For Buick, Oxygen Sensor 13444/234-4087, 21528, ES20002,

Part Number: 12578459, 12587214 Models: 234-4087, 21528, ES20002, SG277, AFS97, AFS123,12 Measuring range: 12578459, 12587214 Scope of application: bosch 13444/ Measurement accuracy: 12578459, 12587214 ------------------------------------------------------------------------------------------------------- Direct Plug-In Replacement Wires: 4 Length (Sensor to Lead): 17.7 inch 450 mm Interchange #:234-4087, 21528, ES20002, SG277, AFS97, AFS123, 12578459, 12587214 Function: Oxygen sensor is a key part to reduce the harmful emission and the increase the fuel efficiency. Material:The Apeixoto oxygen sensor is wrapped with two layers.