Buick GM Oxygen Sensor 12584050 Multi-OEM Replacement 12584050/12607333

Buick general oxygen sensor 12584050 as a replacement, using the same zirconia ceramic element as OEM; welding process meets OEM standards; durability tested on benches; life over 60,000 km. Directly corresponds to OEM 12584050 and compatible with 12607333, 12612430, 250-24649; fits Buick Excelle, Regal, LaCrosse 2.0L/2.4L. Monitors exhaust oxygen content and feeds ECU with air–fuel ratio signals to ensure combustion efficiency.