The tool
Your success drives our success, which is why we’re committed to equipping you with industry‑leading tools that help you get the job done right the first time. Whether you are a busy workshop, a fleet owner, or a service contractor, you can rely on the Kess3 platform – a versatile solution trusted by everyone from emerging engine enthusiasts to highly specialised mechatronic technicians. Its streamlined interface provides fast, reliable access to virtually any engine control unit or automatic transmission on the market.
KESS3 Slave tool
In stock
$ 1,600.00
The KESS3 Slave is a high-performance ECU flashing tool tailored for chiptuning professionals. Engineered to read and write ECU files prepared by a KESS3 Master, it streamlines the remapping process with a fast, secure, and intuitive interface—making precision tuning more efficient than ever.
KESS3’s Key Features:
- Effortless ECU Flashing – Enables reading and writing of ECU files provided by the Master tool for streamlined tuning.
- Automatic Checksum Correction – Validates file integrity during flashing to prevent compatibility issues.
- Guided Workflow – Built-in visual instructions simplify each step for a smooth and efficient process.
- Live Software Updates – KESS3 updates automatically whenever connected, ensuring optimal performance.
- Smart Vehicle Lookup – Instantly locate supported vehicles using the intuitive menu system.
- Real-Time Voltage Monitoring – Displays live battery voltage to maintain stability during read/write operations.
- DTC Auto-Check – Automatically scans for diagnostic trouble codes (DTCs) when writing files.
- Flashing Recovery Mode – Safeguards the ECU against disruptions during flashing, minimizing risk of damage.
Designed for automotive tuners, workshops, and performance experts, the KESS3 SLAVE is an essential tool for precision ECU remapping.
| Weight | 4 kg |
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| Dimensions | 57 × 15.5 × 44.5 cm |
We automatically assign your new KESS3 slave tool to Xtremetuning’s Master tool and sign you up for a File Service so you can start uploading jobs immediately.
To operate the Kess3 slave tool, you’ll need to configure it by selecting and adding your preferred protocol bundles from the options below. Please note that the Kess3 slave tool operates on an annual subscription basis, currently priced at NZ$1240 per year. First year’s subscription is included in tool’s price.
Backed by three decades of expertise and nearly three years of dedicated development, KESS3 represents a landmark achievement in the Chiptuning industry. It delivers a revolutionary blend of functionality, convenience, and versatility that sets a new benchmark in the market.
Engineered for everyone—from passionate car enthusiasts to advanced mechatronics professionals—KESS3 offers seamless access to virtually any engine or transmission control unit. Its powerful performance, flexible operation, and intuitive design empower users to interface effortlessly with vehicle systems using a single, all-in-one tool.
KESS3 is unique, extraordinary with no equal in the market, in terms of functions, convenience, and versatility.
All in One. OBD, Bench and Boot mode.
KESS3 integrates three powerful operating modes - OBD, Bench, and Boot- into a single versatile tool.
Configure it to suit your workflow and expertise. Whether you're just starting out or a seasoned remapping professional, KESS3 delivers top-tier performance tailored to your needs.
Renewed Architecture
Every element of KESS3 has been meticulously engineered to deliver exceptional performance, adaptability, and user-friendly operation.
Its redesigned architecture maximizes the capabilities of each component, ensuring optimal efficiency and reliability.
Innovative Design
The KESS3 features an all-new case design.
Developed through extensive research to incorporate premium, high-performance materials - adding both functional value and durability."
Alientech Suite
This cutting-edge hardware inspired the development of a completely reimagined software suite.
Redesigned from the ground up in both architecture and interface - to fully harness its capabilities.
THREE OPERATING MODES
OBD Mode
With the OBD mode, you can easily access all the ECU data through the diagnostic socket.
BENCH Mode
A simple interface to the connector and you have complete access to the data of your ECU.
BOOT Mode
This mode allows you to access all system data areas. Read, Write and Clone.
RENEWED ARCHITECTURE
Since 1991, the team has been at the forefront of ECU remapping tool development.
Fueled by a commitment to excellence, they’ve infused decades of engineering expertise into the creation of KESS3.
Every detail of the tool is purposefully crafted to deliver outstanding performance, operational versatility, and intuitive usability.
