Bosch 1986AE0124 Alternator Voltage Regulator with Brush Holder

The Bosch 1986AE0124 is an OE-quality alternator voltage regulator designed to control and maintain proper electrical system voltage in European vehicles. This electronic regulator is responsible for controlling the voltage output from your alternator, ensuring steady and reliable electrical power to protect sensitive components from voltage spikes or fluctuations.

Key Features:

• OEM Bosch quality voltage regulator for alternator assemblies
• Includes integrated brush holder for complete installation
• Rated voltage: 14V with 14.5V regulation set point
• Electronic regulator with lamp activation circuit
• Durable black plastic construction resistant to fading and cracking
• Direct replacement for multiple OE part numbers across Audi, Porsche, Mercedes-Benz, Volkswagen, Seat, and Skoda

This regulator is designed for Bosch IR/IF alternator systems and provides battery disconnect, shorted lamp, and shorted field circuit protection. Replaces OEM part numbers including 038903803E, 038903803EX, 00004320637, A0031545306, and supersedes Bosch part numbers F00M144136, F00M145200, F00M145209, F00M145350, and F00MA45232. The voltage regulator is a common failure point in alternator systems and is significantly more cost-effective to replace than the entire alternator assembly.