Dorman 300-877 Alternator Pulley

Alternator Pulley for Audi and Volkswagen

Dorman 300-877 is a serpentine alternator pulley built to match the original fit and function on select Audi and Volkswagen applications. It uses a bolt-on attachment style, a steel contact surface, and a black finish for a direct replacement focused on dependable operation.

Compatible with 2007-2010 Audi Q7, 2004-2010 Volkswagen Touareg, and 2000 Volkswagen Passat, this alternator pulley supports OE-style service on vehicles that rely on a serpentine drive system. Part number 300-877 is also referenced for related applications under 021903119J and G93009.

Key Features

• Direct replacement alternator pulley for select charging system repairs
• Serpentine pulley design for applications using a belt-driven alternator
• Bolt-on attachment type for OE-style mounting
• Steel contact surface for durability in demanding engine bay conditions
• Black finish for a clean, factory-style appearance
• Designed to match original fit and function on specified vehicles

Detailed Description

Dorman 300-877 is engineered as an alternator pulley replacement for vehicles that use a serpentine belt drive. With a 2.4-inch outside diameter and a 0.67-inch bore size, it is built to align with the original pulley dimensions on listed applications. The steel contact surface supports consistent belt engagement, while the bolt-on design helps maintain the intended alternator drive setup. For buyers searching for a 2007-2010 Audi Q7 alternator pulley or a 2004-2010 Volkswagen Touareg alternator pulley, this part provides a direct-fit service option. It also fits the 2000 Volkswagen Passat in the listed application.

This part cross-references 021903119J and G93009 for the same application.

What It Helps Fix

• Worn or damaged alternator pulley surfaces
• Belt drive noise caused by pulley wear
• Charging system issues related to pulley failure
• Improper alternator belt tracking on serpentine systems
• Factory pulley replacement needs during alternator service

Installation Notes and Tips

Verify pulley dimensions, bore size, and attachment style before installation. This pulley uses a bolt-on design and does not include installation hardware, so confirm the required service parts are on hand before beginning work. Inspect the serpentine belt, tensioner, and alternator drive components at the same time to help avoid repeat repairs.

Quality Assurance

Dorman manufactures replacement components to match original fit and function on specified applications. Part number 300-877 is built from quality materials for reliable performance and durability in routine charging system service.