Peterbilt Window Regulator R21-6012 HLK2529

The R21-6012 is the Left-Hand (Driver Side) electric window regulator for Peterbilt heavy-duty trucks.

• Part Number: R21-6012 (also referred to as R216012).

• Orientation: Driver Side / Left-Hand (LH).

• Type: Electric power window regulator.

• Application: Primarily fits the Peterbilt 335 model.

• Material: Generally features a silver-colored frame with plastic gear construction.

• Manufacturer: TinzerMotor

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:

Peterbilt Window Regulator R21-6012 HLK2529