TRW PMN161 Brake Master Cylinder

Brake Master Cylinder for Mercedes-Benz SL500 and SL600

The TRW PMN161 brake master cylinder is a direct-fit hydraulic replacement for select 1999-2002 Mercedes-Benz SL500 and SL600 models. Built with an aluminum body and a straight bore design, it supports consistent brake pedal response in the master cylinder assembly.

Key Features

• TRW PMN161 brake master cylinder for select Mercedes-Benz SL500 and SL600 applications
• Aluminum master cylinder construction
• 26.99 mm bore diameter with straight bore type
• 2 mounting holes and 2 ports
• Dust boot included
• Gasket or seal included
• Primary outlet thread size: M12 x 1.0
• 2-piston design
• No reservoir included

Detailed Description

Designed for 1999-2002 Mercedes-Benz SL500 and 1999-2002 Mercedes-Benz SL600 models, the TRW PMN161 brake master cylinder is built for hydraulic brake system service where the original master cylinder has worn, leaked, or lost pedal consistency. The aluminum housing and 26.99 mm bore diameter support proper brake fluid pressure transfer through the system, while the included dust boot and gasket or seal help complete the service replacement. The TRW PMN161 is a practical choice when replacing the master cylinder on a Mercedes-Benz SL500 or Mercedes-Benz SL600 with the specified brake hydraulics layout.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Issues This Part Addresses

• Brake pedal that sinks under steady pressure
• External brake fluid leakage at the master cylinder
• Uneven or inconsistent hydraulic brake response
• Loss of braking performance caused by internal seal wear
• Contaminated or failing master cylinder components

Installation Notes and Tips

Verify the 2-port configuration, M12 x 1.0 primary outlet thread size, and 26.99 mm bore diameter before installation. This master cylinder does not include a reservoir, brake booster, push rod, mounting hardware, or mounting bracket, so reuse or source those components as required by the vehicle setup. Bench bleeding and a full brake system bleed are standard steps after installation to restore proper hydraulic operation.

Quality Assurance

TRW is a recognized name in brake hydraulics, and the PMN161 is built to match the specified application details for 1999-2002 Mercedes-Benz SL500 and SL600 models. Confirm fitment against the vehicle’s brake system configuration before ordering.