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Mercedes,bmw,acura
2. As it`s a V8 it has 1 for every 4 cylinders.
Air/Fuel mixture too rich, cylinder misfire, or external damage to the converter.
It has two, left and right, near the exhaust manifolds (header)
There are four sensors, under car. 740i/iL has dual exhaust, 2 sensors per side, one in front of each catalytic converter and one behind. Sensors rarely go bad. Catalytic converters are sensitive to today's pourly refined gasoline and can burn out prematurely.
You bet, probably two.
Theres four o2 sensors in this particular bmw. Two before and two after the cat converters.
The O2 sensor is in the exhaust pipe before the catalytic converter.
check the catalytic converter. if the engine isisnt running hotter than normal it is most likely plugged exhaust somewhere likely in the catalytic converter
The rear oxygen sensors are located after the catalytic converter's Usually under the vehicles floorboard.
Almost directly under the ashtray if you where looking under your car, it has an o2 sensor in front and back of it on both sides
No, it is illegal to remove a converter and besides the engine will not run correctly with the converter removed.