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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 CHF 1.42 to CHF 13.56, 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-63%V410 OBD2 Car Diagnostic Scanner – All-in-One Diagnostic ToolCHF 5.63 CHF 15.13★ 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 BulCHF 3.78 CHF 8.42★ 4.9 · 66.6k soldView on AliExpress →
  3. 3Professional Obd2 Diagnostic Tool for Heavy-Duty Vehicle Repair - Code Reader/Resetter, Su-54%Professional Obd2 Diagnostic Tool for Heavy-Duty Vehicle Repair - Code Reader/Resetter, Supports Real-TimeCHF 8.97 CHF 19.49★ 4.9 · 48.6k soldView on AliExpress →
  4. 46V 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 BulbCHF 3.11 CHF 10.56★ 4.8 · 42.1k soldView on AliExpress →
  5. 5V519 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 DatCHF 5.97 CHF 19.95★ 4.9 · 38.3k soldView on AliExpress →
  6. 6Popular 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 DetectCHF 3.56 CHF 7.75★ 4.9 · 30.4k soldView on AliExpress →
  7. 7M9 2026 OBD2 Code Reader Car Diagnostic Scanner Vehicle Scanner Tool-57%M9 2026 OBD2 Code Reader Car Diagnostic Scanner Vehicle Scanner ToolCHF 2.77 CHF 6.37★ 4.9 · 24k soldView on AliExpress →
  8. 810Pcs 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 AutomoCHF 1.42 CHF 3.66★ 4.8 · 23.7k soldView on AliExpress →
  9. 9Universal 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 PenCHF 2.60 CHF 6.33★ 4.9 · 20.9k soldView on AliExpress →
  10. 10Universal 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 PenCHF 3.31 CHF 7.73★ 4.8 · 10.7k soldView on AliExpress →
  11. 11Mini 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 EngineCHF 2.43 CHF 5.83★ 4.9 · 10.4k soldView on AliExpress →
  12. 12Universal Brake Fluid Tester Accurate Oil Quality Diagnostic Tools LED Indicator Liquid Te-68%Universal Brake Fluid Tester Accurate Oil Quality Diagnostic Tools LED Indicator Liquid Testing PenCHF 2.43 CHF 7.49★ 4.8 · 10k soldView on AliExpress →
  13. 13ELM327 V2.1 OBD2 Scanner Bluetooth Car Diagnostic Tool-58%ELM327 V2.1 OBD2 Scanner Bluetooth Car Diagnostic ToolCHF 2.94 CHF 6.99★ 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 BulbCHF 4.45 CHF 10.60★ 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 SCHF 8.32 CHF 18.53★ 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 AiCHF 1.93 CHF 4.55★ 4.9 · 8.5k soldView on AliExpress →
  17. 17Mini ELM327 V2.1 OBD2 Scanner Code Reader Bluetooth Car Diagnostic Tool-57%Mini ELM327 V2.1 OBD2 Scanner Code Reader Bluetooth Car Diagnostic ToolCHF 2.43 CHF 5.71★ 4.5 · 7.2k soldView on AliExpress →
  18. 18Car 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 BulCHF 3.95 CHF 8.74★ 4.9 · 7.1k soldView on AliExpress →
  19. 19ANENG 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 RT01CHF 7.82 CHF 17.93★ 4.9 · 6.9k soldView on AliExpress →
  20. 20V600 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 ReadCHF 6.48 CHF 14.13★ 4.9 · 6.7k 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, ICHF 7.99 CHF 20.34★ 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 BulbCHF 4.77 CHF 10.63★ 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 CCHF 13.56 CHF 28.83★ 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 ToolsCHF 6.64 CHF 15.34★ 4.7 · 5.2k soldView on AliExpress →

Quick picks

Most popularV410 OBD2 Car Diagnostic Scanner – All-in-One Diagnostic ToolCHF 5.63 · ★ 4.9 · 68k soldBest ratedVgate VLinker FS FORScan For Ford ELM327 USB OBD2 Car Diagnostic Tools HS/MS-CANCHF 29.16 · ★ 5.0 · 1.1k soldCheapest well rated10Pcs 30V Diagnostic Tools Multimeter Test Lead Extention Back Piercing Needle TCHF 1.42 · ★ 4.8 · 23.7k soldBiggest discount6V 12V 24V Car Truck Voltage Circuit Tester Auto Car Diagnostic Probe Test Pen LCHF 3.11 · ★ 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", with 68k orders.

How much does a diagnostic cost?

In this list prices go from CHF 1.42 to CHF 1420; half of them cost less than CHF 34.79.

Which diagnostic has the best reviews?

"Vgate VLinker FS FORScan For Ford ELM327 USB OBD2 Car Diagnostic Tools HS/MS-CAN OBD2 Automotive Sca" has an average of 5.0 stars with many orders.

Are there discounts?

Yes. On average these products are 42% 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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