DIAGBOX 9.150
The official PSA Group dealer diagnostic software for Peugeot and Citroën — the modern replacement for Lexia 3 that supports all current models. Perform full system diagnostics, ECU programming, BSI coding, key programming, and DPF resets exactly as an authorised dealer would. Instant digital delivery, installation video included, and free remote setup via AnyDesk.
Included
Digital Download Only
Instant digital download available immediately after payment. No physical product will be shipped.
Remote Installation
Free remote installation via AnyDesk if needed. We connect directly to your PC and install everything for you.
Description
DiagBox — The official Peugeot & Citroën dealer diagnostic software
DiagBox is the official PSA Group diagnostic and ECU programming software used by authorised Peugeot and Citroën dealerships worldwide. It gives independent workshops and car owners full dealer-level access to every system in their vehicle — without the cost of a dealership visit.
DiagBox vs Lexia 3: DiagBox is the modern replacement for the older Lexia 3 / PP2000 tool. It supports all current Peugeot and Citroën models with a modern interface, full ECU programming, BSI coding, and advanced functions that Lexia 3 cannot perform on newer vehicles. If you own a Peugeot or Citroën built after 2010, DiagBox is the tool you need.
Full System Diagnostics
Read and clear fault codes from every module — engine, gearbox, ABS, airbag, BSI, ESP, power steering, climate control, infotainment, and all auxiliary systems across your Peugeot or Citroën.
ECU Programming & BSI Coding
Perform ECU programming, variant coding, and BSI (Body Systems Interface) initialisation. Program replacement modules and activate vehicle options exactly as an authorised dealer would.
Key & Transponder Programming
Add, program, or replace keys and transponders for Peugeot and Citroën vehicles. Handle lost key situations, spare key programming, and immobiliser operations without a dealer visit.
Service Resets & Actuator Tests
Perform oil service resets, DPF regenerations, brake pad resets, injector coding, throttle body adaptations, and actuator tests — all the maintenance functions requiring factory-level access.
Live Data & Parameter Monitoring
Monitor real-time sensor data, engine parameters, and system values across all modules. Identify faults faster with live data streams and guided diagnostic procedures.
Wide Model Coverage
Covers all Peugeot and Citroën models from early 2000s to the most recent supported year — including petrol, diesel, hybrid, and electric variants across passenger cars and commercial vehicles.
Both PSA brands — one software
DiagBox covers the complete Peugeot and Citroën vehicle range — from city cars to commercial vans, including petrol, diesel, hybrid, and full electric models.
Peugeot Cars
108, 208, 308, 408, 508, 2008, 3008, 5008, RCZ & more
Citroën Cars
C1, C3, C4, C5, C5 Aircross, C3 Aircross, DS models & more
Peugeot Vans
Partner, Expert, Boxer — all generations
Citroën Vans
Berlingo, Dispatch, Relay — all generations
Windows PC
Windows 10 / 11 compatible
Model Years
Early 2000s up to the most recent covered release
⚠️ Not sure if your specific model is covered? Contact us before buying — we'll confirm instantly.
What you get with your purchase
One payment. Instant access. Everything below is included — no subscriptions, no hidden fees.
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DiagBox full software — complete version for Peugeot & Citroën, ready to install
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Instant download link sent to your email and account immediately after payment
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Step-by-step installation video — clear walkthrough from download to first launch
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Written setup guide with screenshots
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Free remote installation via AnyDesk — we connect to your PC and install it for you if needed, at no extra cost
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Fast personal support — real replies from a real person, not a chatbot
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Full coverage for Peugeot & Citroën — both brands included in one package
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Lifetime access to your purchased version
From purchase to first diagnosis — in minutes
Here's exactly what happens after you complete your order:
Place your order
Complete your secure payment in a few clicks. All major payment methods accepted.
Receive instant access
Your download link arrives by email immediately and is also visible in your account on our website. No waiting.
Watch the installation video
Follow our step-by-step video — every click from download to first launch of DiagBox is covered.
Stuck? We install it for you — free
Contact us, we connect via AnyDesk, and install DiagBox on your PC remotely at no charge. No technical knowledge needed on your side.
Start diagnosing your Peugeot or Citroën like a dealer
Connect your interface to the OBD2 port, launch DiagBox, and get full dealer-level access to every system in your vehicle.
Support that's actually there when you need it
We don't disappear after payment. Every customer gets real, hands-on help — including free remote installation via AnyDesk.
Free Remote Installation via AnyDesk
Can't get DiagBox installed? We connect to your PC and install everything for you — completely free. You don't need to be technical at all.
Installation Video Guide
A dedicated video walks you through every installation step. Watch, pause, follow along — most customers are up and running in under 20 minutes.
Fast Personal Replies
You reach a real person when you contact us — not a bot or a ticket queue. We reply fast and stay with you until everything works perfectly.
Instant Digital Delivery
Payment confirmed = download link sent immediately. Straight to your email and into your account. No delays, no waiting for business hours.
What our customers say
Real feedback from real buyers.
"Finally replaced my old Lexia 3 with DiagBox. The difference is night and day — full ECU programming on my Peugeot 3008 that Lexia simply couldn't do. Installation was done remotely in 15 minutes."
"Used DiagBox to program a replacement BSI on my Citroën C5. Saved over €500 at the dealer. Support was excellent — they stayed with me through the whole process via AnyDesk."
"I service a mixed fleet of Peugeot and Citroën vans. DiagBox handles them all perfectly. Instant delivery, fast support, and the AnyDesk install took less than 20 minutes."
Common questions answered
Everything you need to know before buying DiagBox.
What is DiagBox for Peugeot and Citroën?
DiagBox is the official PSA Group dealer diagnostic and ECU programming software used by authorised Peugeot and Citroën dealerships worldwide. It provides full system diagnostics, ECU programming, key coding, and service resets via a standard OBD2 interface.
What is the difference between DiagBox and Lexia 3?
Lexia 3 is the older generation PSA diagnostic tool. DiagBox is the newer software that replaced it, supporting all current models with full ECU programming, BSI coding, and advanced functions that Lexia 3 cannot perform on vehicles built after 2010.
What Peugeot and Citroën models does DiagBox support?
DiagBox supports all Peugeot and Citroën models from early 2000s to the most recent covered year — including 208, 308, 508, 3008, 5008, C3, C4, C5, C5 Aircross, Berlingo, Partner, Expert, Boxer, and Dispatch. Contact us to confirm your specific model.
Can DiagBox do ECU programming and BSI coding?
Yes. DiagBox supports full ECU programming, variant coding, and BSI (Body Systems Interface) initialisation — the same operations performed by authorised dealers when replacing or reprogramming control units.
What interface do I need to use DiagBox?
DiagBox works with the DiagBox VCI, Lexia 3 PP2000 cable, or compatible third-party OBD2 interfaces. Not sure which interface you need? Contact us before buying and we will recommend the best option for your use case.
How quickly will I receive DiagBox after payment?
Delivery is instant. As soon as your payment is confirmed, the download link is sent to your email and appears in your account on our website. No waiting, no manual processing required.
What if I cannot install DiagBox myself?
We offer free remote installation via AnyDesk. Contact us after purchase, we connect to your computer, and install DiagBox for you. Most installs are completed in 20–30 minutes — completely free for all customers.
Does DiagBox work on Windows 10 and Windows 11?
Yes. DiagBox is compatible with Windows 10 and Windows 11. We recommend at least 4GB of RAM and 40GB of free disk space for smooth operation. Need help with setup? Our AnyDesk remote install is always free.
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