If your workshop handles commercial vehicles and you’re not already using KESS3’s latest update, you’re missing out. Alientech’s 2.21 release introduces BOOT mode protocols for ACMs in some of the most widely used trucks on the road – offering a major upgrade for tuning professionals.
Let’s break down what’s changed, why it matters, and how it can add serious value to your tuning business.
What’s in Alientech KESS3 Update 2.21?
Alientech’s latest upgrade delivers full BOOT mode access to:
- Continental CM1881 ACMs – used in DAF, Peterbilt, Youtong, and Kenworth trucks with 10.8L and 12.9L Paccar engines
- Scania EEC3 ACMs – found in the 16.4L V8 Scania R-Series, built from 2013 onwards
BOOT mode means direct communication with the module’s memory – not just reading and writing data through the diagnostic port, but complete access via the bench. This allows for deeper repairs, tuning, and customisation that was previously out of reach or required expensive third-party services.
Which Vehicles Are Now Supported on KESS3?
Here’s a quick reference list of the supported vehicles in this update:
- DAF – Paccar 10.8L and 12.9L
- Peterbilt – Paccar 10.8L and 12.9L
- Youtong – Paccar 10.8L and 12.9L
- Kenworth – Paccar 10.8L and 12.9L
- Scania R-Series – 16.4L V8 (EEC3)
These are high-demand vehicles with complex aftertreatment systems. Having the capability to programme or repair ACMs in-house is a genuine advantage for any tuner or workshop working in this sector.
What is BOOT Mode and Why Should You Use It?
BOOT mode allows you to connect directly to the control unit’s board and access low-level data. It’s a manual, bench-based process that bypasses the software protections and limitations you’d encounter through OBD.
Why that’s important:
- You can clone modules for replacement
- You can recover bricked ECUs or ACMs
- You can customise regen behaviour and aftertreatment settings
- You gain full flexibility when solving faults or carrying out performance tuning
This level of access means fewer restrictions, more control, and the ability to handle complex jobs that other tuners might turn down.
Why This KESS3 Update Matters for Your Business
Whether you’re running a small workshop or scaling a larger operation, having full BOOT mode access for ACMs opens up new services that keep your customers coming back:
- Reduced downtime – you solve problems fast, which clients love
- No outsourcing – keep control (and the margin) in-house
- Offer what others can’t – stand out with technical capability
- More reliable fixes – deeper access means better diagnostics and tuning
At VIEZU, we’ve seen time and again how adopting the latest protocols and tools gives businesses a genuine edge – not just in what they can do, but how confident they feel doing it.
Where to Get KESS3 Tools and Training
If you want to take advantage of this update, we’ve got you covered. VIEZU are official Alientech distributors and we don’t just sell hardware – we train you to use it properly. We offer everything from initial set up to ongoing training and support – and best of all, our tool training for KESS3 is absolutley free, and available from the VIEZU Technical Academy.
- Get your KESS3 tool or adapter kits from VIEZU Tuning Tools
- Book an expert-led hands-on course through Remap101 and get real experience with BOOT mode, ACM tuning, and more
We support beginners and experienced tuners alike, and our courses are structured around real-world jobs – not theoretical fluff.
FAQs
What exactly is BOOT mode?
It’s a method of accessing an ECU or ACM by physically connecting to the board, allowing you to bypass software locks and access the memory directly. It’s especially useful when the unit can’t be programmed through the diagnostic port.
Is BOOT tuning risky or likely to damage a module?
As long as it’s done correctly, it’s safe. That said, it’s not something you should attempt without training. One slip with a probe and you could damage the board. That’s why we offer practical training at Remap101.
Do I need new hardware to use these protocols?
Most KESS3 users will already have what they need. You’ll want the right probe adapters and a solid bench setup. If you’re not sure, speak to the VIEZU team and we’ll walk you through it.
Is there demand for ACM tuning in the UK?
Yes – and it’s growing. With fleets under pressure to stay compliant and keep vehicles on the road, ACM faults are increasingly common. If you can offer fixes in-house, you’re solving a real problem.
What can I actually do with ACM access?
Everything from fault diagnosis and regen issues to component matching and module cloning. You can also tailor aftertreatment behaviour for off-road or motorsport uses – depending on your client’s needs and local laws.
KESS3 Tuning Start Up Kits: Buyers Guide
Starting a vehicle tuning business is a significant step. It is not just about buying a gadget. It is about choosing the foundational equipment that will dictate your future workflow and success. The market is filled with options, but the Alientech KESS3 Tuning Tool appears to be a leading choice for professionals. However, simply deciding [...]
Tuning Start Up Kits: The orginal and the best
The Tuning Start Up Kits, Refined by Experience New and Improved Business Ready Packages from VIEZU For years, VIEZU’s Start Up Kits have helped hundreds of tuners launch or expand their tuning businesses with confidence. Now, they’re better than ever. With enhanced configurations, updated support tools, and more flexible finance options, these new and improved [...]
Why You Should Have More Than One Professional Vehicle Tuning Tool
Investing in your first piece of authentic, professional tuning equipment is a milestone for any vehicle tuning business. It marks the transition from enthusiast to professional. However, as your business grows and the variety of vehicles you work on expands, you will likely discover that a single tuning tool, no matter how capable, has its [...]
More Coverage, Less Cost: Alientech’s 2026 KESS3 Activation & Renewal Savings Explained
Alientech has rolled out a 2026 pricing refresh — and if you're a dealer or tuning specialist, the news is seriously in your favour. With deep savings across activation bundles and new early renewal discounts, now’s the time to rethink your KESS3 setup. {{ vc_btn: title=Shop+for+KESS3+Protocols&style=custom&custom_background=%23081b46&custom_text=%23ffffff&shape=square&size=lg&align=center&button_block=true&link=url%3A%252Fshop%252Fkess3-protocols%252F }} Multi-Activation Packages — What’s New? The new KESS3 [...]
