Bosch AL4300X Alternator

Bosch AL4300X Alternator Overview

The Bosch AL4300X is a remanufactured 12-volt alternator built for dependable charging performance in 1990-1994 Subaru Legacy applications. It is a direct-fit electrical replacement for vehicles that need a 70-amp alternator with the correct pulley, plug type, and mounting configuration.

Bosch Premium Alternators are remanufactured, tested, and built to deliver consistent output and reliable operation. For Subaru Legacy owners looking for an OE-style charging system replacement, the AL4300X provides the specifications needed for proper fitment and function.

Key Features

• Remanufactured Bosch alternator for charging system service
• 12-volt design with 70-amp amperage rating
• Internal fan and internal regulator configuration
• Clockwise rotation direction
• Includes pulley and external fan
• 5-groove pulley with 52 mm outside diameter
• Aluminum case and aluminum case material
• Plug type 353 with rear-view plug clock position at 6 o’clock
• Direct replacement for Subaru Legacy models listed below

Detailed Description

The Bosch AL4300X alternator is engineered as a remanufactured charging component for 1990-1994 Subaru Legacy models. It uses a 12-volt electrical design, internal fan, internal regulator, and clockwise rotation to match the required charging system setup. The aluminum housing supports a lightweight, OE-style construction, while the included pulley and 5S pulley type help maintain the correct belt interface.

This part cross-references Subaru OE number 23700AA090 for the same application. If you are replacing a worn alternator on a Subaru Legacy, Bosch AL4300X offers the fitment and electrical specifications needed for a proper charging-system repair.

Vehicle Fitment

• Fits 1990-1994 Subaru Legacy, N/A

Common Repair Uses

• Battery warning light caused by alternator output loss
• Dim headlights or unstable electrical performance
• Charging system failure after alternator wear
• Noise or belt-drive issues related to alternator replacement
• Restoring proper charging voltage in Subaru Legacy models

Installation Notes and Tips

Verify the plug type, pulley configuration, rotation direction, and mounting ear orientation before installation. Confirm belt alignment and inspect the charging circuit, battery condition, and related wiring during replacement. This alternator is listed for Subaru Legacy applications only, so match the vehicle year and configuration before ordering.

Quality Assurance

Bosch Premium Alternators are remanufactured and tested to meet performance and reliability expectations for charging-system service. The AL4300X is built for consistent electrical output and dependable operation in the specified Subaru Legacy fitment range.