Bosch 1986AE0045 Charging System Voltage Regulator

Bosch Voltage Regulator for BMW Charging Systems

Bosch 1986AE0045 is a new 12-volt internal charging system voltage regulator for select BMW applications. It is built with a 150-amp rating, a blade terminal design, and a fasten connector with male connector and terminal ends for direct electrical integration.

Compatible With BMW 128i, 328i, 328i xDrive, 528i, 528i xDrive, X3, X5, 323i, 328xi, and 528xi applications across the 2007-2013 model years. Bosch Voltage Regulator 1986AE0045 is a fitment-based replacement for BMW charging system service where the regulator is serviced internally.

Key Features

• Brand: Bosch Voltage Regulator
• Part number: 1986AE0045
• 12-volt internal voltage regulator
• 150-amp amperage rating
• Blade terminal type with 2 terminals
• Fasten connector, male connector, and male terminal ends
• New replacement component for charging system repair
• Mounting hardware and mounting bracket are not included

Detailed Description

Bosch 1986AE0045 is a charging system voltage regulator used in alternator and generator related electrical service. The internal mounting position and 2-terminal blade connection layout support direct replacement in the specified BMW charging systems. This Bosch Voltage Regulator is intended for vehicles that use a 12-volt regulator with a 150-amp charging setup, helping restore stable alternator output control in the applications listed below. For BMW 328i, BMW X5, and other covered models, the part number 1986AE0045 should be matched to the vehicle’s original regulator configuration before installation.

What It Helps Address

• Charging voltage that is too high or too low
• Battery warning light related to regulator failure
• Inconsistent alternator output control
• Electrical system instability caused by worn regulator components
• Starting and charging complaints tied to regulator malfunction

Installation Notes and Tips

• Verify the alternator/regulator design before ordering; this unit uses an internal mounting position.
• Confirm the connector shape, terminal type, and terminal count match the original part.
• Inspect the alternator, battery, and charging circuit for related wear before reassembly.
• Use the vehicle service information for BMW 128i, 328i, 528i, X3, and X5 applications to confirm proper fitment.

Quality Assurance

Bosch is a recognized OE-focused brand in automotive electrical components, and this new voltage regulator is built for the specified charging system applications. Part number 1986AE0045 should be used as the primary reference when confirming replacement fitment.

Compatible Vehicles

• Fits 2008-2013 BMW 128i, Voltage Regulator
• Fits 2007-2013 BMW 328i, Voltage Regulator
• Fits 2009-2013 BMW 328i xDrive, Voltage Regulator
• Fits 2008-2010 BMW 528i, Voltage Regulator
• Fits 2009-2010 BMW 528i xDrive, Voltage Regulator
• Fits 2007-2010 BMW X3, Voltage Regulator
• Fits 2007-2010 BMW X5, Voltage Regulator
• Fits 2007-2009 BMW 323i, Voltage Regulator
• Fits 2007-2008 BMW 328xi, Voltage Regulator
• Fits 2008 BMW 528xi, Voltage Regulator