Bosch AL3393X Alternator

Bosch AL3393X Alternator Overview

The Bosch AL3393X is a remanufactured 12-volt alternator built for steady charging performance in select Lexus applications. It is designed with an internal fan, internal regulator, and included pulley to support dependable electrical output in daily driving.

Compatible with 2005-2006 Lexus LS430 and 2006-2007 Lexus GS430, this Bosch alternator matches the OE-style charging system layout for direct replacement service. The AL3393X is a practical choice when the original alternator is no longer maintaining proper system voltage.

Key Features

• Remanufactured Bosch alternator for charging system replacement
• 12-volt design with 130 amp output rating
• Internal regulator and internal fan for integrated operation
• Clockwise rotation with 6-groove pulley included
• Aluminum case and aluminum housing construction
• Outside pulley diameter: 56.4 mm
• Plug clock rear view main mounting ear at 6 o’clock
• 6S pulley/belt type

Product Line Details

Bosch Premium Alternators are remanufactured, then built and tested to support consistent performance and reliability. The Bosch alternator line focuses on charging-system accuracy and OE-style fitment for vehicles that depend on stable electrical output.

Detailed Description

The Bosch AL3393X alternator is engineered for Lexus GS430 and Lexus LS430 charging system service where a direct-fit remanufactured replacement is needed. With a 130 amp amperage rating, internal voltage regulation, and a pulley already installed, it is configured to restore alternator function without changing the vehicle’s charging-system design. The aluminum case helps keep the unit lightweight while maintaining the structural layout expected for this application. This part cross-references ND 2706050340 for the same application.

What This Alternator Helps Address

• Battery warning light caused by alternator output loss
• Low charging voltage during idle or driving
• Dim lights or electrical instability from weak charging performance
• Charging system noise related to worn alternator components
• Failure of the original alternator in Lexus GS430 or LS430 applications

Installation Notes and Tips

Verify pulley groove count, rotation direction, plug clock position, and mounting-ear orientation before installation. Confirm the vehicle uses the listed 12-volt charging system and compare the original alternator to the Bosch AL3393X for connector and bracket alignment. After installation, check charging voltage at the battery and inspect belt tracking on the 6-groove pulley.

Fits 2005-2006 Lexus LS430, N/A. Fits 2006-2007 Lexus GS430, N/A.

Quality Assurance

Bosch remanufactured alternators are built and tested to support reliable charging-system operation. The AL3393X is produced to meet the fitment and performance expectations of the listed Lexus applications.