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.
Update 3.19:
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BOOT mode enables full access to the Delphi DCM7.1P, installed on Fiat, Peugeot and RAM Trucks pick-ups equipped with 2.2 BlueHDi diesel engines from 2024. It operates directly on the ECU for advanced repair operations and optimization of engine management.
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An update developed to provide maximum operational control on vehicles designed for transport, work and intensive use, where reliability and efficiency are essential elements.
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Thanks to BOOT access, it is possible to operate with precision, optimizing engine control strategies and ensuring safe, repeatable procedures in the workshop.
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Technical focus
Connection: BOOT
ECU: Delphi DCM7.1P
Production years: from 2024
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Brands involved: Fiat, Peugeot, RAM Trucks
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Supported vehicles
Fiat Titano
Peugeot Landtrek
RAM Trucks 1200 ... See MoreSee Less
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Update 3.18:
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Thanks to BENCH mode, it is now possible to access the Bosch MD1CS018 directly without opening the ECU, operating through a direct connection from the ECU connector.
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An update designed to simplify electronic maintenance and repair operations, ensuring fast, stable and secure access even on vehicles intended for heavy-duty and professional use.
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A solution that makes the workflow more linear and reliable in daily workshop operations, reducing operating times and improving the management of interventions on latest-generation platforms.
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Technical focus
Connection: BENCH
ECU: Bosch MD1CS018
Production years: from 2020
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Brands involved: GAZ, Mahindra
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Supported vehicles
GAZ Gazelle
Mahindra Thar ... See MoreSee Less
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Update 3.17:
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With the new BOOT support for the Continental DC4 GEN II TCU, already available in OBD and BENCH mode, you can now access the transmission electronics directly with the highest level of operability.
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The open-ECU connection allows complete and controlled operations for tuning activities, software recovery and advanced transmission management on 1.5 dCi, 0.9, 1.0 and 1.3 TCe engines from 2014 onwards.
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An advanced technical access designed to work with greater precision on shifting strategies and gearbox behaviour, maintaining full control during every stage of the operation.
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Technical focus
Connection: BOOT
TCU: Continental DC4 GEN II
Production years: from 2014
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Brands involved: Dacia, Renault, Smart
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Supported vehicles
Dacia Duster
Renault Kadjar, Megane, Twingo
Smart Forfour, Forfour Brabus ... See MoreSee Less
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Update 3.16:
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KESS3 expands coverage with BENCH mode and direct access to the Keihin 38770-MKE ECU without opening the control unit, alongside the already available connections (OBD and BOOT – available on pre-2020 applications).
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On these 250cc and 450cc configurations, which cover a large portion of today’s racing market, it is possible to precisely work on fuel management and engine strategies, optimizing performance.
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This allows power delivery to be adapted to real operating conditions, maintaining consistency between engine setup and vehicle dynamics in MX/enduro applications.
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Technical focus
Connection: BENCH
ECU: Keihin 38770-MKE
Production years: from 2017
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Brands involved: Honda
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Supported vehicles
Honda CRF 450 R, CRF 450 RL, CRF 450 L, CRF 450 RX, CRF 250 R ... See MoreSee Less
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Update 3.15:
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The KX 250 F and KX 450 F series represent a well-established reference in the motocross and enduro racing world.
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With the introduction of BENCH mode, direct access to the Keihin 21175-11XX ECU is now available without opening the control unit. OBD and BOOT connections are already supported, now completing all operational possibilities on the ECU.
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In the workshop, this means being able to work on maps with a fast and non-invasive workflow, adapting engine behavior to track requirements.
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Technical focus
Connection: BENCH
ECU: Keihin 21175-11XX
Production years: from 2014
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Brands involved: Kawasaki
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Supported vehicles
Kawasaki KX 450 F, KX 250 F ... See MoreSee Less
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The Desmo 450 introduces a completely new configuration for off-road racing, with a 450cc Desmodromic engine designed to deliver immediate response, high performance and maximum control in the most extreme conditions.
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Thanks to BOOT mode, it is possible to directly access the Keihin 6001-2934-000 ECU and operate completely on engine management. The operation is carried out on the bench, with direct access to the control unit for structured and safe procedures.
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In racing applications, this means being able to work on engine parameters and strategies with the highest level of control, optimizing power delivery according to track conditions, grip and riding style.
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This represents the first step in a series of developments dedicated to the latest-generation motocross and enduro segment.
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Technical focus
Connection: BOOT
ECU: Keihin 6001-2934-000
Production years: from 2025
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Brands involved: Ducati
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Supported vehicles
Ducati Desmo 450 ... See MoreSee Less
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One of the most widespread platforms in the sector is now manageable directly via the diagnostic port.
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With the release of the dedicated protocol for Bosch MD1CS069 ECUs, installed on 2.9, 3.4 and 3.6 Stage V engines from 2017 onwards, it is now possible to operate in OBD mode without invasive procedures on the control unit.
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A practical solution for professionals working daily on these vehicles, where time and downtime directly impact productivity.
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This translates into real advantages for workshops and field operations:
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direct access via diagnostic port with cable 144300K226
fast operations without disassembly
continuous vehicle operability
Once connected in OBD, you can perform reading and writing in a simple and linear way, optimizing repair operations and improving performance to handle even the most demanding tasks.
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Technical focus
Connection: OBD
ECU: Bosch MD1CS069
Production years: from 2017
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Brands involved: Case IH, Claas, Komatsu, Landini, Massey Ferguson, McCormick, New Holland, Steyr
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Supported vehicles
Case IH A Series
Claas Elios, Nexos
Komatsu Backhoe Loaders
Landini 5 Series
Massey Ferguson MF 3
McCormick X5, X6
New Holland T4 Series, T5 Series
Steyr Kompakt ... See MoreSee Less
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Development dedicated to the motorcycle segment continues with the introduction of BENCH mode support for Delphi MT05.2 ECUs, installed on a wide range of models with engines from 250cc to 800cc from 2015 onwards.
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In addition to the already available OBD connection, this update expands operational possibilities, offering BENCH access, enables full ECU management, improving precision in repair operations and ensuring reliable processes even for performance development.
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Technical focus
Connection: BENCH
ECU: Delphi MT05.2
Production years: from 2015
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Brands involved: Aeon, AJP Motos, Benelli, Quadro
Supported vehicles
Aeon Cobra, Crossland
AJP Motos PR5, PR7
Benelli BN
Quadro Steinbock ... See MoreSee Less
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The development dedicated to the ATV segment expands with the introduction of BENCH mode for Mitsubishi 2UD-8591A-00 ECUs, installed on Yamaha models with 700cc engines from 2016 onwards.
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This new protocol enables direct access to the control unit, operating directly from the ECU connector, ensuring greater reliability during read and write phases and improving the precision of interventions for maintenance and performance development.
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Technical focus
Connection: BENCH
ECU: Mitsubishi 2UD-8591A-00
Production years: from 2016
Brands involved: Yamaha
Supported vehicles
Yamaha Grizzly, Kodiak ... See MoreSee Less
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