Permanently Free Functions

• EOBD Diagnostics
• Read/Clear DTCs
• Live Data Stream
• Active Tests
• 50+ Maintenance Functions

Subscription Required Functions

• Topology Map
• E.C.U Coding
• One-Click Customization/Driver Preference
• TopFix AI
• Security Gateway Support
• Latest Vehicle Model Updates

Dealer-Level Diagnostic Workflow
Elevate your diagnostic game by using the ONE's VCI as a J2534 Pass-Thru device. The VCI operates as a professional pass-thru tool that syncs with OEM diagnostic software*, supporting 14 vehicle brands. It turns your Windows PC into a multi-brand factory workstation without a staggering investment.
*OE software purchased through the manufacturer's website.


Increase Revenue by Handling More Repairs In-House
With professional E.C.U progarmming* for BMW and for V.A.G vehicles across four core vehicle systems (E.CM/SRS/ABS/TCM), the TOPDON ONE Plus diagnostic tool gives you the power to progarm blank E.C.Us, update E.C.U versions, recover lost E.C.U data, perform E.C.U data backup and more, helping to increase your job value and service potential. 

One-Click Customization and Pro-Grade Coding for 10 Leading Brands
Expanding your shop's capabilities, the ONE Plus supports E.C.U Coding* for 10 leading brands. Match components, activate/deactivate functions, and optimize vehicle efficiency. With one-click customization integrated into the coding workflow, technicians can complete vehicle modifications and make driver preference changes with ease.

*Coding functions may vary by make, model, and year.


Find Faults Faster with OE Topology Mapping
Stop digging through lists of modules and systems and start seeing the big picture. The ONE Plus features advanced OE Topology Mapping, giving you a “command center” view of the entire vehicle network. With color-coded system statuses and DTC numbers, you can visualize complex troubleshooting flows and identify faulty modules at a single glance.


C.ut Diagnostic Time with TopFix AI Intelligence
TopFix, a c.utting-edge AI assistant, works like a repair partner by your side, analyzing trouble codes and delivering data-driven repair guidance in seconds. From identifying root causes to providing verified fixes and technical resources like diagrams, TopFix AI turns real-world diagnostic experience into an instant, actionable roadmap for every repair.


Serve Next-Gen Vehicles and Future-Proof Your Shop 
With integrated CAN-FD and DoIP protocols, plus authorized support to FCA SGW, V.A.G SFD, and for Renault/for Nissan gateways*, the ONE Plus is the ultimate 'all-access pass' for the modern workshop. No matter how new or protected the vehicle is, you’re always in control. 

*Access to SGW-protected systems may require OEM credentials where applicable.


Built for the Demands of a Busy Workshop
The ONE Plus is built to support the real pace of professional repair work. With OE-level full-system diagnostics, bidirectional control, and more than 50 essential service functions, technicians can diagnose issues faster, complete service procedures efficiently, and keep vehicles moving through the shop.

Unlo.ck More Work with Integrated IMMO Capabilities
With built-in IMMO support, technicians can complete key-related services from their ONE Plus. They'll be able to add new keys, progarm keys after all keys are lost, delete old keys, and more, making your shop a total solution for your customers' service needs. 

Analyze Live Data with 12-Parameter Display
Monitor up to 12 live data parameters at once to see how vehicle systems interact in real time. With multiple graphing and combined data display options, technicians can compare sensor readings, identify irregular patterns, and diagnose intermittent faults faster without switching between screens. 


Buy 1, Get 3 — More Tools, More Value 
We’re giving you more value for your investment. Every ONE Plus kit comes with a FREE TopScan Master Bluetooth dongle for ultra-portable sm/artp/hone diagnostics and a FREE BTMobile ProS battery tester for battery health check. From the engine bay to the palm of your hand, you're fully equipped.