Konnwei KDIAG Bluetooth diagnostic tool: full diagnostics and active tests on your smartphone
The Konnwei KDIAG Bluetooth diagnostic tool is a small OBD2 device that, once connected to your smartphone, offers features usually reserved for workshop diagnostic tools: full-system diagnostics, bi-directional control, ECU coding, and maintenance services. Konnwei, a brand known to car enthusiasts for its OBD2 readers, has packed the essentials into a pocket-sized format with a stable Bluetooth 5.0 connection.
One Konnwei device, one app, your entire car
Plug the KDIAG into the OBD2 port, connect the KDIAG app (available on the App Store and Google Play), and the scan begins. The control units scroll by: engine, transmission, ABS, airbags, power steering, electronic parking brake, instrument cluster, TPMS, and many more, depending on your car. For each, the codes, their definitions, and live data are accessible.
- Full-system diagnostics advertised for 31 car brands, including Audi, BMW, Mercedes, Volkswagen, Mini, Skoda, Seat, Ford, Toyota, Honda, and Lexus.
- Complete OBD2 functions for all compliant vehicles since 1996: codes, clearing, I/M, oxygen sensors, EVAP, and freeze frame.
- Bi-directional control: control windows, windshield wipers, locks, or engine monitor to test a component.
- ECU coding to adapt replaced components: power windows, lighting, sunroof, depending on the vehicle.
- Maintenance services: oil life reset, battery registration, electronic parking brake, DPF regeneration, steering angle calibration, TPMS.
- Bluetooth 5.0, free software updates advertised, interface in 7 languages, including French.
Konnwei KDIAG compared to other Bluetooth car diagnostic tools
A generic ELM327 adapter stops at the engine. A workshop tablet costs several hundred euros more. The KDIAG sits between the two: the diagnostic depth of a serious tool, without paying for a screen since you use your phone's. It is one of the most attractive solutions for anyone looking for a compact multi-brand car diagnostic tool, with the added bonus of firmware updates without using Bluetooth, directly from the app.
Connecting the Konnwei KDIAG without errors
Important point noted by the brand: do not pair the KDIAG from your phone's Bluetooth settings. Open the KDIAG app, tap the Bluetooth icon, and select the device from the list: the app manages the connection. Then, with the ignition on, start the diagnostic. The device measures only 7.1 x 4.8 x 2.4 cm and fits in its carrying pouch.
Is the KDIAG suitable for beginners?
Yes for reading codes and guided resets, which are done by following the on-screen instructions. The coding and bi-directional control functions, however, require knowing what you are changing: use them methodically, one step at a time. The exact coverage varies depending on the brand, model, and year: check your vehicle in the app.
Frequently asked questions about the Konnwei KDIAG
Does the Konnwei KDIAG work on iPhone?
Yes, the KDIAG app is available on iOS and Android.
Is the KDIAG in French?
Yes, the interface offers 7 languages: French, English, German, Italian, Spanish, Russian, and Polish.
Do you have to pay a subscription?
Software updates are advertised as free by the brand.
Can you perform an oil life reset with the KDIAG?
Yes, resetting the maintenance indicator is one of the services offered, depending on the vehicle.
Konnwei at Becquet Voiture: serious diagnostics in a pocket format
We selected the KDIAG for what it really brings: workshop functions accessible from a phone, in a device you can take anywhere. To maintain your car without depending on the garage for every warning light, it is a valuable ally.
Order your Konnwei KDIAG and keep an expert eye on your car.
Type: Bluetooth OBD2 diagnostic tool for smartphone
Brand: Konnwei
Model: KDIAG
Connection: Bluetooth 5.0
App: KDIAG, iOS and Android
Functions: full-system diagnostics, bi-directional control, ECU coding, maintenance services
Coverage: 31 brands with full diagnostics advertised, OBD2 on vehicles since 1996
Languages: French, English, German, Italian, Spanish, Russian, Polish
Dimensions: 7.1 x 4.8 x 2.4 cm
Contents: KDIAG device, carrying pouch, manual
Compatibility: depending on the model, to be checked in the app
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