Updated: October, 2025

Best Obd Ii Engine System Diagnostic Tools of 2025

Save up to 30% Off

1

TOPDON

9.8

Exceptional

TOPDON OBD2 Code reader Scanner ArtiDiag500, Engine ABS SRS Transmission Car Diagnostic Tool for all cars, 6 Reset Services for Oil/SAS/TPMS/ETS/BMS/Brake, Wi-Fi Free Update

Why we love it

Comprehensive diagnostics for major car systems.

User-friendly interface with touchscreen and buttons.

Free lifetime software updates.

Main highlights

Comprehensive Diagnostics
Offers ENG/AT/SRS/ABS diagnostics, OBD2 testing, and AutoVIN.

Ideal for Maintenance
Perfect for DIYers and mechanics for efficient car maintenance.

User-Friendly Design
Praised for easy navigation with a 5-inch touchscreen.

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How do we rank?

How do we rank
Our AI-powered platform ranks products using multiple weighted factors from millions of products and user reviews across the web, providing the most valuable and real data. Higher scores rank first.
2

KINGBOLEN

9.5

Excellent

KINGBOLEN EDIAG Elite OBD2 Scanner Bluetooth,Bi-directional Scan Tool Full System Car Diagnostic Tool for iOS & Android,15 Resets Oil,Brake,DPF Regeneration Tool No Subscriptions Lifetime Update.

20% Off

Main highlights

️【15 Reset Functions Lifetime F*ee Update】KINGBOLEN Ediag Elite OBD2 scanner has 15+ resets:Oil Reset, Brake Reset,Headlight Matching, ABS Bleeding, BMS Reset, DPF Reset, EGR Learning, Throttle Learning, Suspension Match, Inject Reset, SAS Reset, Gearbox Learning and more. All resets supports update and use without any subscriptions.Saves you time and money while meeting your routine vehicle maintenance needs.

【Bi-directional Control/Active Tests】KINGBOLEN Ediag Elite is an obd2 bi-directional scan tool,it can allow you send the commands from your mobile and receive the feedback information from vehicle's ECU to do active tests, such as doors / window / A/C clutch / light and sunroof etc,helping you exactly locate the problem. In Addition, Ediag Elite car scanner tool provides fault code search function to let you well know the definition of fault codes and solve them.

【2025 New OBD2 Car Scanner Lifetime F*ee Update】KINGBOLEN Ediag Elite Wireless OBD2 Scanner brings more functions,Not only suitable for most US, Eu, and Asian OBD2 vehicles produced After 1996,But also supports FCA and Can FD vehicle protocol;Based on Android 5.0+, IOS9.0+; Bluetooth 5.2 version for faster BT wireless scan and diagnosis,Bidirectional control for quickly problem identify and solving. All functions support update and use without any subscriptions makes Ediag Elite become more cost-effectiveness. Note: 1.Please download the Ediag Elite mobile apps named ”Ediag“ to use this device; 2. If any help about the activation code,please send your problem ask for a solution.

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3

MOTOPOWER

9.4

Excellent

MOTOPOWER MP69033 OBD2 Scanner Universal Car Engine Fault Code Reader, CAN Diagnostic Scan Tool for All OBD II Protocol Cars

18% Off

Why we love it

Supports multiple car models and languages.

No battery needed; powers from vehicle.

User-friendly LCD screen with clear display.

Main highlights

Comprehensive Diagnostic Capability
Features built-in OBD2 DTC lookup library for engine diagnostics.

Wide Vehicle Compatibility
Ideal for 1996 US-based, 2000 EU-based, Asian cars, and newer vehicles.

User-Friendly Display
Praised for its clear LCD screen with adjustable contrast.

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4

TOPDON

9.3

Excellent

TOPDON CarPal A, OBD2 Scanner, All System Diagnosis, Wireless Bluetooth Diagnostic Tool, Vehicle Health Check, Smog Check, Repair Guide, Engine Inspection, Vehicle Performance Test

20% Off

Why we love it

Comprehensive vehicle health insights.

Easy-to-use Bluetooth connectivity.

Multilingual support available.

Main highlights

Comprehensive Vehicle Health Check
CarPal provides complete diagnostics from engine to steering with tailored repair instructions.

Ideal for Routine Maintenance
Perfect for oil resets, TPMS, and other essential car maintenance tasks.

Praised for User-Friendly Interface
Customers love the intuitive interface and easy access to vehicle data.

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5

MOTOPOWER

9.2

Excellent

MOTOPOWER MP69038 Car OBD2 Scanner Code Reader Engine Fault Code Reader Scanner CAN Diagnostic Scan Tool - Elite Edition

30% Off

Why we love it

Supports multiple vehicle protocols.

No battery required for operation.

User-friendly with a clear display.

Main highlights

Comprehensive Diagnostic Tool
Built-in OBD2 DTC lookup library for engine light diagnosis.

Versatile Compatibility
Ideal for US, EU, and Asian vehicles from 1996 onwards.

User-Friendly Operation
Praised for its easy-to-read LCD display and intuitive interface.

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6

ANCEL

9.1

Excellent

ANCEL AD310 OBD2 Code Reader OBD2 Scanner Universal Car Engine Fault Code Reader, Car Diagnostic Tool for All OBD Vehicles since 1996 & Newer (Black)

12% Off

Why we love it

Easy to use without technical knowledge.

