Bosch 1986AE0138 Alternator Voltage Regulator

The Bosch 1986AE0138 is an OEM-quality alternator voltage regulator designed to maintain proper electrical system voltage and protect sensitive electronics from power fluctuations. This genuine Bosch component ensures your vehicle's alternator delivers consistent, regulated power to the electrical system and battery.

Key Features:

• 12-volt electrical system voltage regulator
• Includes integrated brush holder assembly
• Direct replacement for OEM part numbers including Mercedes-Benz 0041540106, 0031544406, and others
• Also marketed as Bosch F00M144158, F00M145310, F00M145378, and F00M145886
• Precision-engineered to prevent voltage spikes that can damage electronic components
• Durable construction for reliable long-term performance

Voltage regulators control the electrical output from your alternator, preventing excessive voltage that could harm sensitive electronics while ensuring adequate charging power reaches the battery. If you're experiencing dimming lights, voltage fluctuations, or premature battery failure, a faulty voltage regulator is often the culprit. This Bosch regulator is commonly used in Mercedes-Benz CLK, E-Class, R-Class, and CLS models equipped with specific Bosch alternators.