Sensor is specifically engineered for 2006-2012 Mercedes-Benz W164 M-Class, X164 GL-Class, and W251 R-Class vehicles, replacing OE part number 1645400717 (A1645400717). This sensor fits both rear left and rear right positions, providing a universal rear axle repair solution with a single part number.

Unlike the earlier W163 M-Class platform which required four distinct wheel speed sensors (one for each corner), the W164/X164/W251 platform uses only two part numbers: 1645400917 for both front wheels and 1645400717 for both rear wheels. This design simplification means vehicle owners and repair professionals can stock fewer parts while maintaining complete coverage for all four wheel positions.

When the original rear wheel speed sensor fails due to internal circuit degradation, wire chafing from rear suspension movement, or connector corrosion from road salt exposure, the ABS and ESP control modules lose accurate rear wheel speed data. On W164/X164/W251 vehicles, this can additionally affect transmission shifting behavior, cruise control operation, and 4MATIC all-wheel-drive system functionality. Each Saturnovexis sensor features an active magnetic sensing element calibrated to match OE output specifications, a reinforced plastic and brass housing for superior underbody durability, and a Mercedes-specific weatherproof connector that maintains the factory moisture seal.

Every sensor undergoes continuity and signal output validation testing before packaging to guarantee out-of-box functionality. Components meet automotive environmental standards and comply with European RoHS directives.

Compatible Vehicles (Rear Left or Rear Right)

Mercedes-Benz ML 320 CDI (2007-2009), ML 350 (2006-2011), ML 450 Hybrid (2010), ML 500 (2006-2007), ML 550 (2008-2011), ML 63 AMG (2007-2011), GL 320 CDI (2007-2009), GL 350 CDI (2010), GL 450 (2007-2012), GL 550 (2008-2012), R 320 CDI (2007-2009), R 350 (2007-2011), R 500 (2007), R 63 AMG (2006). Always verify fitment via VIN prior to purchase.