Supports all OBDII protocols and vehicles.

Compact and durable design for easy transport.

Main highlights

Quick and Accurate Diagnostics
Determines check engine light cause, reads/clears codes, and provides live data instantly.

Ideal for DIY Car Maintenance
Perfect for home use to diagnose engine issues without a mechanic.

Praised for User-Friendly Design
Users love its clear display, intuitive interface, and sturdy construction.

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7

MOTOPOWER

9.0

Excellent

MOTOPOWER MP69033 Pro OBD2 Scanner Code Reader Check Engine Fault Light Diagnostic Scan Tool with Battery Tester

30% Off

Main highlights

Plug & Play for Every Driver - No Apps or WiFi needed. No additional battery or charger needed. Extended cable reaches tight spaces, while the intuitive menu works right out of the box. Perfect for DIYers and mechanics.

OBD Code Reader & Battery Tester - the Practical Multi-Functions OBD2 code reader features built-in OBD2 DTC lookup library, which help you to determine the cause of the engine light, read code, erase code, view freeze frame, I/M ready, vehicle information, data flow, real-time curve, get vehicle speed information, calculate load value, engine coolant temperature, get engine speed. You can use it to check fault codes by yourself and display code definitions, understand the health of the vehicle, be fully prepared for going to the auto repair shop for car maintenance.

Advanced Battery & Alternator Test with Real-Time Monitoring - The OBD2 scanner also works as a battery tester to check the battery voltage and its starting performance. Accurately diagnose 12V battery health and alternator output. Live ripple analysis detects diode failures. (Test results may vary with temperature and vehicle age. Refer to manufacturer specs for pass/fail thresholds.)

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8

VPOW

8.9

Very Good

OBD2 Code Reader Diagnostic Scanner: OBD Car Scanner Tool Check Engine Light Fault Code Reader - Auto Car Diagnostic Tool for BMW Ford VW Audi All OBDII Vehicles with Live Data Battery Test

Why we love it

Extensive DTC database for accurate diagnostics.

Fast scanning with latest industrial chip.

User-friendly plug & play design.

Main highlights

Advanced Diagnostic Capability
Built-in 35,901 DTC database with 6X faster scanning speed for comprehensive diagnostics.

Ideal for DIY Car Owners
Perfect for diagnosing check engine lights and saving on repair costs.

Praised User Interface
Clear 2.8-inch LCD display praised for easy readability.

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9

RICOKEY

8.7

Very Good

OBD2 Scanner Car Engine Fault Code Reader Wired ODB2 OBD Diagnostic Scan Tool for Check Engine Light, View Freeze Frame, Live Data, EVAP System Test V302 for 9 OBDII Protocol Vehicles Since 1996

15% Off

Why we love it

1. Powerful: Quickly diagnose troubleshoot.

2. Compatible: Works on most vehicles.

3. Convenient: Easy to read LCD display.

Main highlights

Key Features
Plug and play OBD2 scanner with multi-language support, fast and accurate diagnosis of engine faults, and large, easy-to-read LCD display.

Ideal Use Cases
Perfect for DIYers, home mechanics, and everyday drivers looking to troubleshoot and understand their vehicle`s health quickly and efficiently.

Customer Praise
Customers highly value the scanner`s ease of use, clear instructions, and the ability to save money and time on diagnostics.

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10

RICOKEY

8.5

Good

OBD2 Bluetooth Scanner Code Reader Reset for iOS iPhone Android Windows, Auto Car Diagnostic Scan Tool OBDII Adapter for Check Engine Light for Torque, OBD Fusion, Car Scanner App

17% Off

Why we love it

Compatible with many car models.

Saves money on car repairs.

Real-time data enhances diagnostics.

Main highlights

Wide Compatibility for All Vehicles
Works on all 1996 and newer OBDII compliant vehicles, including gas and 12V diesel.

Ideal for DIY Car Diagnostics
Quickly read and reset engine trouble codes, saving on repair costs.

Highly Praised for Real-Time Data
Customers love the live sensor data feature for accurate diagnostics.

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Our top pick

1

TOPDON OBD2 Code reader Scanner ArtiDiag500, Engine ABS SRS Transmission Car Diagnostic Tool for all cars, 6 Reset Services for Oil/SAS/TPMS/ETS/BMS/Brake, Wi-Fi Free Update
The TOPDON ArtiDiag500 is a versatile car diagnostic tool designed for both DIY enthusiasts and professional mechanics. It offers comprehensive diagnostics for major systems like Engine, ABS, SRS, and transmission, making it a valuable asset for vehicle maintenance. Key features include a user-friendly 5-inch touchscreen and rubberized buttons, ensuring ease of use even with gloves. The tool supports OBD2 testing, AutoVIN for quick vehicle identification, and real-time battery voltage monitoring. With capabilities like oil reset, throttle adaptation, and SAS reset, the ArtiDiag500 not only saves costs but also enhances vehicle performance. It is compatible with most US-based cars since 1996, EU-based cars after 2000, and Asian-based cars after 2008. The device comes with free lifetime software updates and a 2-year warranty, ensuring long-term reliability and up-to-date functionality. Whether you're troubleshooting emission issues or erasing DTCs to turn off warning lights, this tool delivers efficiency and precision.