Land Rover Range Rover Front Oxygen Sensor MHK501140 Replacement 234-9074 OEM Specification

This replacement uses the same zirconia sensor element and high-temperature stainless steel housing as OEM, with welding process rigor; durable under high exhaust temperature fluctuations in Land Rover Range Rover models. OEM number MHK501140; can replace Delphi 234-9074; fits Range Rover L322, L405 and Sport L494 with 3.0L/5.0L gasoline engines. Function is to monitor exhaust oxygen content and feed ECU with air-fuel ratio signals to ensure combustion efficiency and catalytic converter life. Replacement difficulty moderate; remove front exhaust pipe shield; use dedicated socket to unscrew old sensor; avoid thread stripping or harness pulling.