On a 4 cylinder Toyota Camry, 1996, there are two oxygen sensors. Its all Depending on your engine size and cylinders. If your not sure how many your car has, go to your local autozone or Schucks...
If it's a 6 cylinder there will be two banks, left and right or 1 and 2 as they're calling them, then there will be a front and a rear sensor, or sensors 1 and 2. If it's a 4 cylinder there will only...