Product Overview The Mass Air Flow (MAF) Sensor C2Z18798 is a genuine OE-grade engine management component for for Jaguar XF (X250) and XJ (X351) models equipped with the 2.2L diesel (224DT) and 2.0L GTDI petrol engines. Installed in the intake tract after the air filter, it measures the volume and density of incoming air and transmits this data to the Engine Control Unit (ECU) for precise air-fuel mixture calculation. LR029074 is the Land Rover equivalent part number for the