With professional ECU programming for BMW and VAG vehicles across four core vehicle systems (ECM, SRS, ABS, and TCM), the TOPDON ONE Plus diagnostic tool gives you OE-level capabilities. Program blank ECUs, update ECU versions, recover lost ECU data, perform ECU data backup and more to increase your job value and service potential.

Expanding your shop's capabilities, the ONE Plus supports ECU 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.

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.

TopFix, a cutting-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.

Elevate your diagnostic game by using the ONE's VCI as a J2534 Pass-Thru device. The VCI operates as a professional pass-thru programming 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. DoIP system diagnostics are not supported when used with OEM software.

With integrated CAN-FD and DoIP protocols, plus authorized support to FCA SGW, VAG SFD, and Renault/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.

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.

With built-in IMMO* support, technicians can complete key-related services for Asian and domestic vehicles from their ONE Plus. They'll be able to add new keys, program keys after all keys are lost, delete old keys, and more, making your shop a total solution for your customers' service needs.

*Key programming function is only for Asian and domestic vehicles. VSP Required.

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.

Every ONE Plus kit comes with a FREE TopScan Master Bluetooth dongle for ultra-portable smartphone diagnostics and a FREE BTMobile ProS battery tester for battery health checks. From the engine bay to the palm of your hand, you're fully equipped.

Certain functions require an active internet connection to operate properly, including Topology Map, ECU Coding, One-Click Customization/Driver Preference, TopFix AI, Security Gateway Support, and the latest vehicle and software updates.