Our tool supports most OBD2-compliant vehicles, one-click coding, full-system diagnostic and service support VAG, BMW Group and Mercedes-benz etc. You can check compatibility via HERE or by selecting your make and model in the DFirstCoder app.

No. The DFirstCoder app is easy to use for everyone and guides you step by step—simply plug in, connect, and follow the instructions.

You can access one-click coding & retrofit (subscription needed), full-system diagnostics, service resets, battery test, live data, and more.

The one-click coding feature lets you unlock and restore hidden functions and retrofit options with ease. All programming is automated—just a few taps to customize your car without any tedious steps.

It scans all available ECUs—including engine, transmission, ABS, airbag, BCM, and more—to show diagnoctis trouble codes(DTCs) and detailed reports.

Yes. You can export technician-ready PDF reports directly from the app.

You can choose A VIN subscription for a lifetime or unlimited VINs subscription for 12 months. For more details please check HERE

The QIXIN OBD device support protocols and usage are different, before using the QIXIN OBD device, please verify if it is compatible with your car or not. If you cannot be sure, please contact us at email: support@dfirstcoder.com

Yes, the DFirstCoder APP is free to download and update.

It is typically located beneath the steering wheel, underneath the driver's seat, above or next to the dashboard,in the center console section next to the driver's seat, or inside the vehicle's engine compartment, usually near theright side of the engine

Yes, if you have lost your device, please contact us at email: support@dfirstcoder.com to get help.

Please don't worry, there are usually temporary diagnostic trouble codes(DTCs), The result of partial ECU will be restart when execution, other ECU checked they were off，therewith generates DTCs, you can clear the DTCs by DFirstCoder app, or plug out the QIXIN OBD and start your car will disappear after finishing executions.
If ineffective after clearing DTCs, please contact us at email: support@dfirstcoder.com