What's the 2011 Ford Edge o2 sensor location?

There are four O2 sensors on Your 2011 Ford Edge: one on each side just below the exhaust manifold, and one on each side behind the second catalytic converters (which themselves are somewhat aligned to the back of the front doors). To orient which sensor is failing, bank one is going to be on the same side as the spark plug one, which is typically the driver's side. The second ones are aft the catalytic converter. MoSTSensors last for 100k miles, so if it's significantly before that, and You're getting a code thrown that it's bad, do consider there could be other reasons for it. If You take it into a shop, You can expect to pay anywhere from a couple hundred to three hundred for labor and parts. If You buy and install the sensor Yourself, though, You can usually find a new one, like the BOSCH15383 Oxygen Sensor for around $32, not including shipping and tax.