Fueled by a massive library of real-world repair cases and professional service data, TopFix is your reliable AI assistant. It delivers sharper trouble code insights, intelligent thermal imaging analysis, and clear, actionable guidance that explains issues while enabling pros to diagnose faster with confidence. By integrating seamlessly with both diagnostic tools and ITC devices, TopFix anchors a complete, efficient, and intelligent repair ecosystem.
80% Higher Accuracy than a General-Purpose LLM
Automotive-Specific LLM by TOPDON
TopFix is built on TOPDON’s proprietary automotive large language model—trained exclusively on real repair data, vehicle platforms, and professional diagnostic resources.
Frustration-Free. Just Verifiable Answers.
TopFix responds with answers grounded in verified repair cases and technical documentation. It avoids the generic, misleading answers that are so common in modern AI.
Fault Causes Ranked by Probability
Potential fault causes are ranked by likelihood in percentage form, helping you prioritize diagnostics and focus on the most probable issue first.
Make Vehicle Diagnostics Smarter and Easier
For Everyday Drivers
Cut Through Confusion with Quick Code Explanations
Get clear, plain-language explanations for fault codes—no extra searching, no technical confusion.
For Everyday Drivers
Clear Insight Into Your Vehicle’s Health
Ask any car-related question and get reliable guidance to help you drive and maintain your vehicle with confidence.
For Everyday Drivers
Save on Repairs With DIY Guidance You Can Trust
Clear, step-by-step guidance to help you handle basic repairs and keep costs down.
For Technicians
Hit Book Time Without Guesswork
Get vehicle-specific DTC explanations with causes, symptoms, and recommended repairs—without bouncing between tools or tabs.
For Technicians
Quick Access to the Repair Docs You Need
Instant access to professional repair resources, including wiring diagrams, component location maps, and system schematics.
For Technicians
Cut Rework and Avoid Comebacks
Follow guided repair procedures backed by real-world cases to cut guesswork and comebacks.
Turn Thermal Images Into Actionable Insight with TopFix
For diagnostic tools, as long as your diagnostic product subscription is active, you can use TopFix an unlimited number of times, with no limits or extra fees.
For thermal tools, new TopInfrared users receive 100 free uses. Continued use requires an upgrade.
Supported products:
CarPal (no professional repair guide support)
TopScan Lite / Pro / Master
TOPDON ONE Series
TopInfrared APP
How to access:
For car scan tools, you can access the TopFix AI assistant by tapping the robot icon under each code in the DTC display interface.
For thermal imagers, you can access it via the TopInfrared APP.
Yes. Your chat history is saved, and you can review past conversations at any time.
For automotive diagnostics, it provides automotive-specific, vehicle-aware insights, offering far more relevant and professional results than generic AI platforms.
Yes. All responses are generated by TOPDON’s self-developed automotive AI model, trained with professional, validated data to ensure reliable and accurate outputs.
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