Bosch 13539 Oxygen Sensor, OE Fitment (Acura, Honda, Isuzu) Ceramic element with integrated heater requires less power to activate, and reaches operating temperature more quickly than a thimble element Improved protection tube provides increased thermal resistance for long life Laser weld and Viton sealing system is totally submersible to seal tight and protect against contamination for long life Coated threads for easy installation