Voltage Regulator

The Bosch 12311726022 is a direct-fit voltage regulator specifically designed to work with Bosch alternators. This critical component regulates the output voltage from the alternator, preventing both undercharging of the battery and overvoltage that could damage sensitive electrical systems. It is an OEM replacement, manufactured by Hella, an original supplier to BMW. This voltage regulator is a common solution for electrical and charging issues that may not necessarily stem from a complete alternator failure. Replacing just the regulator can be a more cost-effective repair than replacing the entire alternator. This unit is compatible with Bosch 80A, 90A, 105A, 115A, and 140A alternators. The Bosch 12311726022 fits a wide range of BMW models across various series, including the E21, E30, E36, E28, E34, E32, E24, and M models. Specific fitments include models such as the 320i, 318i, 325e, 325i, M3, 528e, 533i, 535i, M5, 633CSi, 635CSi, M6, 735i, and 750iL. It is an OEM part, meeting BMW's design, fitment, and performance standards, and comes with a two-year warranty. Please note that electrical items are generally non-returnable.