Bosch KS01000020 Rack and Pinion Assembly

Bosch Hydraulic Steering Rack for Mercedes-Benz

The Bosch KS01000020 is a remanufactured hydraulic rack and pinion assembly for select Mercedes-Benz SUVs and crossovers. It is built for direct replacement service on vehicles that use hydraulic steering and require a remanufactured steering rack solution.

Key Features

• Remanufactured hydraulic steering rack and pinion assembly
• Bosch steering rack, hydraulic (remanufactured) product line
• Direct-fit replacement for select Mercedes-Benz GL-Class and M-Class applications
• One unit required per vehicle
• Cross-references Mercedes-Benz part numbers 1644600125 and 1644600500 for the same application

Detailed Description

This Bosch steering rack is engineered for Mercedes-Benz vehicles equipped with hydraulic steering, including GL350, GL450, GL550, GL320, ML350, ML450, ML550, ML63 AMG, ML320, and ML500 applications listed below. The KS01000020 remanufactured rack and pinion assembly provides a service replacement for worn or leaking steering gear units while maintaining the original hydraulic steering layout. Bosch’s remanufactured steering rack line focuses on restoring the core assembly to service-ready condition for vehicles that need a direct replacement steering gear.

Compatible With: Fits 2010-2012 Mercedes-Benz GL350, N/A; Fits 2008-2012 Mercedes-Benz GL450, N/A; Fits 2008-2012 Mercedes-Benz GL550, N/A; Fits 2008-2009 Mercedes-Benz GL320, N/A; Fits 2006-2011 Mercedes-Benz ML350, N/A, without Electronic Active Steering; Fits 2010-2011 Mercedes-Benz ML350, N/A; Fits 2010-2011 Mercedes-Benz ML450, N/A; Fits 2008-2011 Mercedes-Benz ML550, N/A, without Electronic Active Steering; Fits 2007-2011 Mercedes-Benz ML63 AMG, N/A, without Electronic Active Steering; Fits 2007-2009 Mercedes-Benz ML320, N/A, without Electronic Active Steering; Fits 2006-2007 Mercedes-Benz ML500, N/A, without Electronic Active Steering.

Common Steering Issues This Part Can Address

• Steering play or looseness from a worn rack and pinion assembly
• Hydraulic fluid leakage from the steering gear
• Uneven or inconsistent steering response
• Noisy steering operation caused by internal rack wear
• Excessive effort when turning the wheel on hydraulic steering systems

Installation Notes and Tips

Verify the vehicle’s steering system before ordering, especially on ML and ML63 AMG applications that require the version without Electronic Active Steering. Confirm the original part number and compare the existing steering rack configuration to the vehicle listing. After installation, the hydraulic system should be properly bled and inspected for leaks, steering wheel centering, and alignment.

Quality Assurance

Bosch remanufactured steering components are serviced to meet application-specific replacement needs for Mercedes-Benz steering systems. This part is identified as a remanufactured unit and is intended for direct replacement use on the listed GL-Class and M-Class vehicles.