TOP 10 BEST DIAGNOSTIC TEST MEASUREMENT TOOLS UNDER 100

The Best Diagnostic Test Measurement Tools Under $100

Find the best affordable diagnostic test measurement tools under $100, including top-rated OBD2 scanners, battery testers, and home health diagnostic kits.

Whether you're a DIY mechanic looking to decipher that pesky 'Check Engine' light, or simply need reliable home testing kits, finding quality diagnostic tools doesn't have to break the bank. The market is filled with powerful, budget-friendly options that provide accurate measurements and crucial insights.

This guide focuses on the best diagnostic test measurement tools available for under $100. We've curated a selection of high-value items, primarily focusing on essential automotive OBD2 scanners and versatile testing devices, alongside popular home diagnostic kits. These tools offer professional-grade functionality at a price point accessible to everyone, helping you save money on costly garage visits or medical appointments.

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 (3,275 reviews)
  • Reads and clears engine fault codes (DTCs)
  • Supports all OBD II protocols (1996+ vehicles)
  • Simple plug-and-play operation
  • Views freeze frame data
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)
  • Integrated battery testing function
  • Checks emissions readiness (I/M Monitor)
  • Reads and clears vehicle error codes
  • Supports all OBD II protocol vehicles (1996+)
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 (1,219 reviews)
  • 2-in-1 OBD2 Scanner and Battery Tester
  • Performs EVAP and O2 sensor tests
  • Live Data stream display
  • 12V Cranking & Charging System Test
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 (4,619 reviews)
  • Professional-grade code reader
  • Displays real-time Live Data graphs
  • Retrieves generic and manufacturer-specific codes
  • One-click I/M readiness key
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 (1,896 reviews)
  • 2-in-1 OBD2 Scanner and Battery Tester
  • 12V Cranking and Charging Analyzer
  • Enhanced diagnostic capabilities over NT301
  • Lifetime free software updates
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 (4,317 reviews)
  • 12 Panel instant urine drug test kit
  • CLIA Waived for professional and home use
  • Detects common substances (THC, OPI, COC, etc.)
  • Quick and easy-to-read results
07
BinaxNOW COVID-19/Flu A&B Combo Self Test, Reliable COVID/Flu Home Test With 15 Minute Results, 2 Tests

BinaxNOW COVID-19/Flu A&B Combo Self Test, Reliable COVID/Flu Home Test With 15 Minute Results, 2 Tests

BinaxNOW

3.8 (190 reviews)
  • Detects COVID-19 and Influenza A & B
  • Self-test kit for home use
  • Rapid results in just 15 minutes
  • Includes two tests per pack
08
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)
  • Includes Oil Reset function
  • Bluetooth connectivity to repair app
  • Reads Live Data and Freeze Frame
  • Built-in battery and alternator tester
09
TOPDON Bidirectional Scan Tool, 2025 New ArtiDiag900 Lite Automotive Diagnostic Tool for Full System, Scanner for Car with Active Test, 8 Reset, Wireless OBD2 Scanner Diagnostic Tool for All Vehicles

TOPDON Bidirectional Scan Tool, 2025 New ArtiDiag900 Lite Automotive Diagnostic Tool for Full System, Scanner for Car with Active Test, 8 Reset, Wi...

TOPDON

4.3 (1,095 reviews)
  • Bidirectional control (Active Test)
  • Full System diagnostics (not just engine)
  • Wireless OBD2 connectivity
  • Includes 8 common maintenance reset functions
10
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 resets (Oil, SAS, EPB, BMS, TPMS)
  • Diagnoses Engine, ABS, SRS, and Transmission systems
  • Automatic VIN identification (AutoVIN)
  • Lifetime Wi-Fi free updates

Frequently Asked Questions

Can an OBD2 scanner under $100 diagnose all car problems?

No. Scanners under $100 are primarily designed for reading and clearing basic engine codes (DTCs) and checking emissions readiness. They typically do not have the capability to diagnose complex systems like ABS, SRS, or Transmission, nor do they usually offer advanced features like module coding or active tests, which are found in professional bidirectional scanners.

What is the difference between a code reader and a diagnostic tool?

A code reader (like the ANCEL AD310) simply reads and displays the error code. A diagnostic tool (like the FOXWELL NT301 Plus or Innova 5210) offers more advanced functions, such as displaying live data streams, performing battery health checks, and executing service resets (like oil light reset).

Are the home diagnostic test kits accurate?

Kits like the BinaxNOW COVID/Flu test and CLIA Waived drug tests are designed for high accuracy when used correctly, often meeting the same standards as those used in clinical settings. Always follow the instructions precisely for reliable results.

Final Thoughts

Investing in a reliable diagnostic tool under $100 is one of the smartest moves a car owner or proactive individual can make. These affordable devices provide immediate insight, allowing you to diagnose issues quickly, prevent minor problems from becoming major repairs, and save money on unnecessary mechanic visits. Review our top picks, choose the tool that best fits your diagnostic needs, and take control of your maintenance today!