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Ferret

E46 O2 Lambda Sensors - Which is which?

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Which sensor is on which bank?

Bank 1, Sensor 1: Before the catalytic converter.
Bank 1, Sensor 2: After the catalytic converter.
Bank 2, Sensor 1: Before the catalytic converter.
Bank 2, Sensor 2: After the catalytic converter.

BMW E46 330Ci O2 Oxygen Lambda Locations:
 

Bank-Sensor Numbers for Lambdas.png

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