Bosch AL4303X Alternator

Bosch Remanufactured Alternator AL4303X

Bosch AL4303X is a remanufactured 12-volt alternator built for steady charging performance and dependable electrical output. It is a direct-fit charging system replacement for select Subaru Forester, Impreza, Legacy, and Outback applications.

Key Features

• Remanufactured Bosch alternator for charging system service
• 12-volt, 110-amp output
• Internal fan design with clockwise rotation
• Internal regulator with external regulator included
• 5-groove pulley included, 57 mm outside pulley diameter
• Aluminum case and aluminum case color
• Plug type 325 with rear-view plug clock at 11 o’clock
• One-wire capable: No

Product Line Details

Bosch Premium Alternators are remanufactured, tested charging components built to deliver consistent electrical performance and reliability. The AL4303X follows that product-line focus with application-specific fitment and the hardware and electrical configuration needed for the listed Subaru vehicles.

Detailed Description

This Bosch alternator, part number AL4303X, is engineered as a remanufactured replacement for vehicles that need stable battery charging and proper electrical system support. It cross-references Subaru 23700AA522 for the same application. Compatible applications include Fits 2005 Subaru Legacy, N/A; Fits 2005 Subaru Outback, N/A; Fits 2006-2007 Subaru Forester, N/A; Fits 2006-2010 Subaru Impreza, N/A; and Fits 2009-2010 Subaru Forester, N/A. If you are searching for a Bosch AL4303X alternator for Subaru Forester, Impreza, Legacy, or Outback charging repair, this unit matches the listed fitment and electrical specifications.

Common Issues This Part Can Address

• Battery warning light caused by alternator output loss
• Low charging voltage at the battery
• Dim lights or unstable electrical performance
• Charging system noise related to alternator wear
• Failure of the original alternator’s internal components

Installation Notes and Tips

Verify pulley groove count, plug style, rotation direction, and mounting-ear orientation before installation. Confirm the vehicle’s charging-system wiring and belt condition during replacement, and inspect the battery and related connections after the alternator is installed. For Subaru Forester, Impreza, Legacy, and Outback applications, matching the OE-style electrical connector and pulley configuration is important for proper fit.

Quality Assurance

Bosch remanufactured alternators are built and tested to meet charging-system performance requirements for the listed applications. The AL4303X is a remanufactured electrical component intended to restore dependable alternator function in the specified Subaru fitments.