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TOP 10 BEST DIAGNOSTIC TEST MEASUREMENT TOOLS 2025

The Best Diagnostic Test Measurement Tools for Cars and More

Find the best diagnostic test measurement tools, including top-rated OBD2 scanners and battery testers for cars, plus specialized diagnostic kits for various needs.

Whether you're a professional mechanic, a dedicated DIY enthusiast, or simply someone who wants to keep a closer eye on your vehicle’s health, having the right diagnostic test measurement tools is essential. These devices allow you to quickly read error codes, monitor performance, and pinpoint issues before they become costly repairs. From simple code readers to advanced scanners that also test battery health, the market offers a wide range of options.

Our curated list focuses primarily on highly-rated OBD2 scanners, which are crucial for diagnosing modern vehicles (1996 and newer). We also include a few specialized diagnostic tools to cover a broader spectrum of measurement needs. Investing in a reliable diagnostic tool empowers you to take control of your maintenance and make informed decisions about your car's performance and longevity. Explore our top picks to find the perfect tool for your garage or toolbox.

01
ANCEL AD310 Classic Enhanced Universal OBD II Scanner Car Engine Fault Code Reader CAN Diagnostic Scan Tool, Read and Clear Error Codes for 1996 or Newer OBD2 Protocol Vehicle (Black) Global Recycled Standard Global Recycled Standard Global Recycled Standard

ANCEL AD310 Classic Enhanced Universal OBD II Scanner Car Engine Fault Code Reader CAN Diagnostic Scan Tool, Read and Clear Error Codes for 1996 or...

ANCEL

4.6 (2,831 reviews)
  • Classic enhanced universal OBD II scanner for basic diagnostics.
  • Reads and clears engine fault codes (DTCs).
  • Supports all OBD2 protocols for vehicles 1996 and newer.
  • Simple, plug-and-play operation with a clear display.

$23.99

02
OBD2 Scanner with Upgrade Battery Tester - Diagnostic Tool for Cars That Check Engine Light & Emissions Readiness Read and Clears Vehicle Error Codes for All OBD II Protocol Vehicles Since 1996

OBD2 Scanner with Upgrade Battery Tester - Diagnostic Tool for Cars That Check Engine Light & Emissions Readiness Read and Clears Vehicle Error Cod...

OBD2

4.6 (826 reviews)
  • Dual functionality: OBD2 scanner and upgraded battery tester.
  • Checks engine light and emissions readiness (I/M readiness).
  • Reads and clears vehicle error codes quickly.
  • Compatible with all OBD II protocol vehicles since 1996.

$22.99

03
ANCEL AD410 PRO OBD2 Scanner and Battery Tester, 2-in-1 Car Diagnostic Tool, Check Engine Light, EVAP Test, Live Data, 12V Battery Analyzer with Cranking & Charging System Test for Car Motorcycle

ANCEL AD410 PRO OBD2 Scanner and Battery Tester, 2-in-1 Car Diagnostic Tool, Check Engine Light, EVAP Test, Live Data, 12V Battery Analyzer with Cr...

ANCEL

4.6 (3,931 reviews)
  • Professional 2-in-1 OBD2 scanner and 12V battery analyzer.
  • Features advanced functions like EVAP Test and Live Data streaming.
  • Performs cranking and charging system tests for comprehensive battery health.
  • Suitable for both cars and motorcycles (with 12V systems).

$59.99

04
FOXWELL NT301 OBD2 Scanner Live Data Professional Mechanic OBDII Diagnostic Code Reader Tool for Check Engine Light Global Recycled Standard Global Recycled Standard Global Recycled Standard

FOXWELL NT301 OBD2 Scanner Live Data Professional Mechanic OBDII Diagnostic Code Reader Tool for Check Engine Light Global Recycled Standard Global...

FOXWELL

4.5 (1,592 reviews)
  • Professional-grade OBDII diagnostic code reader.
  • Displays real-time Live Data sensor readings.
  • Quickly identifies the cause of the Check Engine Light (CEL).
  • Features a user-friendly interface ideal for mechanics.

$55.98

05
Upgraded of NT301, FOXWELL NT301 Plus 2-in-1 OBD2 Scanner Battery Tester, Professional Check Engine Code Reader Car Diagnostic Tool, 12V Cranking Charging Analyzer for 1996+ Newer Vehicle

Upgraded of NT301, FOXWELL NT301 Plus 2-in-1 OBD2 Scanner Battery Tester, Professional Check Engine Code Reader Car Diagnostic Tool, 12V Cranking C...

Upgraded

4.5 (634 reviews)
  • Upgraded 2-in-1 tool combining OBD2 scanner and battery tester.
  • 12V Cranking and Charging System Analyzer for detailed battery diagnostics.
  • Reads and clears engine codes for 1996 and newer vehicles.
  • Enhanced diagnostic capabilities over the standard NT301 model.

