Weichai Engine NOx Sensor 5WK97106 Special for Emission Monitoring

This D2S ballast is designed for BMW 3-Series (E90/E91/E92/E93, 2005-2013), 5-Series (E60/E61, 2003-2010) and X5 (E70, 2007-2013), for engines from 2.0L to 4.8L. Core function is to stably convert 12V to 85V high voltage to ignite xenon lamps, ensuring reliable night-time illumination. OEM numbers include 5DV007760-71, 4B0941471 and 63128386708 for quick cross-check. Replacement difficulty medium; professional technician recommended; disconnect battery negative before installation and insulate high-voltage module. Ballast uses KLP brand OEM standard with EMI design to extend bulb life and reduce faults; suitable for bulk purchase for maintenance or refurbishment.