FordPartsGiant.com offers the wholesale prices for genuine 2003 Ford Ranger parts. Parts like Exhaust Gas Oxygen (Hego) & Catalyst Temp. Monitor (Ctm) Sensors are shipped directly from authorized Ford dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 6 Cyl 3.0L. Transmission: 5AT 5R55E.