Alientech KESS3

Alientech KESS3 – The next generation of tuning tools

The KESS3 is the latest ECU tuning tool from Alientech that replaces both the KESSv2 and K-TAG.

KESS3 gives you more control than its predecessors, KESSv2 and K-TAG, and can be upgraded without the need to spend money on new hardware. This new tool allows users to remap in a faster, easier way than ever before, with the ability to use both OBD or Bench Tuning methods from the same device.

The KESS 3 tool is the latest step in ECU tuning, which is faster and more powerful than its predecessors.

Alientech KESS 3

£540.00£14,320.00 VAT will be applied at the time of checkout



Alientech Kess3

Alientech Kess 3 Hardware & Protocol options. The Alientech Kess3 replaces the Alientech KESSv2 and Alientech K-Tag which have probably been the most popular tunings tools in the market over the past decade.

The new KESS3 has the ability to be activated either as a Kess3 Master tuning tool, or a Kess3 Slave tuning tool. In addition, it can be activated as either OBD, Bench / boot, or Both. So in short, the Kess3 tuning tool can offer both OBD tuning and Bench / Boot tuning from one device.

Therefore the Kess3 offers unbelievable coverage and flexibility when it comes to tuning and ECU remapping. This combined with good strong technical support and service. Very regular updates, low running costs. As well as the ability to upgrade from slave to master. Not to mention a processor 10 times faster than the one fitted to the Kess V2. All come together to make the Alientech KESS3 a force to be reckoned with.

Kess3 Master or Slave
Once you have purchased your Kess 3 hardware unit. Next you can decide to activate it as either a Slave or Master version of the tool. This is wholly dependent on the protocols you choose to add to the tuning device.

The protocols selected will confirm what vehicles can be tuned. Choose from Motorbikes, Cars, Agricultural vehicles / Trucks, And Marine tuning applications.

Kess 3 OBD, Boot / Bench tuning options
In addition, each of the vehicle groups available can be chosen as OBD protocols, or Boot / Bench tuning protocols. Or of course you can select both for deeper and more flexible tuning coverage.

All of the protocol packages can be seen in the VIEZU online Kess3 shop. And if you are not sure, have any questions. Or would appreciate any guidance, the support team are on hand to help.

Kess 3 Slave configuration
Each Alientech Kess3 unit with a purchase of Slave protocols, must have a KESS3 Master. It is the Master that will provide your tuning files, software, and day to day support. If you don’t have a Master you want to use for your remap file. Paramount will be very happy to assist. Offering live, custom and bespoke tuning 7 days a week.

Alternatively, if you do have a master tuning file provider ready to support, you please confirm the details of the master account number you would like to use with your new Kess3 slave. And we will make sure this is in place prior to shipping / collection. Find out more about becoming a VIEZU Dealer and starting a tuning business here

Kess3 Tax Free – Worldwide Shipping
VIEZU have all Alientech tuning tools, software and accessories in stock ready to ship. If you are outside of the UK, the sale is UK tax free. And the team can arrange fast direct worldwide shipping. And with protocols you pay no import duty or tax on the software and Kess3 activation.

Kess3 training and Support
All Alientech sales come inclusive of training, set up, and support. The technical support team is on hand to ensure you get the very most form your new tuning tool.

VIEZU is one of the biggest tuning tool sellers in the world, and while some tuners will just tell you about the tool, we can show you.  We offer a FREE demonstration of the tool to make sure you have a full understanding of how to use the KESS3 and the things you need to run a tuning business, at our HQ and workshop here in Warwickshire. So you can be certain that we are commited to ensuring you get exactly the tool you want with the skills to make your business a success. For even more training you can sign up to our range of FREE and paid courses at the VIEZU Technical Academy

