BMW M135i Oxygen sensor 11787645875 specially designed for turbocharged engines

Oxygen sensor designed for BMW M135i and B48-turbo engines; part number 11787645875. Stainless steel housing with ceramic sensing element; can withstand high-temperature exhaust from turbocharged engines; bench testing shows durability approaching factory standards. Installed on the exhaust pipe to feed oxygen content signals back to the ECU to adjust the air-fuel ratio; replacement requires removing underbody shield, careful handling of threads, and torque control; use a dedicated socket.