Remy 12938 Alternator

Remanufactured Alternator for Mercedes-Benz V8 Charging Systems

The Remy 12938 is a premium remanufactured 12-volt alternator built for higher-output charging demands. With a 220-amp rating, internal fan, internal voltage regulator, and clockwise rotation, it serves Mercedes-Benz applications that require stable electrical output and OE-style fitment.

Compatible with Mercedes-Benz S450, S550, and CL550 applications listed below, this Remy Premium Remanufactured alternator is built around Bosch OE specifications for direct replacement use. The Remy 12938 is a practical choice when the original charging system is no longer maintaining proper battery charge or system voltage.

Key Features

• 220-amp amperage rating for high-capacity charging output
• 12-volt alternator with internal voltage regulator
• Internal fan design for integrated cooling
• Pulley included for application-specific replacement
• Clockwise rotation direction
• Remanufactured to OE manufacturer Bosch specifications
• Remy part number 12938 for catalog and service lookup

Product Line Details

Remy Premium Remanufactured parts are positioned for buyers who want a remanufactured electrical component built to OE-style requirements. For this alternator, that means attention to the Bosch-based design, output rating, regulator type, and pulley configuration needed for the listed Mercedes-Benz charging systems.

Detailed Description

This alternator is used in Mercedes-Benz S450, S550, and CL550 models with the fitment shown below. The 220-amp output supports vehicles with greater electrical demand, while the internal regulator helps maintain charging control within the alternator assembly. If you are replacing a failing Mercedes-Benz alternator, Remy 12938 provides a direct-service solution for the specified applications.

This part cross-references Bosch 0-121-813-006 and Mercedes-Benz 013-154-55-02 for the same application.

Vehicle Fitment

• Fits 2010-2011 Mercedes-Benz S450, N/A; 220 Amps; Premium Remanufactured
• Fits 2009-2010 Mercedes-Benz CL550, N/A; Opt; 220 Amps; Premium Remanufactured
• Fits 2010 Mercedes-Benz S550, N/A; High Capacity; To Chassis/VIN A 322942; 220 Amps; Premium Remanufactured
• Fits 2007-2009 Mercedes-Benz S550, N/A; Opt; 220 Amps; Premium Remanufactured

Common Replacement Reasons

• Battery warning light or charging system fault
• Low system voltage during driving or idle
• Dim lights or inconsistent electrical performance
• Alternator bearing noise or charging output loss
• Failure in a Mercedes-Benz S450, S550, or CL550 charging circuit

Installation Notes and Tips

Verify the vehicle’s year, model, and VIN break before ordering, especially for the 2010 Mercedes-Benz S550 application noted to chassis/VIN A 322942. Confirm pulley style, rotation direction, and electrical connector match the original unit before installation. After replacement, inspect the battery and charging circuit to confirm proper system voltage.

Quality Assurance

Remy Premium Remanufactured components are remanufactured to OE manufacturer Bosch specifications for the listed applications. The Remy 12938 is built for direct replacement use in the confirmed Mercedes-Benz fitments shown above.