"Get Connected" with Our Range of Cables, Leads & Adaptors!After selecting your primary harness you then select a secondary harness to connect between the ISO connectors and the aftermarket head unit that you have ( this is selected based on what brand and type of head unit you have. We carry both non steering wheel control type primary harnesses and steering wheel control type.ISO connector to suit most BMW models with round pin plug type.Features: No need to cut your car's factory harness / true plug-n-play with Aerpro secondary ISO harnesses Converts factory wiring to universal ISO plugs Makes for easy D.I.Y. installation ISO connector to suit most BMW models with round pin plug type Easy plug and play solution Vehicles Known to Work with this Product: BMW 3 Series 1998-2005 E46 BMW 5 Series 1996-2004 E39 BMW 3 Series 1990-1999 E36 Legendary Products & Support From Authorized Dealers When you choose Aerpro, you're choosing quality and performance. But just as important as what you buy is where you buy it from. Here's why purchasing from an authorized dealer is always the right choice: ▸ Expert Knowledge & Training Only authorized Aerpro dealers are factory-trained to sell and install our products. They have the expertise to ensure your purchase is set up correctly and meets your expectations. ▸ Authorized Warranty Protection: We offer one of the best warranties in the industry, but only purchases made through authorized dealers are covered. Don't be misled by unauthorized sellers who can't provide genuine warranty support. ▸ Reliable Customer Support: If you ever run into an issue, you're backed by Aerpro's official manufacturer's warranty. No need to deal with overseas returns—our local team takes care of everything quickly and efficiently. ▸ Protect Your Investment: Buying from an authorized dealer ensures you're getting genuine products, full warranty coverage, and expert support. Ask yourself—is saving a few dollars worth losing all that? Choose wisely. Buy from an authorized Aerpro dealer today!