OBDEleven: Advanced Car Customization & Diagnostics Made Easy! The OBDeleven NextGen device is a compact, Bluetooth-enabled tool that connects your smartphone to your car, unlocking powerful customization, diagnostics, and coding features, all in a simple, user-friendly app. Whether you’re a car enthusiast, a DIYer, or a workshop technician, OBDeleven offers professional-grade features with everyday ease of use.