Konnwei Kdiag is a professional automotive diagnostic scanner compatible with Android and iOS devices and operating via the OBDII protocol. The device comes with a lifetime license and regular updates, making it a cost-effective long-term solution for vehicle diagnostics.
The scanner supports full diagnostics for 31 car brands manufactured after 1996, including:
- German brands: Audi, BMW, Mercedes-Benz, Volkswagen, Seat, Skoda, Opel.
- Japanese and Asian brands: Honda, Acura, Nissan, Infiniti, Lexus, Toyota, Mazda.
- American brands: Ford, GM, Chevrolet, Buick, Cadillac, GMC, Pontiac, Saturn, Hummer, Holden, Lincoln, Mercury.
- Premium brands: Lamborghini, Mini, Rolls-Royce, Maybach, Bentley, Bugatti.
The application interface is available in 8 languages: English, Russian, French, Spanish, Dutch, Italian, Polish, and Chinese.
Konnwei Kdiag is equipped with advanced functions for working with vehicle electronic systems:
- Reset and restore data for ECM, BCM, SRS, TCM, BMS, TPMS, SAS, and air conditioning system modules.
- Service functions: oil service interval reset, EPB (Electric Parking Brake) code clear, TPS replacement code reset, battery replacement, DPF (Diesel Particulate Filter) regeneration, injector coding, headlight level adjustment.
- Automatic vehicle identification via VIN (Auto-VIN function).
- Full diagnostic report generation with sharing capability.
- Real-time data streaming with graphing and parameter logging.


The device uses Bluetooth 5.2 for fast and stable connection, which is superior to adapters based on older Bluetooth versions or Wi-Fi. The Kdiag application is provided free of charge and regularly updated, offering an intuitive interface and advanced features without additional setup requirements.
Konnwei Kdiag outperforms popular ELM327-based adapters in all key parameters:
| Feature | Konnwei Kdiag | ELM327 Adapter |
|---|---|---|
| Functionality | Complete diagnostics of all vehicle systems (engine, ABS, SRS, transmission, TPMS, etc.) | Limited engine diagnostics only via OBD-II protocol |
| Diagnostic Functions | Read/clear errors, service functions, actuator tests | Only reading and clearing basic engine error codes |
| Connection | Bluetooth 5.2 - fast and stable | Outdated Bluetooth versions or Wi-Fi, possible dropouts |
| Software | Free proprietary Kdiag app with graphs and reports | Requires third-party apps (Torque, Car Scanner) |
| Diagnostic Reports | Automatic generation of complete reports | Basic reports only via third-party apps |
| Updates | Lifetime free updates | Depends on app and manufacturer |
| Vehicle Identification | Automatic via VIN (Auto-VIN) | Usually not available |
| Ease of Use | Intuitive interface, no additional setup needed | Requires app selection and configuration |
| Target Audience | Car enthusiasts, mechanics needing deep diagnostics | For basic engine monitoring and error clearing |
The scanner enables comprehensive diagnostics of all vehicle systems:
- Engine and transmission - real-time parameter reading, error codes, system testing.
- ABS and stability control - sensor diagnostics, modulator testing, error reset.
- Airbags (SRS) - sensor and module checks, error reset after repairs.
- Electric Parking Brake (EPB) - service mode activation, error clearing.
- Air conditioning system - sensor diagnostics, compressor checks, flap control.
- Diesel Particulate Filter (DPF) - forced regeneration, service interval reset.
- Parking assistance system - sensor calibration, module diagnostics.
To connect, launch the Kdiag application and perform pairing through it. Attempts to connect via the device's standard Bluetooth menu will not succeed - the scanner is recognized only through the proprietary application.
Konnwei Kdiag is a professional tool that turns your smartphone or tablet into a powerful diagnostic station. With it, you can not only find faults but also perform service functions typically available only on dealer equipment.
Main advantages of Konnwei Kdiag:
- Lifetime license and free updates.
- Support for over 31 car brands.
- Multilingual interface (8 languages).
- Bluetooth 5.2 for reliable connection.
- Automatic vehicle identification via VIN.
- Complete diagnostics of all systems (not just engine).
- Service functions: oil reset, EPB, DPF, injector coding.
- Detailed diagnostic report generation.
This device is ideal for both car enthusiasts wanting to maintain their vehicles independently and professional mechanics needing a reliable, functional diagnostic tool.
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★★★★★
I used Ediag with the Kdiag interface.
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★★★★★
Мой старый диагностический адаптер начал часто терять связь. Решил заменить на этот. Подключился к Тойоте, прочитал и стер ошибки двигателя. Связь стабильная, приложение работает отлично.
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★★★★★
Старый сканер перестал работать после падения. Взял этот — подключился к моему Ford Focus, ошибки читает, сброс ABS прошел отлично.
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★★★★★
Нужно было каждый месяц сбрасывать ошибки по АБС на Мерседесе. Купил этот сканер — справляется на ура. За эти деньги лучше не найти.
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★★★★★
Сравнение в пользу этого: связь стабильнее, приложение новее. На Opel Astra всё проверил — ошибки читаются чётко.
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★★★★★
Сканер прост в настройке, приложение на русском, всё интуитивно. Сбросил ошибку ABS на своей Шкоде.
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★★★★★
Взял второй такой же сканер в качестве запасного. Работает так же надежно, как и первый.
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★★★★★
Gribēju vienkāršu rīku, lai pašam pārbaudītu auto pirms garākiem braucieniem. Šis darbojas nevainojami ar manu VW Passat. Ātri pieslēdzas, rāda kļūdas un ļauj tās dzēst. Esmu ļoti apmierināts.
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★★★★★
Sākumā bija tikai priekš BMW, bet tagad palīdzu draugiem ar Toyota un Ford. Licences atjauninājumi ir bez maksas.
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★★★★★
Pirmo reizi iegādājos diagnostikas skeneri. Uzinstalēju aplikāciju, savienoju ar Bluetooth — uzreiz atpazina manu VW Golf.