Thinkcar Thinkdiag Bluetooth OBD2 Scanner with Bidirectional Tests

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Product guide

Thinkcar Thinkdiag Bluetooth OBD2 Scanner with Bidirectional Tests

Bidirectional: The thinkcar Thinkdiag Diagnostic Scanner is a Bluetooth OBD2 dongle that uses a phone app for diagnostics, live data, active tests and maintenance functions. Its broad claimed feature set makes vehicle and function compatibility, app activation and the one-year update period important to confirm before purchase.

At a glance

Uses the Thinkdiag+ app on a compatible Android or iOS phone and connects to the vehicle through Bluetooth.
Claims full-system code reading and clearing, live data, control-module information, maintenance functions and bidirectional active tests.
Lists 15+ reset, relearn or calibration functions, with availability varying by vehicle.
Auto-VIN is claimed, with manual vehicle selection offered if identification fails.

Price

$89.99Save 18%

Reference price: ~~$109.99~~

Price checked: Nov 14, 2026

View offer

Pros and cons

Pros

Phone-based design avoids a separate handheld display and provides live-data graphing and recording through the app.
The claimed combination of full-system diagnostics, active tests and maintenance procedures can suit owners who need more than basic engine-code reading.
The listing names common service tasks such as oil reset, ABS bleeding, battery registration and steering-angle calibration.

Cons

The scanner depends on a phone, the companion app, Bluetooth and successful activation, rather than operating as a standalone reader.
Potential feature activation and advanced ECU functions are listed as vehicle-dependent and are described as performing better on Android devices.

Technical specifications

14 specifications

Identity
Brand	thinkcar
Model	Thinkcar Thinkdiag Diagnostic Scanner

Display and video
Screen size	5 inches

Power and battery
Power configuration	Corded Electric

Dimensions and installation
Dimensions listed	3.15"L x 1.57"W x 4.72"H
Weight listed	0.15 g

Connectivity and compatibility
Phone operating systems	Android 6.0 to newer, iOS 13 to newer
Vehicle fit	Universal Fit
Claimed vehicle coverage	most car models after 1996
Claimed brand coverage	120+ car brands

Diagnostic functions
Claimed maintenance functions	15+ professional maintenance functions
Claimed active tests	10000+ active tests
Claimed update period	1 year update without any charge
Warranty description	1 year warranty

What to know before buying

Listing details to confirm

The listing describes the dongle as Bluetooth-connected to a phone but also gives a 5-inch screen size and calls the power source Corded Electric. Those details do not clearly describe the same device configuration, so confirm the selected product's physical form and power arrangement. It also claims 15+ maintenance functions while naming no exact universal function set, and says 120+ car brands while separately claiming coverage for most cars after 1996. Supported systems, active tests, reset functions and potential feature activations vary by make, model and year. FCA AutoAuth requires a paid FCA account, with a 12+8 bypass adapter offered as an alternative. Activation requires the app and code, and the listing promises one year of updates. Customer feedback reports mixed connectivity and subscription experiences, so clarify ongoing app or software charges and confirm vehicle compatibility before buying.

What’s in the box

Included

Activation code paper
Customer service email address
Package box
Thinkdiag dongle
User guide

Who is it for?

A good fit for

DIY owners who want app-based access to live data and vehicle-specific service resets.
Mechanics or experienced hobbyists who can verify active-test and module support for their target vehicles.
Phone users prepared to install the app and complete device activation.

Less suited to

Buyers seeking a standalone scanner with an unambiguous built-in display.
Anyone who needs guaranteed compatibility with a particular vehicle function without checking the make, model and year first.
Shoppers who do not want to rely on a phone app, Bluetooth connection or activation process.

Thinkcar Thinkdiag Bluetooth OBD2 Scanner with Bidirectional Tests · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.1 / 5 · 2,081 ratings

5 stars65%65%
4 stars11%11%
3 stars8%8%
2 stars3%3%
1 star13%13%

Customer feedback highlights a user-friendly interface, code recognition and bidirectional control as positives. Reports on functionality, connection reliability and accuracy are mixed, while some customers object to the subscription model. These considerations matter because the scanner relies on an app and Bluetooth connection, and the listing makes many diagnostic functions vehicle-dependent. The ratings lean positive overall, but include a meaningful share of low ratings and do not identify the reasons behind each rating.

Positive themes

Customers mention a user-friendly interface and appreciate code recognition and bidirectional control.

Negative themes

Some customers criticize the subscription model.

Mixed feedback

Customers report mixed experiences with functionality, connectivity and accuracy.

Frequently asked questions

Does the Thinkdiag work without a phone?

The listing describes it as a Bluetooth dongle that requires the Thinkdiag+ app on a compatible Android or iOS phone. It does not establish that the scanner works as a standalone reader.

Will every reset or active test work on my vehicle?

No universal support is established. The listing says functions vary by vehicle make, model and year, and some older cars may not support active tests. Check compatibility for the exact vehicle and functions you need.

Are FCA gateway functions included without extra cost?

The listing says FCA AutoAuth use requires a paid FCA account. It also mentions using a 12+8 bypass adapter cable as an alternative, but does not list that cable among the included items.

How long are software updates included?

The listing claims one year of updates without charge. It also includes customer feedback reporting mixed reactions to subscriptions, so clarify any costs after that period.