Bosch 16088 Oxygen Sensor, Original Equipment (Buick, Chevrolet, GMC, Saturn) Premium Bosch oxygen sensors are designed to improve fuel economy while reducing harmful emissions "True Direct-fit" OE connectors and harness Double laser-welded stainless steel body protects against contamination Pre-coated threads with anti-seize compound right out of the box Bosch invented the oxygen sensor and manufactures more oxygen sensors for the independent aftermarket than any other supplier. Bosch 16088 Oxygen Sensor, Pack of 1 Advanced Ceramic Technology Patented Platinum Power Grid Zirconium/Yttrium Ceramic Probe