FordPartsGiant.com offers the wholesale prices for genuine 2021 Ford Mustang parts. Parts like Switches & Sensors are shipped directly from authorized Ford dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 4 Cyl 2.3 L GAS, 8 Cyl 5.0 L GAS, 8 Cyl 5.2 L GAS.