Additional information

Weight 10 kg
Dimensions 65 × 50 × 45 cm

Hardware Only, Hardware & Protocols


Slave, Master, None


OBD only, Bench & Boot only, OBD Bench & Boot, None

Vehicle Protocols

Car & LCV, Car & LCV + Bike, Car & LCV + Bike + Truck & Agri, Car & LCV + Bike +Truck & Agri + Marine, Car & LCV + Truck & Agri, Car & LCV + Truck & Agri + Marine, Car & LCV + Marine, Car & LCV + Bike + Marine, Bike, Bike + Truck & Agri, Bike + Truck & Agri + Marine, Bike + Marine, Truck & Agri + Marine, Marine, Truck & Agri, None


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KESS 3 Features

Fast Interface

The speed of the interface is faster than any previous Alientech program. Opening in ready to tune a vehicle in just a few seconds!

All In One Tool

The Kess3 contains all of your OBD / Bench and Boot tuning hardware in one simple to operate the device. There is no need for an additional tool, or plug in extra modules into the Kess3 to enable BOOT or BENCH tuning. Simply pick the cables you need and get tuning.


Protocols are sold separately, so there is no need to purchase packages you don’t want. And new protocols can be added at any time. So a Kess3 that is only OBD active, can have bench/boot protocols added straight away. Meaning you don’t miss out on work where new or different protocols are required.

Bench & Boot

Bench and Boot protocols are available to purchase individually. And by vehicle type for the first time. (Not sold by ECU manufacturer). Hence making the tool set up much more specific, and cost-effective to your requirements.

Light Speed

The brand new Kess3 takes advantage of some of the latest and greatest technology available to provide an incredibly fast reading and writing to both ECUs and TCUs, this means less time connected to the vehicle and means a faster turnaround remap you are carrying out.

Alientech Suite

The “Alientech Suite” program, which runs the Kess3, is an all-in-one program. No complex menus to navigate through. Select the vehicle you want to tune from the main home screen, select the method “OBD” / “bench – Service mode” / “Boot – Direct to ECU Circuit board”, then you can read and write.

Clear instructions

Clear instructions are now presented to you before you proceed to the reading/writing screen when using Kess3. This prevents you from missing vital instructions and keeps you fully updated with the knowledge to complete the tuning safely.

Quick Search Filters

Quick filters to find the vehicle. No need to follow the drop-down menus in a long-winded order. You can now fast travel to the options you want. Filter by ECU or TCU – DONE! Filter by fuel type – DONE! It’s the easiest and simplest tuning interface in the marketplace.

Built For The Real World

The new Kess3 has a protective rubberised layer around the outer edge of the tool to absorb shocks and bumps when its being used in real environments such as garages and “in the field” mobile tuning. Complete with none slip feet for added safety when working on a vehicle.

Upgraded Cable Set

The new Kess3 cable set is so easy to use and comes with all the additional GPT style cables in the same simple to use plug and loom as the main power/earth, CAN high / CAN low and kline loom.

Warp Speed Checksum Calculations

No more waiting around endlessly for checksums to calculate. The new processing power of the Kess3 crunches the data faster than any tool that came before it.

KESS 3 Logo

Here are the 6 top highlights…

1. You no longer need separate tools for OBD and Bench Tuning.  With the new KESS3, this is now a combined feature.

2. Greater choice and granularity with new Protocols Packs:

– Car – LCV

– Bike – ATV & UTV

– Agriculture – Truck & Buses

– Marine & PWC

3. Lightning quick reads and writes with advanced processing speeds, means  Warp speed checksum calculations.

4. KESS V2 Cables are transferable – no need to  buy new cable sets

5. Bench and Boot protocols are now available to purchase individually

6. Service mode – greater coverage; no need to open the ECU to perform bench tuning anymore on a greater selection of ECU types

How does the KESS3 compare?


