7-Series (V12)
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Bosch LSH 25 oxygen sensors produce a low voltage (0-1000 mV) proportional to the oxygen content exiting the catalytic converters. If exhaust has a lower oxygen content (rich mixture), there will be a large ion migration through the sensor, generating a higher voltage (950 mV). If the exhaust has a higher oxygen content (lean mixture), there will be a small ion migration through the sensor, generating a lower voltage (080 mV).