MINI 11787548961 Oxygen Sensor Downstream

Genuine MINI oxygen sensor part number 11787548961 (11-78-7-548-961) functions as downstream lambda monitor sensor positioned after catalytic converter. Sensor utilizes zirconia dioxide sensing element with integrated heater circuit for rapid closed-loop operation. Wire harness length 475mm with OE-spec connector ensuring direct plug compatibility. Thread specification M18 x 1.5 standard exhaust mounting. Operating temperature range up to 900°C exhaust gas temperature. Signal output 0.1-0.9V switching range for stoichiometric lambda control. Designed for Euro 5/6 emissions compliance on BMW Prince engine family. Cross-reference interchange includes NGK 25198, NTK 12598, Denso 234-4488, Walker 250-24546, Bosch 1618V3, and PSA 9636968380. Manufactured by NTK (NGK Spark Plug Co.) as original equipment supplier for BMW Group. Sensor housing stainless steel construction with ceramic insulator and protective shield. Heater resistance 8-10 ohms at 20°C. Response time <100ms at 350°C. Service life design target 160,000 km under normal operating conditions.