Bosch AL4100X Alternator

Bosch Remanufactured Alternator AL4100X

The Bosch AL4100X is a remanufactured 12-volt alternator built for charging-system performance and dependable electrical output. It is a direct-fit replacement for select 2010-2012 Kia Rio, 2010-2011 Hyundai Accent, and 2010-2011 Kia Rio5 applications.

Bosch Premium Alternators are remanufactured, tested, and built to deliver consistent operation in everyday driving conditions. The AL4100X includes an internal regulator, internal fan, and pulley, with a clockwise rotation design for the specified applications.

Key Features

• 12-volt remanufactured alternator for charging-system replacement
• 90 amp amperage rating for OE-style electrical output
• Internal regulator and internal fan design
• Pulley included with 4-groove, 4S belt type
• Clockwise rotation
• Aluminum case and aluminum case material
• Plug type 468 with rear-view plug clock position at 11 o’clock
• Direct replacement for Bosch AL4100X applications

Detailed Description

The Bosch AL4100X alternator is engineered as a remanufactured charging component for vehicles that require a 12-volt, 90-amp unit with an internal voltage regulator. Its aluminum housing helps keep the unit lightweight, while the internal fan supports cooling during operation. The included pulley and 4-groove belt configuration match the specified OE-style setup for the listed Kia and Hyundai vehicles. This part cross-references VA 3730026100 for the same application.

Compatible With 2010-2012 Kia Rio, N/A; 2010-2011 Hyundai Accent, N/A; and 2010-2011 Kia Rio5, N/A. If you are replacing a failing charging unit on a Kia Rio, Hyundai Accent, or Kia Rio5, Bosch AL4100X provides the correct fitment details for those model years.

Common Problems This Part Can Address

• Battery warning light caused by alternator output loss
• Low charging voltage during driving
• Dim headlights or unstable electrical performance
• Battery drain after the engine is running
• Charging-system failure from a worn alternator assembly

Installation Notes and Tips

Verify the plug type, pulley groove count, rotation direction, and mounting configuration before installation. Confirm that the vehicle uses the listed 12-volt, 90-amp alternator specification and compare the existing unit to the Bosch AL4100X before removal. After installation, check charging voltage at the battery and inspect belt alignment and tension.

Quality Assurance

Bosch remanufactured alternators are built, tested, and inspected to meet the performance and reliability expectations associated with the Bosch Premium Alternators line. The AL4100X is intended for direct replacement in the listed Kia and Hyundai applications.