Dorman 42821 Passenger Side Windshield Wiper Arm Gloss Black Carbon Steel

The Dorman 42821 is a passenger side replacement windshield wiper arm engineered for select Isuzu commercial trucks. Built from carbon steel with a gloss black finish, this heavy-duty wiper arm measures 19.83 inches in length and is designed to restore proper wiper function when the original arm has worn out or failed.

Key Features:

• Direct OE Replacement – Engineered to match the fit and function of the original factory wiper arm
• Carbon Steel Construction – Durable gloss black carbon steel build for long service life in demanding commercial truck applications
• Restores Wiper Functionality – Reliable solution for arms that have failed due to spring wear, snow damage, or metal fatigue
• Passenger Side Fitment – Designed specifically for the right-hand (passenger) side of the vehicle
• 19.83" Arm Length – Maintains correct blade sweep geometry for clear windshield coverage
• Dorman HD Solutions – Part of Dorman's heavy-duty product line developed for fleet and owner-operator commercial vehicle applications

Wiper arms are a critical safety component, connecting the wiper motor to the blade and maintaining proper pressure against the windshield. Over time, the internal spring can weaken or the arm can suffer damage from ice and snow buildup, reducing wiper effectiveness. The Dorman 42821 provides a cost-effective, aftermarket-exclusive repair solution backed by Dorman's extensive automotive engineering experience.