How many oxigen sensor does mitsubishi montero sport have?

Question edited for clarity.
Question moved from Misc to model category.

https://www.justanswer.com/mitsubishi/9nxqo-mitsubishi-montero-xls-crank-sensor-located.html

Just close the chat box on the right.

https://www.google.com/search?q=2001+mitsubishi+montero+sport+crankshaft+sensor+location

MR988905 costs $300+

SNG O2 sensor is just below $100

they may claim being made with the same quality and both are tagged "direct fit" for easy installation.

its just my idea, good luck.

Question edited for clarity

Not easy to get to or change according to this.

https://www.justanswer.com/mitsubishi/5693h-crankshaft-position-sensor-located-2003-montero-is-diagram.html

More
https://www.google.com/search?q=2002+montero+sport+xls+2wd+3.5+v6+crankshaft+sensor+location

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On the side of transmission

Range Sensor/Gear Selector/shift lever

Well, for starters they should have never told you to change the oxygen sensors. The codes they pull are only a guide and it is up tp a tech to find the underlying problem. It sounds like you have a catalytic convertor issue.

The oxygen sensors, or O2 sensors, on a Mitsubishi Montero Sport are located under the vehicle. Models made prior to 1996 had only one sensor which was located on the catalytic converter, behind the exhaust manifold. Newer models have additional sensors located on the left and right sides of the manifold.

possible it could be coolant temp sensor it could think its warm and not supplying enough fuel check eng light on?

replace the o2 sensor the one before the cat converter with a quailty sensor like a denso brand o2 sensor

Check the wires from the electronic sensor on the tailshaft of the gearbox, These sensors are usually the problem, broken wire, blown sender, sheered gear.

possible bad speed sensor, get computer codes