1989 Nissan 240SX Wiring - Nissan Parts Deal NissanPartsDeal offers the lowest prices for genuine 1989 Nissan 240SX parts. Parts like Wiring 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. 1989 Nissan 240SX OE Wiring Harnesses & Stereo Adapters Nissan 240SX 1989, Factory Replacement Wiring Harness by Metra®, with OEM Radio Plug. For factory stereo. This high-quality Metra wiring harness is just what you need to replace your defective or aged factory wiring harness.