$79.98

06
Identify Diagnostics Drug Test Cups | 5 Pack | 12 Panel CLIA Waived Instant Urine Marijuana Drug Test Kit for AMP,BAR,BUP,BZO,COC,MDMA,MET,MOP|OPI,MTD,OXY,PCP,THC

Identify Diagnostics Drug Test Cups | 5 Pack | 12 Panel CLIA Waived Instant Urine Marijuana Drug Test Kit for AMP,BAR,BUP,BZO,COC,MDMA,MET,MOP|OPI,...

Identify

4.6 (686 reviews)
  • Instant urine drug test kit with 12-panel detection.
  • CLIA Waived for professional and home use.
  • Detects a wide range of substances including THC, COC, OPI, and MET.
  • Comes in a convenient 5-pack for multiple measurements.

$21.79

07
Innova 5210 OBD2 Scanner & Engine Code Reader, Battery Tester, Live Data, Oil Reset, Car Diagnostic Tool for Most Vehicles, Bluetooth Compatible with America's Top Car Repair App

Innova 5210 OBD2 Scanner & Engine Code Reader, Battery Tester, Live Data, Oil Reset, Car Diagnostic Tool for Most Vehicles, Bluetooth Compatible wi...

Innova

4.5 (3,600 reviews)
  • Multi-functional tool: OBD2 scanner, battery tester, and oil reset.
  • Bluetooth compatibility links to a top car repair app for detailed fixes.
  • Provides Live Data stream for real-time performance monitoring.
  • Designed for use on most vehicles, offering broad coverage.

$89.99

08
MOTOPOWER MP69033 Car OBD2 Scanner Code Reader Engine Fault Scanner CAN Diagnostic Scan Tool for All OBD II Protocol Cars Since 1996, Yellow

MOTOPOWER MP69033 Car OBD2 Scanner Code Reader Engine Fault Scanner CAN Diagnostic Scan Tool for All OBD II Protocol Cars Since 1996, Yellow

MOTOPOWER

4.6 (5,428 reviews)
  • Affordable and easy-to-use OBD2 code reader.
  • Reads and clears engine fault codes (DTCs).
  • Supports CAN and all other OBD II protocols.
  • Compact design, ideal for quick diagnostics and home use.

$19.99

09
OBD2 Scanner TOPDON AD500, Oil SAS Throttle TPMS BMS EPB Reset, Engine ABS SRS Transmission, Diagnostic Scan Tool, AutoVIN, Car Check Engine Code Reader with Battery Test, Lifetime Wi-Fi Free Update

OBD2 Scanner TOPDON AD500, Oil SAS Throttle TPMS BMS EPB Reset, Engine ABS SRS Transmission, Diagnostic Scan Tool, AutoVIN, Car Check Engine Code R...

TOPDON

4.4 (1,400 reviews)
  • Advanced diagnostic tool covering Engine, ABS, SRS, and Transmission systems.
  • Includes specialized reset functions (Oil, SAS, Throttle, EPB, BMS, TPMS).
  • Features AutoVIN technology for quick vehicle identification.
  • Offers lifetime free Wi-Fi updates to ensure compatibility.

$149.99

10
Roche Diagnostics 04625315160 CoaguChek® XS Coagulation Test Strip (Pack of 48)

Roche Diagnostics 04625315160 CoaguChek® XS Coagulation Test Strip (Pack of 48)

Roche

3.8 (6 reviews)
  • Specialized diagnostic measurement tool for coagulation testing.
  • Designed for use with the CoaguChek XS system.
  • Measures INR and PT values for blood clotting monitoring.
  • Comes in a pack of 48 test strips for ongoing use.

$320.09

Frequently Asked Questions

What is the difference between an OBD2 code reader and a diagnostic scanner?

A basic OBD2 code reader simply reads and clears generic engine fault codes (DTCs). A full diagnostic scanner offers more advanced functions, such as reading manufacturer-specific codes, viewing live sensor data, performing system tests (like EVAP), and often includes service reset functions (oil, battery, brake).

Can these diagnostic tools help me pass an emissions test?

Yes. Most quality OBD2 scanners feature an 'I/M Readiness' function. This quickly checks if all the vehicle's emission monitors (like O2 sensors and catalytic converter) have run and passed their self-tests, indicating the car is ready for an emissions inspection.

How often should I use a battery tester on my car?

It is recommended to test your battery, cranking system, and charging system at least twice a year, especially before extreme weather seasons (hot summer and cold winter). Tools with integrated battery testers, like the ANCEL AD410 PRO, make this process fast and easy.

Are specialized diagnostic tools, like drug test cups, regulated?

Yes, products like the Identify Diagnostics Drug Test Cups are often CLIA Waived, meaning they meet federal standards for accuracy and reliability for use in settings like doctor's offices or for home testing.

Final Thoughts

Selecting the right diagnostic test measurement tool is a crucial step toward proactive maintenance. For automotive users, the 2-in-1 OBD2 scanners and battery testers offer the best combination of value and functionality, allowing you to diagnose engine issues and monitor vital electrical health. Review our top selections, compare features like Live Data and system resets, and invest in the tool that will keep you informed and your equipment running smoothly. **Click through to purchase your ideal diagnostic tool today and start measuring with confidence!**