Bosch AL4238X Alternator

Bosch AL4238X Remanufactured Alternator

The Bosch AL4238X remanufactured alternator is built for 12-volt charging systems and is engineered for dependable electrical output in daily driving conditions. It is a direct-fit replacement for select Mazda 3 and Mazda 5 applications, with fitment coverage for 2004-2006 Mazda 3 and 2006-2007 Mazda 5.

Key Features

• Remanufactured Bosch alternator for 12-volt systems
• 90-amp amperage rating for charging-system service
• Internal fan and internal regulator design
• Clockwise rotation direction
• Includes pulley and external fan
• 6-groove pulley with 49 mm outside diameter
• Aluminum case and aluminum case material
• Plug type 303 with rear-view plug clock position at 9 o’clock

Product Details

Bosch Premium Alternators are remanufactured, built, and tested to deliver consistent electrical performance and reliability. The AL4238X follows that product line approach with a remanufactured construction, internal cooling fan, internal voltage regulation, and a 6S pulley setup for the specified Mazda charging-system applications. This part number, AL4238X, is a practical OE-style replacement for drivers servicing a Mazda 3 or Mazda 5 charging system.

This part cross-references LF5018300 for the same application.

What It Helps Address

• Battery warning light caused by alternator output issues
• Low charging voltage during normal driving
• Dim lights or electrical instability from weak charging performance
• Starting problems related to insufficient battery recharge
• Charging-system failure on select Mazda 3 and Mazda 5 models

Installation Notes and Tips

Verify the plug type, pulley configuration, rotation direction, and mounting-ear orientation before installation. Confirm vehicle application against the listed fitment: Fits 2004-2006 Mazda 3, N/A and Fits 2006-2007 Mazda 5, N/A. Inspect the belt condition, electrical connections, and charging-system wiring during replacement to help ensure proper operation after installation of the Bosch AL4238X.

Quality Assurance

Bosch remanufactured alternators are built and tested to meet defined performance and reliability standards for charging-system service. The AL4238X is designed as a remanufactured replacement for select Mazda applications, with specifications aligned to the listed fitment and electrical requirements.