Mack Window Regulator 11QX55M 85145984

The 11QX55M  85145984 25155866 803957 PAP803957 is the Right-Hand (Passenger Side) electric window regulator for Mack CH, CL, and CX heavy-duty truck models, primarily for those manufactured between 1999 and 2013.

Key Specifications

Part Number: 11QX55M  85145984 25155866 803957 PAP803957

Position: Right-Hand (RH) / Passenger Side.

Operation: Electric window regulator  (Power).

Left-Hand Equivalent: The corresponding driver-side part is the 11QX56M. 

Vehicle Fitment

This part is a standard electric truck regulator for Mack's vocational and heavy-duty series:

Mack CH Models: (1999–2013).

Mack CL Models: (1999–2013).

Mack CX Models: (1999–2013).

Cross-Reference & Aftermarket

Mack OEM: 25155866, 85145984.

PAI Industries: 803957

Quality and Testing

TinzerMotor produces these window regulators and window motors with a focus on long-term high quality and mechanical reliability:

Heavy-Duty Construction: Uses thickened steel plate components and reinforced pivot points to prevent the "sagging" or jamming common in lower-quality aftermarket parts.

Extensive Testing: Each unit undergoes rigorous cycle testing, involving thousands of manual rotations under simulated glass weight to ensure the internal gears do not strip or slip over time.

Precision Fit: Designed to align perfectly with the original door mounting holes, ensuring a "bolt-on" installation without the need for drilling or modification.

Please contact: 

Ms Riva  

Wechat/WhatsApp +86 15355970956 

Email: riva@ruishuoautoparts.com

Alibaba Shop linkage:

Mack Window Regulator 11QX55M 85145984