NissanPartsDeal.com offers the wholesale prices for genuine 1989 Nissan Hardbody Pickup (D21) parts. Parts like Secondary Air System are shipped directly from authorized Nissan dealers and backed by the manufacturer's warranty. Parts fit for the following vehicle options. Engine: 4 Cyl 2.4L, 4 Cyl 2.5L Diesel, 6 Cyl 3.0L. Trim: Basic, DX, GST, SST, ST, STD.