KESSv2 Tuning Tool

✔️ OBD Tuning

❌ Bench/Boot Tuning

❌ Upgradable from Slave to Master

❌ Separate Car & Bike Protocols

Uses K-Suite

Standard Cable Set

Standard Speed Checksum Calculations


❌ OBD Tuning

✔️ Bench/Boot Tuning

❌ Upgradable from Slave to Master

❌ Separate Car & Bike Protocols

Uses K-Suite

Standard Cable Set

Standard Speed Checksum Calculations


✔️ OBD Tuning

✔️ Bench/Boot Tuning

✔️ Upgradable from Slave to Master

✔️ Separate Car & Bike Protocols

✔️ Works with some existing KESSv2 cables

⭐ Uses Alientech Suite

⭐ Upgraded Cable Set

⭐ Superfast Checksum Calculations

⭐ 10x Faster Processing


All in One
OBD, Bench and Boot mode

The KESS3 tool combines three modes of operation. The first is OBD, the second is Bench, and the third is Boot.

Select the settings that fit your work requirements. KESS3 gives you the best remapping experience no matter your level and experience. This text was copied from

Alientech Kess3

Renewed architecture

KESS3’s design is targeted at achieving performance, operational flexibility, and user-friendliness.

Each component of its architecture is made to perform at its maximum potential.
This text was copied from

Kess3 American

Innovative Design

KESS3 case design is completely new. The KESS3 tool combines three modes of operation. 

Researchers at Alientech have incorporated the best usable materials to provide added value.

Select the settings that fit your work requirements. 


Alientech Suite

A new hardware platform so powerful inspired Alientech to design software that could take full advantage of its potential.

A completely redesigned software solution is now available. KESS3 gives you the best remapping experience no matter your level and experience.

HUGE SAVINGS if you trade in your Old Alientech tools

If you’re an existing KESS or K-TAG customer, you might be wondering what to do, especially if you’ve just renewed your subscriptions.


Existing Alientech customers are eligible for discounts of up to 95% by trading in their old KESSv2 and/or K-TAG.

Once you let us know what subscriptions you already have and the subscriptions you would like to have, we’ll be able to discover your exact discount. During the launch period, the discounts will be the highest, so there is no better time to upgrade to the all new KESS3!

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See our full KESS3 product range here

Alientech Suite VZ Logo

The Alientech Suite is a streamlined, purpose-built interface for tuners using the KESS3. Taking all the technical know-how, tuners requirements and world-leading tuning tool development, the Alientech Suite delivers the most efficient and easy to use tuning platform on the market today. Alientech Suite combines the three essential methods of vehicle tuning in one software program;

  • OBD – Connecting the vehicles on-board diagnostic port
  • BENCH – Connecting directly to the CU (Control unit) connector plugs without the need to open the ECU itself
  • BOOT – Direct connection to the  CU (Control unit) circuit board through a variety of connection methods.

Combining the 3 tuning methods into one easy to navigate software program that is open and ready to use in a matter of moments, provides all professional tuners with the efficiency and stability to tune vehicle control units with complete confidence.

Always up-to-date manuals – With the Alientech Suite, you will always have access to the latest manuals for the active protocols you are using. With the unique method of downloading the protocol you are about to use each time, the Alientech Suite provides you with not only the latest updated version of the protocol but the correct and up-to-date instruction manuals for the active protocol. Further adding to the peace of mind that the Alientech Suite is there to help you as you tune each and every vehicle you work on.

Alientech Suite kess 3
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Learn How To Tune With The KESS3

VIEZU Technical Academy | Alientech KESS3 Training

OBD Training

Learn how to use Alientech KESS3 tool from anywhere in the world by following our high-quality training videos.

When it comes to online KESS training courses, the Viezu Technical Academy is very experienced.

Bench Training

Learn how to use Alientech KESS3 Bench Tuning from anywhere in the world by following our high-quality training videos.

When it comes to online Alientech training the Viezu Technical Academy is very experienced.

Boot Training

Learn how to use Alientech KESS3 Boot Tuning from anywhere in the world by following our high-quality training videos.

When it comes to online Alientech training the Viezu Technical Academy is very experienced.

ECM Training

You can learn Alientech ECM Titanium from any location with the help of our high-quality video tutorials.

We at Viezu Technical Academy have extensive experience with online training programs for ECM Titanium software.

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