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The 24 best-selling diagnostic on AliExpress

We picked 24 diagnostic from AliExpress with real orders and good reviews. Prices go from $1.78 to $23.68, the average rating is 4.8 stars and the most popular one has 68k orders. Every product opens on AliExpress, where you pay with buyer protection.

Updated: 2026-11

  1. 1V410 OBD2 Car Diagnostic Scanner – All-in-One Diagnostic Tool for Identifying and Troubles-63%V410 OBD2 Car Diagnostic Scanner – All-in-One Diagnostic Tool for Identifying and Troubles$7.04 $18.91★ 4.9 · 68k soldView on AliExpress →
  2. 2Car Truck Voltage Circuit Tester Auto 6V 24V Tools Car Diagnostic Probe Test Pen Light Bul-55%Car Truck Voltage Circuit Tester Auto 6V 24V Tools Car Diagnostic Probe Test Pen Light Bul$4.72 $10.53★ 4.9 · 66.6k soldView on AliExpress →
  3. 3Car Obd2 Scanner Diagnostic Tool Code Reader Engine Fault Code Reader Scanner Can Diagnose-65%Car Obd2 Scanner Diagnostic Tool Code Reader Engine Fault Code Reader Scanner Can Diagnose All Obd I$8.30 $23.73★ 4.5 · 62.4k soldView on AliExpress →
  4. 4Professional Obd2 Diagnostic Tool for Heavy-Duty Vehicle Repair - Code Reader/Resetter, Su-50%Professional Obd2 Diagnostic Tool for Heavy-Duty Vehicle Repair - Code Reader/Resetter, Supports Real-Time$12.24 $24.45★ 4.9 · 48.6k soldView on AliExpress →
  5. 56V 12V 24V Car Truck Voltage Circuit Tester Auto Car Diagnostic Probe Test Pen Light Bulb-71%6V 12V 24V Car Truck Voltage Circuit Tester Auto Car Diagnostic Probe Test Pen Light Bulb$3.89 $13.20★ 4.8 · 42.1k soldView on AliExpress →
  6. 6V519 Professional Obd2 Scanner - Usb-Powered Automotive Diagnostic Tool with Real-Time Dat-70%V519 Professional Obd2 Scanner - Usb-Powered Automotive Diagnostic Tool with Real-Time Dat$7.46 $24.94★ 4.9 · 38.3k soldView on AliExpress →
  7. 7Popular ELM327 WiFi OBD2 Diagnostic Scanner V1.5 Car Code Reader Check Engine Fault Detect-54%Popular ELM327 WiFi OBD2 Diagnostic Scanner V1.5 Car Code Reader Check Engine Fault Detect$4.45 $9.69★ 4.9 · 30.4k soldView on AliExpress →
  8. 8M9 2026 OBD2 Code Reader Car Diagnostic Scanner Vehicle Scanner Tool for Automotive Troubl-57%M9 2026 OBD2 Code Reader Car Diagnostic Scanner Vehicle Scanner Tool for Automotive Troubl$3.46 $7.96★ 4.9 · 24k soldView on AliExpress →
  9. 910Pcs 30V Diagnostic Tools Multimeter Test Lead Extention Back Piercing Needle Tip Probes -61%10Pcs 30V Diagnostic Tools Multimeter Test Lead Extention Back Piercing Needle Tip Probes Car Automo$1.78 $4.58★ 4.8 · 23.7k soldView on AliExpress →
  10. 10Universal Brake Fluid Tester Accurate Oil Quality Diagnostic Tools LED Indicator Liquid Te-59%Universal Brake Fluid Tester Accurate Oil Quality Diagnostic Tools LED Indicator Liquid Testing Pen$3.25 $7.91★ 4.9 · 20.9k soldView on AliExpress →
  11. 11Universal Brake Fluid Tester Accurate Oil Quality Diagnostic Tools LED Indicator Liquid Te-57%Universal Brake Fluid Tester Accurate Oil Quality Diagnostic Tools LED Indicator Liquid Testing Pen$4.14 $9.66★ 4.8 · 10.7k soldView on AliExpress →
  12. 12Mini ELM327 V1.5/V2.1 Bluetooth OBD2 Scanner Code Reader Car Diagnostic Tools Check Engine-58%Mini ELM327 V1.5/V2.1 Bluetooth OBD2 Scanner Code Reader Car Diagnostic Tools Check Engine$3.04 $7.29★ 4.9 · 10.4k soldView on AliExpress →
  13. 13ELM327 V2.1 OBD2 Scanner Bluetooth Car Diagnostic Tool For Android /IOS Code Reader Automo-58%ELM327 V2.1 OBD2 Scanner Bluetooth Car Diagnostic Tool For Android /IOS Code Reader Automo$3.68 $8.74★ 4.9 · 9.9k soldView on AliExpress →
  14. 146V 12V 24V Car Truck Voltage Circuit Tester Auto Car Diagnostic Probe Test Pen Light Bulb-58%6V 12V 24V Car Truck Voltage Circuit Tester Auto Car Diagnostic Probe Test Pen Light Bulb$5.56 $13.25★ 4.7 · 8.9k soldView on AliExpress →
  15. 15Car Diagnostic Tool CY3001 OBD2 Scanner Code Reader Car Voltage Tester Engine Fault Code S-55%Car Diagnostic Tool CY3001 OBD2 Scanner Code Reader Car Voltage Tester Engine Fault Code S$10.40 $23.16★ 4.9 · 8.7k soldView on AliExpress →
  16. 161-20Pcs Universal Car SRS Airbag Simulator Emulator Resistor Bypass Fault Finding Diagnost-58%1-20Pcs Universal Car SRS Airbag Simulator Emulator Resistor Bypass Fault Finding Diagnostic Tool Ai$2.41 $5.69★ 4.9 · 8.5k soldView on AliExpress →
  17. 17Mini ELM327 V2.1 OBD2 Scanner Code Reader Bluetooth Car Diagnostic Tool For Android /IOS A-57%Mini ELM327 V2.1 OBD2 Scanner Code Reader Bluetooth Car Diagnostic Tool For Android /IOS Automotive$3.04 $7.14★ 4.5 · 7.2k soldView on AliExpress →
  18. 18ANENG LED Indicator Light Relay Diagnostic Universal Car Relay Tester Voltage Tester RT01-56%ANENG LED Indicator Light Relay Diagnostic Universal Car Relay Tester Voltage Tester RT01$9.78 $22.41★ 4.9 · 6.9k soldView on AliExpress →
  19. 19V600 OBD2 Diagnostic Scanner Car Code Reader Vehicle Health Inspection Tool Auto Code Read-54%V600 OBD2 Diagnostic Scanner Car Code Reader Vehicle Health Inspection Tool Auto Code Read$8.10 $17.66★ 4.9 · 6.7k soldView on AliExpress →
  20. 20Vgate ICar Pro ELM327 V2.3 Bluetooth 4.0 WIFI for iOS BT3.0 Android OBD2 Diagnostic Tool E-57%Vgate ICar Pro ELM327 V2.3 Bluetooth 4.0 WIFI for iOS BT3.0 Android OBD2 Diagnostic Tool E$23.68 $55.48★ 4.9 · 6.6k soldView on AliExpress →
  21. 21V510 Professional Obdii Diagnostic Scanner, Engine Fault Code Reader, Live Data Stream, I/-61%V510 Professional Obdii Diagnostic Scanner, Engine Fault Code Reader, Live Data Stream, I/$9.99 $25.43★ 4.9 · 6.3k soldView on AliExpress →
  22. 22Car Truck Voltage Circuit Tester 6V 12V 24V Auto Car Diagnostic Probe Test Pen Light Bulb-55%Car Truck Voltage Circuit Tester 6V 12V 24V Auto Car Diagnostic Probe Test Pen Light Bulb$5.96 $13.29★ 4.9 · 6.3k soldView on AliExpress →
  23. 23K DCAN K+CAN FTDI Chip OBD2 Auto Car Diagnostic Tools OBD 2 Scanner Switch USB Interface C-53%K DCAN K+CAN FTDI Chip OBD2 Auto Car Diagnostic Tools OBD 2 Scanner Switch USB Interface C$16.95 $36.04★ 4.6 · 5.3k soldView on AliExpress →
  24. 24LED Indicator Light Car Battery Checker Electronic Test Car Relay Tester Diagnostic Tools-57%LED Indicator Light Car Battery Checker Electronic Test Car Relay Tester Diagnostic Tools$8.30 $19.18★ 4.7 · 5.2k soldView on AliExpress →

