Bosch Universal Heated Oxygen Sensors Revolutionary New Patented Connection System   The submersible Bosch patented connection system has undergone rigorous quality testing to USCAR standards. Tests have proven that this watertight system protects against contamination and withstands the temperatures and engine vibration.     An OEM-Specific Universal Program While universal sensors allow coverage of manu OEM applications with only a few part numbers, some competitor programs take this concept too far. OEM sensor applications require a variety of ceramic elements and other design variations to meet specific OEM operating requirements. Bosch offers 5 different 4-wire sensors and 2 different 3-wire sensors to provide the closest match to OEM sensor performance.   Easy Installation User-friendly instructions. No special tools required. Posi-Lock connectors can be unscrewed and reconnected in case of a wring mistake. Includes a two-foot length of sensor wire to allow maximum replacement of worn wire from the OEM sensor being replaced.       A worn-out oxygen sensor: Replacing a worning oxygen sensor:   Wastes Fuel Saves money in fuel costs Can cause engine performance problems, such as surging and hesitating Improves engine performance Is the number one cause of excessive harmful exhaust emissions Reduces air pollution Accelerates catalytic converter damage Prevents premature failure of the catalytic converter   What is an oxygen sensor? An oxygen sensor senses the amount of oxygen in the exhausr gases and send a signal to the engine computer, whic asjusts the air/fuel mixture to the optimal level.   Too much oxygen in the exhaust gases indicates a lean mixture, which can cause performance problems, including misfire. Too litte oxygen indicates a rich mixture, which wastes fuel and results in excess emissions. Either condition can shorten the life of the catalytic converter.   Almost all gasoline ppowered vehicles newer than 1986 have at least one oxygen sensor, and 1996 and newer vehicles have at least two oxygen sensors.   Not only are properly functioning oxygen sensors good for the environment, but they can save money in fuel costs, too.   Worn out Oxygen Sensor New Oxygen Sensor  Miles Driven 12,000  12,000 Miles/Gallon  18.0  20.0 Gallons of Gas 666.7 600.0  Cost/Gallon  $1.30  $1.30  Total gasoline cost $867  $780  SAVINGS PER YEAR   $87  After 30,000 - 50,000 miles    $217 - $362  After 60,000 - 100,000 miles   $435 -$725     When to replace an oxygen sensor Exposure to carbon, soot, harmful gasses, antifreeze, chemicals, and thermal and physical shock will shorten the life of an oxygen sensor. This results in reduced gas mileage, poor engine performance, and/or emissions failure.   Most oxygen sensors wear out after 30,000 - 50,000 miles in use. Newer heated-type sensors with 3 or 4 wires wear out after 60,000 - 100,000 miles.   Since Bosch invented the automotive oxygen sensor in 1976, over 175 million sensors have been manufactured by Bosch. Bosch is the largest producer oxygen sensors. Virtually all the vehicle manufacturers in the world are supplied oxygen sensors by Bosch.