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These kits from Caspers Electronics allow a new-style heated oxygen sensor to be installed on a vehicle that originally came with a non-heated, one-wire sensor. The heated oxygen sensors are more active and responsive than non-heated sensors and are also more resistant to contaminants such as lead. They are a great choice when replacing factory non-heated O2 sensors. The kits feature a simple 2-wire installation and come complete with a 4-wire heated oxygen sensor and adapter harness.