Dorman 42721 Windshield Wiper Arm - Front Left

Dorman 42721 Front Left Wiper Arm

This Dorman windshield wiper arm is built for specific vehicle applications and matches the fit and function of the original front left arm. It is a steel replacement designed for reliable wiping performance on classic GM full-size cars, including Buick LeSabre, Oldsmobile Delta 88, Pontiac Bonneville, Cadillac DeVille, Cadillac Fleetwood, and Oldsmobile 98.

• Specific-fit windshield wiper arm for the front left position
• Steel construction for strength and durability
• Black finish for a clean OE-style appearance
• 24.5-inch length
• Spine / flange nut attachment method
• Pin-style wiper end type
• Direct replacement for Dorman 42721

OE-Style Replacement Details

Dorman 42721 is engineered to restore the original wiper arm geometry and mounting style on the listed vehicles. The steel arm, black finish, and pin-style end are selected to match the factory configuration on front left applications. This part cross-references 427212 and 20695024 for the same application. If you need a Dorman 42721 windshield wiper arm for a 1985-1990 Cadillac DeVille front left or a 1986-1991 Buick LeSabre front left, this replacement is built for that exact position.

Fitment

• Fits 1986-1991 Buick LeSabre, front left.
• Fits 1986-1991 Oldsmobile Delta 88, front left.
• Fits 1987-1991 Pontiac Bonneville, front left.
• Fits 1985-1990 Cadillac DeVille, front left.
• Fits 1985-1990 Cadillac Fleetwood, front left.
• Fits 1985-1990 Oldsmobile 98, front left.

What It Helps Fix

• Wiper arm wear that reduces blade contact on the windshield
• Corrosion or bending in the original front left wiper arm
• Uneven wiping caused by a weakened arm spring or mounting wear
• Loss of proper sweep on the driver-side front windshield area
• Noise or chatter related to an unstable wiper arm assembly

Installation Notes and Tips

Confirm the vehicle year, make, model, and front left position before ordering. This part uses a spine / flange nut attachment and a pin-style wiper end, so match the original mounting and blade connection style during installation. No instruction manual is included.

Quality Assurance

Dorman designs this wiper arm to match the original fit and function of the factory part on the specified vehicles. The steel construction supports dependable service in a direct-replacement format.