Opel, Buick Excelle, Chevrolet Cruze Oxygen Sensor 12655677 55569902, Universal Type, extends engine life

When your Opel Astra/Opel Corsa shows idle instability, obvious fuel consumption rise, weak acceleration, or engine check light on, oxygen sensor aging or failure is likely; sensor monitors exhaust oxygen and provides data to ECU to optimize fueling. This sensor fits OEM numbers 12655677, 55569902, 12645561 and 12666673 for Opel Astra, Corsa and other general models. Clean threads and apply anti-seize; avoid cross-tightening; ensure wiring route avoids high heat.