Quick picks

Most popularV410 OBD2 Car Diagnostic Scanner – All-in-One Diagnostic Tool for Identifying an$7.04 · ★ 4.9 · 68k soldCheapest well rated2pcs Multimeter Test Leads Kit Car Tip Probes Diagnostic Tools 600V 10A Non Dest$1.36 · ★ 4.9 · 2k soldBiggest discount6V 12V 24V Car Truck Voltage Circuit Tester Auto Car Diagnostic Probe Test Pen L$3.89 · ★ 4.8 · 42.1k sold

How much to pay

Tip: read the latest buyer photos on AliExpress and check the size or model before you order. Products with many orders and a rating of 4.7 or more are usually the safest choice.

Questions

What is the best-selling diagnostic?

The most popular one is "V410 OBD2 Car Diagnostic Scanner – All-in-One Diagnostic Tool for Identifying and Troubles", with 68k orders.

How much does a diagnostic cost?

In this list prices go from $1.36 to $541; half of them cost less than $8.30.

Which diagnostic has the best reviews?

"V410 OBD2 Car Diagnostic Scanner – All-in-One Diagnostic Tool for Identifying and Troubles" has an average of 4.9 stars with many orders.

Are there discounts?

Yes. On average these products are 56% below their original price on AliExpress. Prices change often.

Prices and ratings come from AliExpress and can change. We may earn a commission when you buy through our links, at no extra cost to you.

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