HELLA voltage stabiliser is used for cars with a start/stop system. It maintains stable power supply during engine start/stop cycles, ensuring uninterrupted operation of vehicle electronics. Typically installed on the passenger side,it prevents voltage drops when high-consumption systems like air conditioning or electric parking brakes are activated. Built to last-vibration and moisture resistant for long-term reliability in demanding conditions. Please check the original part number to ensure proper fitment for your vehicle. Number of connectors: 3 Control Unit/Software must NOT be trained/updated