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The 24 best-selling fault on AliExpress

We picked 24 fault from AliExpress with real orders and good reviews. Prices go from CHF 1.93 to CHF 196, the average rating is 4.8 stars and the most popular one has 30.4k orders. Every product opens on AliExpress, where you pay with buyer protection.

Updated: 2026-11

  1. 1Popular 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 →
  2. 2RELIFE XA5 Inductance Tester Electromagnetic Non-Contact Fault Detection-53%RELIFE XA5 Inductance Tester Electromagnetic Non-Contact Fault DetectionCHF 1.93 CHF 4.14★ 4.9 · 23.3k soldView on AliExpress →
  3. 3Car 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 →
  4. 41-20Pcs 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 →
  5. 5V510 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 →
  6. 6KONNWEI KW330 Car OBD2 Fault Scanner Engine Battery Test Fault Code Clear Real-Time DKONNWEI KW330 Car OBD2 Fault Scanner Engine Battery Test Fault Code Clear Real-Time DCHF 26.37★ 4.7 · 3.8k soldView on AliExpress →
  7. 7Bluetooth ELM327 OBD2 Car Code Reader Scanner V1.5 Fault Detector Check Engine Automotive-67%Bluetooth ELM327 OBD2 Car Code Reader Scanner V1.5 Fault Detector Check Engine AutomotiveCHF 2.43 CHF 7.34★ 4.9 · 3.3k soldView on AliExpress →
  8. 8V318 Auto Diagnostic Tool Scanner Automobile Battery Tester OBD2 Automobile Clear Fault De-57%V318 Auto Diagnostic Tool Scanner Automobile Battery Tester OBD2 Automobile Clear Fault DeCHF 13.04 CHF 30.62★ 4.9 · 2.9k soldView on AliExpress →
  9. 9V318 Auto Diagnostic Tool Scanner Automobile Battery Tester OBD2 Automobile Clear Fault De-50%V318 Auto Diagnostic Tool Scanner Automobile Battery Tester OBD2 Automobile Clear Fault Detects SuppCHF 15.66 CHF 31.30★ 4.7 · 2.5k soldView on AliExpress →
  10. 10KONNWEI KW906 Bluetooth5.0 - 5.2 OBD2 Scanners ELM327 V1.5 OBDII Fault Diagnostic Tool for-60%KONNWEI KW906 Bluetooth5.0 - 5.2 OBD2 Scanners ELM327 V1.5 OBDII Fault Diagnostic Tool forCHF 11.02 CHF 27.49★ 4.7 · 1.4k soldView on AliExpress →
  11. 11KONNWEI KW905 ELM327 OBD2 Scanner Bluetooth 5.0 Engine Fault Scanner Tool OBDII Code Reade-54%KONNWEI KW905 ELM327 OBD2 Scanner Bluetooth 5.0 Engine Fault Scanner Tool OBDII Code ReadeCHF 13.09 CHF 28.30★ 4.7 · 1.1k soldView on AliExpress →
  12. 12KONNWEI KW906 ELM327 V1.5 OBD2 Car Fault Scanners Bluetooth 5.0 OBDII Diagnostic ToolKONNWEI KW906 ELM327 V1.5 OBD2 Car Fault Scanners Bluetooth 5.0 OBDII Diagnostic ToolCHF 10.15★ 4.5 · 739 soldView on AliExpress →
  13. 13KONNWEI KW330 Car OBD2 Diagnosis Tool Fault Scanner Engine Battery Test DTC LOOKUP Real-Ti-54%KONNWEI KW330 Car OBD2 Diagnosis Tool Fault Scanner Engine Battery Test DTC LOOKUP Real-Time Data StreamCHF 27.95 CHF 60.95★ 4.7 · 657 soldView on AliExpress →
  14. 14Professional V520 Multi-language Automotive OBD2 Scanner Diagnostic Tool Real Time Data OB-58%Professional V520 Multi-language Automotive OBD2 Scanner Diagnostic Tool Real Time Data OBD2 Fault ErrorCHF 15.37 CHF 36.20★ 4.9 · 475 soldView on AliExpress →
  15. 15LAUNCH X431 Creader CR3001 OBD2 Scanner Engine Fault Automotive OBDII OBD Code Reader Diag-57%LAUNCH X431 Creader CR3001 OBD2 Scanner Engine Fault Automotive OBDII OBD Code Reader Diagnostic ScaCHF 18.60 CHF 43.67★ 4.9 · 428 soldView on AliExpress →
  16. 16Car OBD2 Scanner Diagnostic Tool Code Reader, Car Voltage Tester Engine Fault Code Scanner-49%Car OBD2 Scanner Diagnostic Tool Code Reader, Car Voltage Tester Engine Fault Code Scanner, Charging Tester DiCHF 11.20 CHF 21.78★ 4.5 · 343 soldView on AliExpress →
  17. 17Indicator Load Resistor 12V 20W Solve Blinker Error 26 Ohm LED Turn Signal Lights Fault De-7%Indicator Load Resistor 12V 20W Solve Blinker Error 26 Ohm LED Turn Signal Lights Fault Decoder Motorcycle FlaCHF 2.31 CHF 2.48★ 4.7 · 338 soldView on AliExpress →
  18. 18KONNWEI KW371 2in1 Car Battery Tester & 4 Pin 5 Pin Relay Tester 6V 12V 24V Fault Data Pri-56%KONNWEI KW371 2in1 Car Battery Tester & 4 Pin 5 Pin Relay Tester 6V 12V 24V Fault Data Print Start TestCHF 43.02 CHF 98.56★ 4.9 · 213 soldView on AliExpress →
  19. 19KONNWEI MAXOBD Full System OBD2 Fault Scanner Bluetooth 5.2 Car OBDII Diagnostic Tool 41+ -9%KONNWEI MAXOBD Full System OBD2 Fault Scanner Bluetooth 5.2 Car OBDII Diagnostic Tool 41+ Dedicated DataCHF 21.87 CHF 24.14★ 4.7 · 160 soldView on AliExpress →
  20. 20JDiag M200 PRO Diagnostic Scanner For Honda ECU Remap Scanner Battery Tester ABS System Fa-35%JDiag M200 PRO Diagnostic Scanner For Honda ECU Remap Scanner Battery Tester ABS System Fault Codes UniversalCHF 196 CHF 302★ 4.7 · 79 soldView on AliExpress →
  21. 21VDIAGTOOL VD30PRO OBD2 Scanner Car Engine Fault Code Reader OBDII Diagnostic Check Engine -47%VDIAGTOOL VD30PRO OBD2 Scanner Car Engine Fault Code Reader OBDII Diagnostic Check Engine Light Live Data BattCHF 24.59 CHF 46.40★ 4.6 · 78 soldView on AliExpress →
  22. 22OBD2 Scanner Car Diagnostic Scanner ABS SRS Transmission System Scanner Check Engine Fault-39%OBD2 Scanner Car Diagnostic Scanner ABS SRS Transmission System Scanner Check Engine Fault Code ReadCHF 72.28 CHF 118★ 5.0 · 59 soldView on AliExpress →
  23. 23Obd2 Scanner Code Reader Car Diagnostic Tool Engine Fault Code Reader, Used to Clear Cel, -52%Obd2 Scanner Code Reader Car Diagnostic Tool Engine Fault Code Reader, Used to Clear Cel, with Real-TimeCHF 9.13 CHF 19.03★ 4.9 · 49 soldView on AliExpress →
  24. 24KONNWEI KW330 Professional Car OBD2 Diagnostic Tool Engine Battery Testing Fault Code Eras-8%KONNWEI KW330 Professional Car OBD2 Diagnostic Tool Engine Battery Testing Fault Code Erase Real-Time DataCHF 31.67 CHF 34.35★ 5.0 · 41 soldView on AliExpress →

