Original ALIENTECH KESS V3 KESS3 ECU and TCU Programming via OBD Boot and Bench Replace Kess V2 Ktag Free 1 Year Update

Check KESS3 Vehicle List

KESS3 provides users with a quick and simple interface to any engine control unit and automatic gearbox on the market.

Product Highlights:

1. All in One-OBD, Bench and Boot Mode. 
KESS3 combines 3 operating modes in one tool. OBD, Bench and Boot Mode. Configure it according to your needs and your work. Whatever your level and experience in remapping, KESS3 gives you the best.

OBD - With the OBD mode, you can easily access all the ECU data through the diagnostic socket. 
BENCH - A simple interface to the connector and you have complete access to the data of your ECU.
BOOT - This mode allows you to access all system data areas. Read, Write and Clone.

2. The CPU 
The most powerful microprocessor on the market. 7 times more powerful than the previous generation. Pure power that can execute your commands reliably, faster and more efficiently.
 
3. Lines of Communication
KESS3 automatically and instantly recognizes the right communication line, to work faster, using only an OBD cable. Ethernet, FlexRay, CAN Bus, K-Line, L-line, J1850, J1708.
All the essential lines to start any operation inside the vehicle in total safety.
 
4. Projected towards the Future.
GPS, Accelerometer, Bluetooth, and Wi-Fi. All embedded in one platform. 
The combination of these features and the constant technological developments that distinguish us will allow us to develop many new functions in the future.
 
5. High Performance
The renewed USB Full speed chip allows an up to 10x increase in the performance of importing and exporting files to and from the KESS3.
But not only that, Alientech added a new web infrastructure to the new KESS3.
The result being, an Alientech cloud with improved speed and performance.

6. Multi-language Support

Supported Language: English, Italian, French, German, Spanish, Portuguese, Chinese, Polish, Russian.

VERSIONS: Master or Slave 
The Master version can manage the SLAVE version.

The SLAVE version cannot modify files, it can only read and write files. Only the Master version can modify files.

A single flexible device that can be configured as required, when the tool is initialized, you can choose the mode of operation.
 
MASTER :The configuration that allows you to edit software calibrations in a completely autonomous way. The read files can be interpreted by your choice of remapping software.
 
SLAVE: If you are not confident yet or sufficiently autonomous in editing software calibrations, thanks to this mode you can work with a network of trainers who will support you file requirements.
 
DEALER-NETWORK: If you intend to create your own slave network of tuners, you will have a reliable and easy to use tool.

If you buy slave version and want upgrade to Master version, you can just pay for the price difference and get upgraded.

License you can buy:( You need buy any of those license to works together with your KESS V3 hardware. If you need buy more than one license, you can contact our customer service to get discounts)

When purchasing the device, at least one software protocol is required. The basic version cannot function without licenses and is not sold separately! Upon purchasing a protocol you will recieve software updates and free technical support and for a year. In the future, the subscription is renewed for an annual fee.

Kess3 Master Protocol Activations

KESS3 Master - Car - LCV OBD Protocols activation

KESS3 Master - Bike - ATV & UTV OBD Protocols activation 

KESS3 Master  Agriculture - Truck & Buses OBD Protocols activation

KESS3 Master - Marine & PWC OBD Protocols activation

KESS3 Master - Car - LCV Bench-Boot Protocols activation

KESS3 Master - Bike - ATV & UTV Bench-Boot Protocols activation

KESS3 Master - Agriculture - Truck & Buses Bench-Boot Protocols activation

KESS3 Master - Marine & PWC Bench-Boot Protocols activation 

KESS3 Master- 12 Months Subscrlptlon

KESS3 Master – 6 Months Subscription

Kess3 Slave Protocol activations

KESS3 Slave - Car - LCV OBD Protocols activation

KESS3 Slave - Bike - ATV & UTV OBD Protocols activation

KESS3 Slave - Agriculture - Truck & Buses OBD Protocols activation

KESS3 Slave - Marine & PWC OBD Protocols activation

KESS3 Slave - Car-LCV BenchBoot Protocols activation

KESS3 Slave - Bike - ATV & UTV Bench-Boot Protocols activation

KESS3 Slave - Agriculture - Truck & Buses Bench-Boot Protocols activation

KESS3 Slave - Marine & PWC Bench-Boot Protocols activation

KESS3 Slave - 12 Months Subscriptlon

KESS 3 Slave –6 Months Subscription

About KESS3 Subscriptions:

Starting from March 27, 2026, KESS3 subscriptions will fully adopt a new model.
 
All subscriptions will be standardized to a 12-month term, with only the following three types:
 
I. Pricing Structure (MASTER / SLAVE)
 
MASTER
Early Renewal → €990
Renewal → €1,190
Reactivation (if not renewed for more than 12 months) → €1,390
 
SLAVE
Early Renewal → €490
Renewal → €590
Reactivation (if not renewed for more than 12 months) → €690

No other types will exist; all cases fall under one of the three above.
 
II. Operational Logic
 
Early Renewal
The customer's current subscription is still active, and the renewal is completed before expiration.
The new 12-month term starts from the original expiration date, so the customer does not lose any usage days. This option offers the lowest price.
 
Renewal
The customer's subscription has expired but for less than 12 months.
The new term starts from the actual renewal date.
The gap between the expiration date and the renewal date will be automatically aligned by the system, with no adjustment required.
 
Reactivation
The customer's subscription has been inactive for more than 12 months.
The new term starts from the reactivation date.
This is the highest-priced option (designed to encourage customers to maintain continuous subscription).

Ktag vs Kess V2 vs Kess V3

Package Includes:

1pc x KESS3 main unit 
3pcs x adapters
1pc x power adapter
2pcs x jumpers
3pcs x cables
1pc x main cable
1pc x USB cable
1pc x DC male plug to dual alligator clip DC power cable