Bosch AL4102X Alternator

Bosch AL4102X Alternator Overview

The Bosch AL4102X is a remanufactured 12-volt alternator built for charging-system replacement on select Hyundai Sonata and Kia Optima applications. It features a 110-amp rating, internal regulator, internal fan, and a pulley already included for a direct-fit service replacement.

Bosch Premium Alternators are part of a remanufactured product line focused on tested electrical performance and dependable operation. This AL4102X alternator is designed for vehicles that require a clockwise-rotation, 6-groove belt setup with a 59.8 mm outside pulley diameter.

Key Features

• Remanufactured Bosch alternator for 12-volt charging systems
• 110-amp amperage rating for OE-style electrical output
• Internal regulator and internal fan design
• Clockwise rotation direction
• Pulley included; 6-groove pulley type
• Aluminum case and aluminum case material
• Rear view main mounting ear plug clock position: 10 o’clock
• Not one-wire capable; no external regulator included

Detailed Description

Bosch AL4102X is a remanufactured alternator engineered for charging-system replacement on 2011-2013 Hyundai Sonata and 2012-2013 Kia Optima models. It is built with an internal regulator, internal cooling fan, and a 6S-CP pulley configuration to match the specified belt drive layout. The aluminum housing supports a lightweight, OE-style fit, while the 110-amp output supports stable electrical charging for the vehicle’s battery and accessories. This part cross-references VA 373002G150 for the same application.

What It Helps Address

• Battery warning light caused by alternator output loss
• Low charging voltage during driving
• Dim lights or electrical instability from weak charging performance
• Noise or wear related to a failing alternator assembly
• Starting issues tied to insufficient battery recharge

Installation Notes and Tips

Verify pulley groove count, rotation direction, plug clock position, and mounting-ear orientation before installation. This alternator is not one-wire capable and does not use an external regulator, so the vehicle’s charging connector and regulator configuration must match the listed specifications. Confirm belt alignment and electrical connections on the Hyundai Sonata or Kia Optima application before returning the vehicle to service.

Quality Assurance

Bosch Premium Alternators are remanufactured, tested, and built to support reliable charging-system performance. The AL4102X is intended as a direct replacement for the listed fitments and follows Bosch’s electrical component standards for remanufactured alternators.