Quick picks

Most popularPopular ELM327 WiFi OBD2 Diagnostic Scanner V1.5 Car Code Reader Check Engine FaCHF 3.56 · ★ 4.9 · 30.4k soldBest ratedOBD2 Scanner Car Diagnostic Scanner ABS SRS Transmission System Scanner Check EnCHF 72.28 · ★ 5.0 · 59 soldCheapest well ratedRELIFE XA5 Inductance Tester Electromagnetic Non-Contact Fault DetectionCHF 1.93 · ★ 4.9 · 23.3k soldBiggest discountBluetooth ELM327 OBD2 Car Code Reader Scanner V1.5 Fault Detector Check Engine ACHF 2.43 · ★ 4.9 · 3.3k 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 fault?

The most popular one is "Popular ELM327 WiFi OBD2 Diagnostic Scanner V1.5 Car Code Reader Check Engine Fault Detect", with 30.4k orders.

How much does a fault cost?

In this list prices go from CHF 1.93 to CHF 196; half of them cost less than CHF 15.66.

Which fault has the best reviews?

"OBD2 Scanner Car Diagnostic Scanner ABS SRS Transmission System Scanner Check Engine Fault Code Read" has an average of 5.0 stars with many orders.

Are there discounts?

Yes. On average these products are 43% 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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