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The Thinkcar Thinkdiag is a Bluetooth dongle for the OBD port. You operate it with the ThinkDiag app on your smartphone (iOS or Android). The device performs full system diagnostics on more than 115 car brands: fault codes, live data, actuator tests and ECU coding.
In addition, the Thinkdiag offers more than 15 service functions, such as oil reset, EPB, DPF, SAS, BMS and injector coding, and key functions (IMMO). With AutoVIN, the app recognises the car. When purchased through AsTools, you receive 1 year of software updates.
PROS
✔All systems — Engine, transmission, ABS, airbag, BCM, TPMS and more.
✔Actuator tests — Control components from the app.
✔ECU coding and IMMO — Adapt components and program keys.
✔Compact — Dongle plugs into the OBD port, operated via your phone.
POINTS TO NOTE
✕Smartphone required — No built-in screen; you work with the app on iOS or Android.
✕Updates after 1 year are chargeable — After that, you extend brand software via ThinkStore in the app.
✕Limited ECU coding — According to Thinkcar, coding does not work on all modules.
✕Coverage varies by model — Functions vary by make, model and year of manufacture.
Applications and functionality
The Thinkdiag is intended for DIY enthusiasts and small workshops that want to carry out extensive diagnostics without a tablet. Below is what the device can do.
Diagnostic functions
AutoVIN: Identifies the car via the chassis number.
Fault codes: Read and clear in all systems.
Live data: Values in text and graph form.
Actuator tests: For example windows, doors or fuel pump.
ECU information: Read data from the control units.
Coding
ECU coding: Adapt replacement parts to the ECU.
Hidden functions: Including on BMW, GM and Mercedes-Benz.
Adjustments: Carry out adaptations of modules.
App
Diagnostic report: Save and share digitally.
ThinkStore: Manage brand and reset software in the app.
How to use it
Install the app: Download the ThinkDiag app and create an account.
Activation: Enter the activation code under Personal Center.
Connect: Plug the dongle into the OBD port and switch the ignition on.
Pair: Connect the app via Bluetooth and let AutoVIN recognise the car.
Diagnostics: Scan the systems, read the codes and carry out the function.
Service and maintenance functions
The Thinkdiag has more than 15 service functions. Which function works on which model varies by make, model and year of manufacture.
Engine and transmission
Oil reset: Resets the service interval.
Injector coding: Writes the code of new injectors to the ECU.
Throttle valve: Re-learn the throttle body after cleaning or replacement.
Gearbox: Re-learn the automatic gearbox after maintenance.
DPF: Start a regeneration and reset values.
EGR: Perform EGR valve learning after cleaning or replacement.
Brakes and chassis
EPB: Release the parking brake for brake work.
ABS bleeding: Remove air from the ABS system.
Steering angle sensor (SAS): Calibrate the sensor, including for ESP.
Air suspension: Readjust the height sensors.
TPMS: Reset the system after a sensor or tyre change.
Electrical system
Battery registration (BMS): Register a new battery.
Adaptive headlights (AFS): Readjust the headlights.
IMMO: Teach in keys and remote control.
Comfort
Sunroof: Initialise the sunroof.
Seats: Calibrate the seats.
Supported vehicle brands
What matters is the combination of brand, model and year of manufacture, not the brand alone. Check in the app beforehand whether your model and the desired function are included.
Brands for diagnostics
Thinkcar lists more than 115 brands; these are the most important ones.
Thinkcar updates vehicle coverage through software updates.
Licence information
When purchasing via AsTools, you receive 1 year of software updates.
Activation: Register in the ThinkDiag app and enter the activation code.
First year: Brand software and updates at no extra cost.
After 1 year: Extend brand and reset software annually in the app.
Extension: Via ThinkStore, per brand or as a full package.
Package contents
1x Thinkcar Thinkdiag dongle
1x Quick start guide
💡
Good to know: The dongle is quite large. If the OBD port is deep or cramped, use an OBD extension cable. The app is designed for smartphones; according to Thinkcar, it may not work properly on a tablet.
