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Quick specs
| Price | $159 sale, $189 regular |
|---|---|
| Format | Bluetooth OBD2 dongle with iOS and Android app |
| Protocols | CAN-FD plus SAE J1850, ISO14230-4, ISO15765 |
| Service functions | 15 standard maintenance resets |
| Advanced functions | Bi-directional tests, ECU coding, IMMO key matching, Auto VIN |
| Software | 1 year free full software after activation |
| Languages | 15+ |
| Warranty and returns | 1-year warranty, 30-day returns |
How we researched
This review is based on THINKCAR THINKDIAG 2's official product page, its published specifications and pricing, and a comparison with leading alternatives in automotive. We have not used this product ourselves; scores reflect how it compares on paper.What the THINKDIAG 2 is
The THINKDIAG 2 is a small OBD2 dongle that plugs into your car's diagnostic port and talks to the ThinkDiag app on an iPhone or Android phone over Bluetooth. THINKCAR pitches it at individual owners, DIYers and small repair shops.
It is the upgraded version of the original ThinkDiag. THINKCAR says the main difference is built-in CAN-FD protocol support, which it claims makes this the only product in its price range compatible with CAN-FD and able to work with the latest GM vehicles built after 2020.
THINKCAR claims coverage of 98% of car models on the market, but its own page notes that available functions differ by vehicle and recommends a VIN check with support before buying.
Key features
Beyond basic code reading, THINKCAR says the THINKDIAG 2 does OE-level diagnostics across systems such as ABS, SRS, engine, transmission, TPMS, body, AWD, battery, ESP and instrument cluster. It also lists all 10 standard OBD2 modes, including freeze frame, O2 sensor and EVAP tests, I/M readiness and clearing the check-engine light.
The higher-end features are what set it apart from basic readers. The brand lists bi-directional active tests (for example, turning on the radiator fan, cycling windows or locks, or modulating the throttle), ECU coding for items like lighting, power windows and display settings, and immobilizer functions such as key learning and remote programming.
There is a separate menu of 15 maintenance functions, including oil reset, EPB and brake reset, steering angle reset, battery matching, DPF-style regeneration, ABS bleeding, injector coding, throttle relearn and TPMS reset. The app also offers live data graphs with up to four values, an Auto VIN scan, remote diagnosis and shareable or printable health reports.
Setup and everyday use
Setup, as THINKCAR describes it, is short: download the ThinkDiag app, register, activate the dongle using the serial number on the back and a password from the manual, download the vehicle software, then plug in and let it read the VIN.
Activation matters. THINKCAR says you must activate the dongle to get one year of free full software and functions. The page does not state what happens after that year or what renewal costs, so ask before buying if you plan to use it long-term.
Because the interface is your phone, there is no separate screen or battery to manage. The trade-off is that the experience depends on your phone and the app rather than on dedicated hardware.
Compatibility caveats and buyer feedback
The product page shows 490 reviews, with most rated five stars. The critical reviews shown are worth reading before you buy, because they focus on coverage rather than build.
One buyer reported that key programming on a 2013 Jaguar XF failed with an error and incorrect key counts, and said support did not resolve it. Another buyer who upgraded from the original ThinkDiag said some functions, including ELV-related ones, were no longer available, and that no list of removed functions was published.
The takeaway is simple: use the coverage checker on the product page or send your VIN to support and confirm the exact function you need, especially for key programming or coding, before you order.
Price and value
At a $159 sale price (regular $189), the THINKDIAG 2 costs far less than most tablet scanners that advertise bi-directional control and coding. If those functions work on your car, the hardware price is reasonable.
The open question is ongoing cost. The page promises one year of free full software, and nothing about pricing after that. Factor in a possible renewal when comparing it with tools that include lifetime updates.
THINKCAR backs it with a 1-year warranty, 30-day returns and what it calls lifetime support, and says orders ship from a US warehouse, usually within one business day. The 30-day return window is your chance to confirm it handles your car.
How it scored
Alternatives
| Product | Best for | |
|---|---|---|
| THINKCAR THINKDIAG 2This review | DIY owners and small shops who want bi-directional tests, resets and coding through a phone without paying for a tablet scanner. | Check price |
| BlueDriver Pro | Simple phone-based code reading | |
| Autel MaxiCOM MK808 | Buyers wanting a dedicated tablet | |
| Launch X431 series | Shops needing deeper pro coverage |
FAQ
Does the THINKDIAG 2 work with iPhone?
Yes. THINKCAR says the ThinkDiag app is available on the Apple App Store as well as Google Play, and the dongle connects over Bluetooth.
Is there a subscription after the first year?
THINKCAR says activating the dongle gives one year of free full software and functions. The product page does not list renewal pricing or what remains usable afterward, so confirm with THINKCAR before buying.
What is the difference between ThinkDiag and ThinkDiag 2?
THINKCAR says the main difference is built-in CAN-FD support, which it says is needed for GM vehicles built after 2020. At least one buyer reported that some original ThinkDiag functions, including ELV-related ones, are not available on the ThinkDiag 2.
Can the THINKDIAG 2 program car keys?
THINKCAR lists immobilizer functions such as key learning and remote programming, but support depends on the vehicle. One buyer reported failed key programming on a 2013 Jaguar XF, so check your VIN with support first.
Is the THINKDIAG 2 a bi-directional scan tool?
THINKCAR says it supports active tests such as turning on the radiator fan, operating windows and mirrors, and testing door locks. The coverage checker shows whether actuation tests are available for a specific vehicle.
Will it work on my car?
THINKCAR claims coverage of 98% of models, but functions vary by trim, ECU and region. Use the coverage tool on the product page or send your VIN and the needed function to support for a manual check.
Final verdict
The THINKDIAG 2 is a strong fit for DIYers who want bi-directional tests, resets and some coding from their phone at a modest hardware price. Confirm your vehicle's exact functions with THINKCAR first, and ask about post-first-year software costs, so the low entry price does not turn into a surprise.
