GAP IIDTool G4 BT

The GAP Diagnostic IIDTool G4 is arguably the Swiss Army knife of diagnostic tools for Land Rover enthusiasts and professionals alike. Designed with Land Rover and Range Rover platforms in mind, it offers a deep dive into vehicle systems via a simple OBD-II plug-in and a sleek mobile app interface. This isn’t just about reading and clearing fault codes—it lets you calibrate air suspension, enable or disable CCF (car configuration file) options, reset service indicators, and even program keys (license permitting).
You can a couple of blog posts I wrote on the subject like Infotainment Fiasco: How I Almost Missed My Scuba Trip and Unlocking Your Car's Secrets: Why You Really Need an OBD Scanner to get some real life examples.

The G4 variant, which includes Bluetooth and Wi-Fi capabilities, allows for seamless updates and remote support. The interface is intuitive for daily users yet powerful enough for seasoned techs. While it does come with a stern disclaimer—use it only if you know what you’re doing—it’s an essential bit of kit for any L319, L320, or L322 owner who wants full control of their rig without running to the dealership. In short: if you own a Disco and don’t have one, are you even trying? .