Xenon headlight prestage device module for D4S and D4R prestage systems - Part numbers: 85967 45010, 85967 02010, 8596745010, 81107750 - Quantity: 1 piece - Function: Prestages the xenon headlamp to ensure correct ignition timing and beam alignment for reliable HID operation - Compatibility: Designed for D4S and D4R prestage equipment; uses the listed part numbers - Size: not specified - Material: not specified - Performance: Supports stable prestage performance, reducing misalignment or ignition issues and ensuring consistent light output - Use scenarios: - Replace a faulty prestage module in a D4S or D4R xenon headlight during maintenance - Retrofit or refurbish a headlight system to restore proper prestage timing and beam pattern - Stock a single unit for repair shops to quickly service D4S/D4R prestage configurations