How many oxgen sensors does a 2004 Hyundai Santa Fe 2.7 2wheel drive vehicle have and where are they located? What idoes Bank 2 Sensor 1, Bank 1 Sensor 2, Bank 1 Sensor 1, and Bank 2 Sensor 2 mean?

There is normally only one crankshaft sensor, maybe 2 camshaft sensors, one for each bank, and there are two O2 sensors for each bank.

https://www.google.com/search?q=2009+Hyundai+Santa+Fe%2C+2.7%2C+6+cylinder.+Where+is+the+location+of+the+crankshaft+bank+1+sensor+A

Crankshaft Position Sensor, only one

https://www.google.com/search?q=2009+hyundai+santa+fe+crankshaft+position+sensor+location

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Usually these are located on the exhaust manifold or just below the exhaust manifold and you should be able to see it in the engine bay. On V6 engines there will be one sensor on each of the 2 exhaust banks.
You will probably need to remove the engine cover to see the sensors on your exhaust.

If someone told you to replace these because you got a particular fault code I would be wary. A decent scan tool and basic diagnostics can show if the 02 sensor is working or not. Some faults often blamed on an 02 sensor are not due to faulty sensors.

The speed sensor for the transmission is in the side of the trans.
You can look up the part on one of the auto parts store's websites for a visual.

Bank one is the first oxygen sensor in line from the engine back. Bank 2 is the second in line.

the o2 sensor [bank 1 sensor 2] is located after ur catalytic converter jack up and support truck follow the exhaust pipe u will see after the converter mounted in exhaust tube towards top a wire and sensor thats ur o2 sensor disconnect wire and unscrew sensor and replace -also check wiring and connection for damage ---it is an emission sensor will usually cause vehicle to fail an inspection can cause problems with fuel consumption[run rich]

replace the 02 upstream sensor... best solution

Heated Oxygen Sensor (H02S)

The sensors are located in the exhaust system. On some vehicles, one sensor is located up at the exhaust manifold(s) and the other sensor is located down at the catalytic converter. On other vehicles, both sensors are located down at the catalytic converter.

If it is the 2.4 (4cyl) or 3.5 (6cyl) it is behind the timing belt. If it is a 2.7 (6cyl) it is located on the engine near the bellhousing, bank two side (side facing radiator)

If your vehicle has a V-6 then it would be the first o2 sensor on the exhaust coming of the front of the engine.If it is a 4-cylinder. then it will be the first o2 sensor coming of of the engine.

Heated Oxygen Sensor The sensors are located in the exhaust system. On some vehicles, one sensor is located up at the exhaust manifold(s) and the other sensor is located down at the catalytic converter. On other vehicles, both sensors are located down at the catalytic converter.


This is the upstream sensor




This is the down stream sensor