AcuraPartsWarehouse.com offers the wholesale prices for genuine 2018 Acura MDX parts. Parts like Trailer Hitch - Wire Harness - Ball - Locking Pin are shipped directly from authorized Acura dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Body & Trim: 5 Door TECH (SH-AWD). Emission & Transmission: KA 9AT.