Its advanced architecture leverages the full power of cutting-edge components—including a next-generation microprocessor, high-speed flash memory, enhanced I/O interface, and integrated hardware sensors—to set a new standard in tuning technology.
INNOVATIVE DESIGN
The KESS3’s case design stands out for its innovation and durability. Developed through extensive material research, it combines rugged mobility with versatile functionality.
Its fiberglass shell offers both lightweight flexibility and ergonomic strength, built to withstand shocks and vibrations without compromising performance.
Whether you’re in the workshop or out in the field, KESS3 is engineered to keep up—built for professionals who never stop moving.
KESS3 CASE
KESS3 is built with precision and practicality in mind—every component is thoughtfully arranged for optimal workflow. Security is paramount, because your business can’t afford interruptions.
Inspired by military-grade design, the case features upper housings for organized storage, a pressure valve for safe air transport, and a snap-lock closure for maximum protection.
A built-in counter stop prevents clutter, making it ideal for tight workspaces. And when KESS3 travels, it brings everything you need—complete with essential accessories to keep you fully equipped wherever you go.
CASE CONTENTS
USB Cable – Enables direct communication between the KESS3 unit and your PC for seamless operation.
Next-Generation OBD Cable – Consolidates all communication lines used by major automotive manufacturers into a single, versatile cable. It replaces multiple legacy connections from KESSv2 and ensures compatibility with brands such as Honda, Volvo, Lotus, and Toyota.
1400SWALIM Power Supply – Delivers stable and reliable current and voltage, ensuring safe and consistent communication with electronic control units (ECUs).
144300TALI Cable – Used to power the KESS3 unit via a bench power supply (note: power supply sold separately).
144300KBNC Cable – Enables direct communication with control units during bench operations.
144300KTER Cable Pack – A complete extender kit equipped with all the essential cables required for BENCH and BOOT mode operations.
144300T104 – IDC 26-10 Cable: Features 10 wires for direct connection to the ECU’s electronic board.
144300T105 – IDC 26-16 Cable: Equipped with 16 wires, designed for direct interfacing with the ECU board.
144300T106 – IDC 26-26 Cable: Contains 26 wires, enabling full direct access to the ECU’s electronic circuitry.
KESS3 SUITE
A completely redesigned and new suite, in design and architecture
NEW DESIGN
New look, clean design, everything you need at your fingertips. Updated regularly to be functional, usable and easy.
VEHICLE DATABASE & CONTROL UNITS
List of protocols and vehicles updated daily and always available online. Technical instruction available in multi- language to support users during the most complex operations.
USER EXPERIENCE
A completely renewed UX. An intuitive dashboard with improved access to the vehicle list with the ability to create a list of favorite vehicles and a view of the history of vehicles already interfaced.
PERFORMANCE
The new interactive “search” function will allow you to access the vehicle list or search for the microprocessor of your ECU in a few seconds. Downloading and updating the list are now instant.
SUPPORT
Direct access to the this help desk and all development news
FAQ’S
How can I interface and program the control units?
With KESS3 you can program the engine control units (ECU) or transmission control unit (TCU) in three different ways:
OBD – With the OBD mode, you can easily access all the ECU data through the diagnostic socket.
BENCH – With the Bench mode you can access the ECU data directly from the connector
BOOT – With Boot mode, with the engine control unit opened, you could connect directly to all the memories of ECU/TCU.
What is a Slave tool?
The KESS3 Slave tool serves as the primary interface for dealers during the tuning process. Each Slave is paired with a Master tool, which functions as the backend system responsible for file decryption and modification. This Master tool is managed by your tuning file provider, Xtremetuning Limited.
What types of vehicles are supported?
KESS3 supports hundreds of thousands of vehicles—including not just engine control units (ECUs), but also transmission control units (TCUs) found in cars, motorcycles, tractors, trucks, and boats. For a complete overview of supported models, simply refer to our comprehensive vehicle list.
What will happen to the file that I read with Kess3?
Once you saved the ECU file onto your computer, you log into the File Service and upload it for modification. In that upload process you basically create a new job, specifying what vehicle you work on and what services you need. The tuner at the back-end will then tailor the file to your specific tuning requirements, ensuring optimal performance and compatibility.
Where can I sign up for a File Service?
To get started with our tuning File Service, simply complete the contact form above. Once we receive your information, we’ll perform a quick verification and activate your access – so you can begin working on your first tuning project right away.
