Navistar Window Motor 2505421C91 16639428

The 2505421C91 is a TinzerMotor made Navistar International electric window regulator motor designed for the right-hand (passenger) side. It is a critical component for controlling the vertical movement of the door glass in various heavy-duty International truck series.

Key Specifications

Part Number: 2505421C91 (Current OEM number).

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

Type: Electric Actuator / Window Motor.

Weight: Approximately 2.08 to 5 lbs.

Dimensions: Roughly 6.5 x 2.5 x 6.3 inches.

Left-Hand Equivalent: The corresponding driver-side motor is 2505420C91.

Vehicle Fitment

This motor is compatible with a wide range of International (Navistar) commercial and vocational vehicles, including: 

4000 Series: International 4400.

8000 Series: International 8600 (common in 2007 models).

Vocational Models: Used in 7-Ton and 11-Ton models (typically around 2004).

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

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Navistar Window Motor 2505421C91 16639428