BMW 3 Series O2 Lambda Sensor Failure P0136
BMW
3 Series
2005
N52 Petrol
Safe to Drive?
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Urgency Level
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P0136 downstream O2 sensor circuit malfunction on BMW 3 Series N52 indicates failed lambda sensor. The downstream sensor monitors catalyst efficiency. Replacement costs £80-200. Ensure the replacement sensor is the correct variant — wideband vs narrowband sensors are not interchangeable.
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