News! The KESS3 tool is now available at kess3.co.nz, plus Update 3.31 released.
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New BOOT protocol for FoMoCo EEC-VI ECU – Ford and Volvo.
KESS3 further expands its coverage across a wide range of Ford and Volvo petrol vehicles.
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Thanks to BOOT mode, you can directly access the ECU installed on the long-running 2.0 and 2.3 petrol engines used from the early 2000s until the middle of the following decade.
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BOOT mode complements the already available OBD mode, allowing you to work on engine management and carry out repair operations. This provides extensive coverage and a flexible workflow across different vehicle types, from family cars to SUVs and pick-ups.
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Technical focus
Connection: BOOT
ECU: FoMoCo EEC-VI
Production years: from 2003
Brands involved: Ford, Volvo
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Supported vehicles
Ford EcoSport, Fusion USA, Galaxy, Mondeo, Ranger, S-Max
Volvo C30
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News! Tool available at kess3.co.nz + Update 3.29
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New OBD VR protocol for Continental EMS2207 ECU – Ford.
KESS3 and Powergate extend their coverage to petrol and Flex Fuel Ford Ranger pick-ups.
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Thanks to OBD mode with Virtual Reading, you can work through the diagnostic port on the Continental EMS2207 ECU, installed on 2.5-litre petrol or ethanol engines from 2012, to optimize engine response and adjust power delivery.
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The availability of OBD VR and the already supported BOOT mode allows you to select the connection best suited to your operational requirements, working either directly through the diagnostic port or with full access to the ECU.
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Technical focus
Connection: OBD VR
ECU: Continental EMS2207
Production years: from 2012
Brands involved: Ford
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Supported vehicles
Ford Ranger ...
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News! Tool available at kess3.co.nz + Update 3.30
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New BOOT protocol for Continental EMS2208 ECU – Ford.
KESS3 expands its support for Ford hybrid family cars.
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Thanks to BOOT mode, you can directly access the memories of the Continental EMS2208 ECU, installed on 2.0 Hybrid engines from 2012, to carry out complete engine management operations.
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The already available OBD mode is now complemented by the newly developed BOOT mode, providing a more flexible workflow. Professionals can select the most suitable communication mode each time, according to the vehicle and the type of operation.
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Technical focus
Connection: BOOT
ECU: Continental EMS2208
Production years: from 2012
Brands involved: Ford
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Supported vehicles
Ford C-Max, Fusion USA, Mondeo
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News! Tool available at kess3.co.nz + Update 3.28
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KESS3 further expands its coverage of the Isuzu range equipped with 2.5 and 3.0 TD engines, from 2013 onwards.
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BENCH mode provides direct access to the Transtron SH7058, L4.3, M7.3, M5 and M5S ECUs installed on Isuzu pick-ups and off-road vehicles used for work, light transport, off-road driving and heavy-load applications. Work directly on the ECU for repair operations, engine management optimization and calibration of strategies related to fuel consumption and performance.
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This update was developed to provide greater operational control, enabling precise work on the engine management of vehicles designed to tackle demanding routes, high mileage and professional use, where torque, reliability and efficiency are essential.
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Technical focus
Connection: BENCH
ECU: Transtron SH7058, L4.3, M7.3, M5, M5S
Production years: from 2013
Brands involved: Isuzu
Supported vehicles
Isuzu D-Max, Grafter, MU-X, V-Cross, N-Series
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Tool available at kess3.co.nz
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Update 3.27:
New OBD and BENCH protocols for Transtron 6XK1 and 4JXX – Isuzu heavy-duty vehicles.
KESS3 expands its coverage of Isuzu heavy-duty vehicles, from 2006 models to the most recent applications produced after 2019.
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OBD and BENCH modes make it possible to work on Transtron 6XK1 and Transtron 4JXX ECUs with two flexible and complementary workflows. OBD mode allows you to operate through the vehicle’s diagnostic port, while BENCH mode provides direct access to the ECU, making it particularly useful for repair operations and procedures that require greater operational control.
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This update was developed to support daily work on trucks, buses and commercial transport vehicles equipped with a wide range of 3.0, 5.2, 7.8, 15.6 and 15.7 diesel engines, where operational continuity, reliability and fast intervention are essential.
