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This lambda sensor measures oxygen levels in the exhaust gases to optimize the air-fuel mixture for engine efficiency and emission control on the BMW E46 318i with M43 B19 petrol engine. Removed from a donor vehicle, it shows visible wear and dirt. Match the OEM codes (0258005271, 185261121) against your original unit before ordering, as fitment varies across E46 models and engine variants.
This lambda sensor measures oxygen levels in the exhaust gases to optimize the air-fuel mixture for engine efficiency and emission control on the BMW E46 318i with M43 B19 petrol engine. Removed from a donor vehicle, it shows visible wear and dirt. Match the OEM codes (0258005271, 185261121) against your original unit before ordering, as fitment varies across E46 models and engine variants.