Technical specifications
General
The manufacturer of the diagnostic device. Useful if you already know which brand works well in your workshop.Brand
Thinkcar
Whether it is a tablet, a standalone handheld unit, a dongle with an app, or an interface for a PC.Type of device
Dongle with app
Which types of vehicles or machines the device supports. An engine tester, for example, will not work on a truck.Vehicle types
Cars
Vans
How many vehicle brands the device can read. The more brands, the more often it can be used in a workshop with a wide range of vehicles.Number of brands
115+ brands
Which parts of the world the supported brands come from. This shows whether American or Chinese vehicles are also covered.Brand origin
European brands
Asian brands
American brands
Chinese brands
The car brands named in the description. The device may support more brands; coverage varies by model and year.Supported brands
The device shows sensor readings while the engine is running. This lets you check whether a component is working correctly.Live data
Yes
The device can operate components directly, such as a fan or valve. This allows you to test them without removal.Active tests
Yes
The device recognises the vehicle automatically by its chassis number, saving time searching through menus.Automatic vehicle recognition
Yes
Special functions
Adjusting control unit settings, for example after replacing a component. Required for more than just reading data.ECU coding
Yes
Linking new or additional keys to the vehicle. Useful when a customer has lost a key.Key programming (IMMO)
Yes
Service and maintenance
Resetting the service light and maintenance interval after an oil change. One of the most commonly used functions in a workshop.Oil reset
Yes
Putting the electric handbrake into maintenance mode, for example to replace brake pads.Electronic parking brake (EPB)
Yes
Recalibrating the steering angle sensor after wheel alignment or steering work. Important for ESP and driver assistance systems.Steering angle sensor (SAS)
Yes
Registering a new battery with the vehicle so it charges correctly and lasts longer.Battery registration (BMS)
Yes
Burning off a blocked diesel particulate filter. Often avoids the cost of a new filter.DPF regeneration
Yes
Entering the code of new injectors into the engine control unit so the engine runs correctly after replacement.Injector coding
Yes
Removing air from the ABS braking system after brake work, so the brake feels correct again.ABS bleeding
Yes
Resetting the tyre pressure monitoring system or relearning sensors after a tyre change.Tyre pressure reset (TPMS)
Yes
Recalibrating ride height on a vehicle with air suspension after repair.Air suspension calibration
Yes
Hardware
Whether the device connects wirelessly via Bluetooth, to the vehicle or to your phone, allowing you to move freely without a cable.Bluetooth
Yes
Licence
How long you receive free new software and vehicle coverage. After this, updates often require payment.Free updates
1 year
Other specifications
Vehicle type
Car and van
Connection
Bluetooth 5.0
Control
ThinkDiag app on iOS or Android
Power supply
Via OBD port, 9 to 18 V
Brands
More than 115
Service functions
More than 15
Reviews
4.6★★★★★9 reviews
5 ★8
4 ★0
3 ★0
2 ★0
1 ★1
★★★★★Dave O.
Disappointing
Disappointing, had hoped for more
Vindt het tegen vallen
Vindt het tegen vallen, had meer van gehoopt
★★★★★Maxim S.
Fast
Fast delivery
Быстрая
Быстрая доставка
★★★★★Josly B.
ok
ok
ok
ok
★★★★★Adnan T.
Good
Good
Goed
Goed
★★★★★CristianVerified buyer
Is an easy product and works great
Arrived quickly
Is een makkelijk product en werkt top
Was snel binnen
★★★★★NECDETVerified buyer
Super fast
Super snel
★★★★★KoosVerified buyer
Smooth delivery
Vlotte levering
★★★★★HansVerified buyer
super fast good service with a quickly responding backup.
super snelle goeie service met een snel reagerende backup.
★★★★★JcVerified buyer
Super thing after some explanation on how to use it