Diagbox 9.129 is PSA Group’s official dealer-level diagnostic software for Peugeot, Citroën, DS, and Opel/Vauxhall vehicles. This complete guide covers everything you need to know: what Diagbox does, how the VMware version works, system requirements, interface setup, and a full walkthrough of using it for PSA diagnostics.
What Is Diagbox?
Diagbox is the official diagnostic platform developed by PSA Group (now Stellantis) for Peugeot, Citroën, DS, and Opel/Vauxhall models built on the PSA platform. It replaced the older Lexia 3 / PP2000 system and brought a unified interface for all PSA electronic control units.
Unlike generic OBD2 scanners that only read engine fault codes, Diagbox communicates with every ECU in the vehicle — BSI (Body Systems Interface), airbag module, ABS/ESP, gearbox, dashboard, immobiliser, and more. It reads and clears faults, performs ECU programming, actuation tests, guided procedures, and service resets.
Diagbox 9.129 vs Earlier Versions
Version 9.129 is one of the most stable and widely used releases in the Diagbox 9.x series. Compared to version 8.x and earlier, it adds:
- Extended vehicle coverage including DS9 and newer Peugeot/Citroën models up to 2022
- Improved BSI programming and configuration functions
- Updated DTC database with guided repair procedures
- Better stability under VMware environments
- Updated key programming procedures for newer immobiliser systems
Vehicle Coverage
- Peugeot: 106, 107, 206, 207, 208, 301, 308, 407, 408, 508, 2008, 3008, 5008, Expert, Partner, Boxer
- Citroën: C1, C2, C3, C4, C5, C6, C8, Berlingo, Jumpy, Jumper, DS3, DS4, DS5
- DS: DS3 Crossback, DS4, DS7 Crossback, DS9
- Opel/Vauxhall: Corsa E/F, Astra K, Grandland X, Crossland X (PSA-platform, post-2017 models)
Key Diagnostic Functions
- Fault code reading and clearing: All systems — engine, gearbox, ABS, airbag, BSI, dashboard, and all body modules
- Live data streaming: Real-time sensor values with graphing
- Actuation tests: Activate individual components (fuel pump, injectors, solenoids, fans)
- ECU programming: Flash and configure ECUs with PSA calibration files
- BSI configuration and reset: Full BSI reconfiguration after replacement
- Airbag reset: Clear crash data and reset airbag module after accident repair
- DPF regeneration: Forced DPF regen cycle to clear blocked particulate filters
- Service reset: Oil service interval, brake service, and maintenance counters
- Key programming: Add and delete transponder keys and remote fobs
- Guided diagnostic procedures: Step-by-step fault diagnosis based on official PSA repair documentation
Diagbox 9.129 VMware Version
Diagbox was designed to run on Windows XP or Windows 7. Running it natively on Windows 10 or 11 requires complex compatibility workarounds. The VMware version solves this completely — it is a pre-configured virtual machine containing a clean Windows 7 installation with Diagbox 9.129 pre-installed, all required Lexia 3 drivers, and USB passthrough ready for your VCI interface. You simply install VMware Player (free) on your Windows 10 or 11 PC, import the VM, and Diagbox launches immediately.
Interface Compatibility
Diagbox communicates with your vehicle through a Vehicle Communication Interface (VCI). The most common options are:
- Lexia 3 / PP2000: The classic PSA interface, connects via USB, works with all Diagbox versions
- Diagbox DiagPlug: Newer plug-and-play interface for CAN-bus vehicles
- Proxia: Professional-grade interface used by PSA dealerships
- J2534 PassThru: Compatible adapters for CAN protocol vehicles
Why Technicians Choose Diagbox Over Generic Scanners
Generic OBD2 scanners — even expensive professional models — have significant limitations on PSA vehicles. Diagbox provides full system access to every module, manufacturer-specific fault codes with full descriptions, guided repair procedures based on official PSA documentation, ECU and BSI programming, and key programming functions that generic tools cannot perform. See how it compares in our Diagbox vs Lexia 3 vs PSA-COM comparison.
Get Diagbox 9.129 — Ready to Use in VMware
Our Diagbox 9.129 VMware image is pre-installed, pre-activated, and ready to launch on any Windows 10 or 11 PC. No setup required — just import and connect your Lexia 3 interface.
More Diagbox 9.129 Guides
- Diagbox vs Lexia 3 vs PSA-COM vs iCarsoft: Best PSA Diagnostic Tool 2025?
- Diagbox 9.129 System Requirements: PC, Windows, Interface & VMware Specs
- Diagbox 9.129 Fault Codes: Common PSA DTCs and How to Fix Them
- Diagbox Version History: From Lexia 3 to Diagbox 9.129
- How to Set Up Diagbox 9.129 in VMware on Windows 10 and 11
- Diagbox 9.129 for Beginners: Your First PSA Diagnostic Session
- Diagbox 9.129 FAQ: 18 Most Asked Questions Answered
