Bosch 1986AE0155 Alternator Voltage Regulator 12V with Brush Holder

The Bosch 1 986 AE0 155 is a direct-fit alternator voltage regulator with integrated brush holder, designed as a precision replacement for Bosch alternators used across the Volkswagen Audi Group (VAG) platform. Built to Bosch OEM standards, this regulator maintains proper charging system output to protect the vehicle's battery and electrical components.

The voltage regulator controls the output of the alternator by regulating field current, ensuring the charging voltage remains stable at 14V operating voltage on a 12V electrical system. A faulty regulator can cause symptoms such as battery warning lights, chronic undercharging, or overcharging — making this a critical charging system component.

Key Features:

• 12V system voltage / 14V operating (charging) voltage
• Includes integrated brush holder assembly
• OEM-quality Bosch construction for reliable, long-lasting performance
• Direct replacement — no modification required
• New unit (not remanufactured)

Cross-Reference Part Numbers:

• OEM / OE Reference: VW 07K903803
• Bosch Internal Reference: F 00M 144 197
• WAI: IB6197
• EAN: 4047026581041

This Bosch alternator voltage regulator is a trusted OEM-grade solution for restoring proper charging system function on compatible Audi, Seat, Skoda, and Volkswagen vehicles equipped with Bosch alternators.