InfinitiPartsDeal.com offers the wholesale prices for genuine 2019 Infiniti QX30 parts. Parts like Back Door Panel & Fitting are shipped directly from authorized Infiniti dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 4 Cyl 2.0L. Trim: Base, Comfort, Premium, Sport-Plus City Black, Xover-Cafe Teak.