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Thanks to this new coverage, you can select the most suitable mode according to the vehicle’s condition and the workshop’s requirements, managing safe, accurate and repeatable procedures even on heavy-duty applications.
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Technical focus
Connection: OBD, BENCH
ECU: Transtron 6XK1, Transtron 4JXX
Production years: from 2006
Brands involved: Isuzu
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Supported vehicles
Isuzu Forward, F-Series, GigaMAX, LV 452 Bus, Novo, N-Series ...
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Update 3.26:
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Used on 690cc and 693cc engines up to 1390cc from 2025, Keihin A6264103100 ECUs are now supported in OBD mode, also with Powergate.
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A solution designed for workshops and professionals who want to offer their customers a riding experience closer to their needs, working quickly and directly on motorcycles with very different riding purposes: from sporty road riding to enduro, from supermoto to large-displacement adventure bikes.
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This new operating possibility expands intervention flexibility on the latest Husqvarna and KTM platforms, while maintaining an intuitive and accessible workflow for simplified performance management.
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Technical focus
Connection: OBD
ECU: Keihin A6264103100
Production years: from 2025
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Brands involved: Husqvarna, KTM
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Supported vehicles
Husqvarna 701 Enduro, 701 Supermoto
KTM 690 SMC R, 690 Enduro R, 1390 Super Adventure R ...
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Update 3.25:
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Thanks to these protocols, you can now choose the workflow best suited to the operation.
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KESS3 OBD mode allows you to work directly from the vehicle’s diagnostic port and also supports Powergate, while BENCH mode provides direct access to the Keihin 38770-MKC ECU directly from the connector, without opening it.
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Installed on Honda Gold Wing models with 1800cc engines from 2018, this ECU is now supported in dual connection mode: both OBD and BENCH.
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A release designed to let you work with greater flexibility on a high-end touring platform, where smoothness, engine response and delivery quality are key elements for riding comfort and intervention precision.
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Technical focus
Connection: OBD, BENCH
ECU: Keihin 38770-MKC
Production years: from 2018
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Brands involved: Honda
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Supported vehicles
Honda Gold Wing ...
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Update 3.24:
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Used on engine sizes from 660cc up to 1100cc from 2020 to today, Marelli 11MP ECUs can now also be managed in BENCH mode, in addition to the already supported OBD and BOOT modes.
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With this update, KESS3 enables direct access to the ECU from the connector, without opening it.
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A fast, complete and controlled solution, designed to work on ECU data with greater operational simplicity, while maintaining a reliable workflow at every stage of the job.
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This new connection is particularly useful on Aprilia sport and high-performance models, where electronic management requires precision, control and full access to the ECU working parameters.
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At the same time, it extends operational flexibility to the latest Moto Guzzi applications, designed for road, touring and dynamic use.
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Technical focus
Connection: BENCH
ECU: Marelli 11MP
Production years: from 2020
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Brands involved: Aprilia, Moto Guzzi
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Supported vehicles
Aprilia RS 660, RSV4 1100, Tuareg, Tuono 660, Tuono 1100
Moto Guzzi Stelvio, V100, V7, V85 ...
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Update 3.23:
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Installed on 1.8 and 2.0 TSI and TFSI EA888 turbo petrol engines from 2010, Continental SIMOS18.X ECUs can now also be managed in BENCH mode, in addition to the already supported OBD and BOOT modes.
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With this update, KESS3 enables direct access to the ECU from the connector, without opening it (after the first unlock in BOOT mode).
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A fast, controlled solution designed for everyday workshop needs, for both repair operations and performance optimization.
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This new operating possibility is designed to provide greater flexibility when working on widely used VAG platforms, from sporty compact cars to high-performance SUVs, while maintaining a reliable and repeatable workflow throughout every programming phase.
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Technical focus
Connection: BENCH
ECU: Continental SIMOS18.X
Production years: from 2010
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Brands involved: Audi, Porsche, Seat, Skoda, Volkswagen
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Supported vehicles
Audi A4, A5, A6, Q3, Q5, Q7, S1, S3, TT, TTS
Porsche Macan
Seat Ibiza, Leon Cupra
Skoda Octavia RS, Superb
Volkswagen Beetle, Golf GTI, Golf R, Jetta, Passat, Polo GTI, Sagitar, Scirocco, Sharan, Teramont, Tiguan, Vento ...
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