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Peterbilt Window Regulator R21-6012R HLK2530

To Replace:
Peterbilt
For Vehicle:

Peterbilt 

335 model 05-10


Part No.:

HLK2530

R21-6012R


Tinzer No.
33G12-R
  • Introduction
  • factory
The R21-6012R is a right-hand (passenger side) electric window regulator specifically for Peterbilt heavy-duty trucks. It is a direct replacement for the original equipment manufacturer (OEM) part.
Core Specifications
  • Part Number: R21-6012R (Passenger Side / RH).

  • Application: Designed primarily for the Peterbilt 335 model.

  • Type: Electric power window regulator.

  • Mounting: Bolt-on attachment for easy installation.

  • Components: Typically includes the regulator frame; some aftermarket versions are sold as a complete motor and regulator assembly.

Key Features & Compatibility
  • OEM Reference: Direct aftermarket replacement for Peterbilt OEM part numbers R21-6012R and WNR021003-R.

  • Build Material: Features a silver-colored frame with durable plastic gear construction.

  • Left-Hand Equivalent: The matching driver-side (LH) part number is R21-6012.


  • Installation Overview
  • To replace the regulator, follow these general steps found in technical guides:
  • Preparation: Wear eye protection and ensure the ignition is off.

  • Removal: Remove the inner door panel and disconnect wiring (speakers, lights). Unbolt the old regulator while supporting the window glass to prevent it from falling.

  • Installation: Insert the new regulator through the access hole and bolt it to the door panel. For electric models, reconnect the motor plug and test the travel before reassembling the door trim.

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 R21-6012R HLK2530

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