Bosch AL4126N Alternator

Bosch AL4126N Alternator Overview

The Bosch AL4126N is a new 14-volt alternator built for charging-system performance and dependable electrical output. It is designed for select Kia Forte, Kia Forte5, and Hyundai Elantra applications, including 2017-2024 model years listed below.

Bosch Alternator (New) products are part of the Bosch Premium Alternators line, which focuses on tested construction and reliable operation for everyday driving and demanding electrical loads.

Key Features

• 14-volt alternator with 150-amp amperage rating
• Internal fan design for controlled cooling
• Internal regulator with external regulator included
• Negative ground configuration
• Clockwise rotation direction
• Decoupled or clutch pulley design
• Aluminum case with silver finish
• Short mounting configuration with single pivoted lever mounting type
• 6S pulley/belt type; pulley not included
• New unit, not remanufactured

Detailed Description

The Bosch AL4126N alternator is engineered for vehicles that need stable charging performance and consistent voltage control. With a 14-volt output, 150-amp rating, internal regulation, and a decoupled clutch pulley, this alternator supports modern electrical demands while maintaining smooth operation. The aluminum housing and internal fan help support durability in the charging system, and the clockwise rotation and short mounting configuration match the listed applications. This part number, AL4126N, is a direct replacement option for select Hyundai Elantra and Kia Forte platforms, including Kia Forte5 coverage for 2020.

This part cross-references 373002E721 for the same application.

Vehicle Fitment

• Fits 2019-2024 Kia Forte, N/A
• Fits 2017-2020 Hyundai Elantra, N/A
• Fits 2020 Kia Forte5, N/A

What It Helps Address

• Battery warning lights caused by weak charging output
• Dim headlights or unstable electrical performance
• Charging-system failure from worn internal components
• Voltage irregularities affecting vehicle electronics
• Noise or belt-related issues tied to alternator operation

Installation Notes and Tips

Verify the mounting configuration, pulley type, rotation direction, and electrical connections before installation. This alternator uses an internal regulator and includes an external regulator, so confirm the vehicle’s charging-system setup matches the listed specifications. The part is not one-wire capable and does not include a pulley, so reuse or source the correct belt-drive components as required by the application. Confirm fitment by year, make, and model before installation on a Kia Forte, Hyundai Elantra, or Kia Forte5.

Quality Assurance

Bosch Premium Alternators are built and tested to support reliable charging-system performance. The AL4126N is a new Bosch alternator designed to meet the specifications listed for the confirmed vehicle applications.