MoparPartsGiant.com offers the wholesale prices for genuine 2012 Dodge Avenger parts. Parts like Suspension - Rear are shipped directly from authorized Mopar dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 4 Cyl 2.4L, 6 Cyl 3.6L. Transmission: 4-Speed Automatic Transmission, 6-Speed Automatic Transmission.