BMW Wiring Harness | eBay BMW e30 325e e28 528e M20b27 engine wiring harness. Am very happy to provide lengths etc if required. Harness has 40 connections including single wire with no end. Wire has connector Amazon: bmw wiring harness Autostereo ISO Lead Wiring Loom Power Adaptor Wire Radio Connector for BMW 2000+ LAND ROVER 2001+ ROVER 2001+ MINI 2003+ Stereo Radio Receiver Replacement Wire Harness Cable. $5 $ 5. 88. FREE Shipping on orders over $25 shipped by Amazon. Only 2 left in stock - order soon.