KESS3 ECU Remapping Tool
The next generation of Alientech remapping hardware. Read, write and clone ECUs, TCUs and BCMs via OBD, Boot and Bench — all from a single device.
What is the KESS3?
The Alientech KESS3 is the professional standard for ECU remapping worldwide. Designed as the successor to the legendary KESS v2, it combines OBD, Boot and Bench connectivity into one compact unit — giving technicians a single tool capable of working on virtually any vehicle on the road today.
MVRH ECU Tuning Solutions operates as a master tuner and ECU file service provider. When you work with us as your master, you handle the physical read and write at the vehicle using your KESS3 Slave, and we supply the calibrated tune file. VIEZU is one of the UK's largest Alientech tool resellers and our recommended supplier for KESS3 hardware.
Whether you are tuning a modern passenger car, a commercial vehicle, agricultural machinery or a marine engine, KESS3 provides the protocols and the reliability that professional remappers demand. Its intuitive software, regular protocol updates and robust build quality make it the go-to choice for agents and workshops throughout the UK and internationally.
Master or Slave — choose the right version
KESS3 Slave
£1650 + VAT
Protocols and Hardware included
The Slave version is designed for remapping agents who work within a master network. You read and write ECU files using your own hardware, then send the original file to your master tuner — MVRH — for the calibration work. No tuning knowledge required.
- Full OBD, Boot and Bench connectivity
- All protocols and hardware included
- MVRH acts as your master tuner and file provider
- No calibration experience needed
- Regular Alientech protocol updates
KESS3 Master
Price on application
Contact VIEZU for current pricing
The Master version gives you full autonomy to write your own calibration files. Ideal for experienced tuners who want complete control over the tuning process, with access to the full Alientech ecosystem and no dependency on a file service.
- Full read, write and clone capability
- Write your own calibration files
- Access to the full Alientech protocol library
- Suitable for experienced tuners and dyno operators
- Backed by Alientech technical support
Slave vs Master — which do I need?
If you are new to remapping, or you want to offer ECU tuning as a service without writing your own calibration files, the Slave version is the right choice. You handle the physical read and write process at the vehicle; MVRH — your master tuner — handles the calibration and supplies the tune file. It is a low-risk, low-investment way to add remapping to your workshop.
If you are an experienced tuner with your own calibration workflow and you want full independence, the Master version gives you complete control. You will need a solid understanding of ECU data structures and tuning parameters to use it effectively.
For quotes and flexible payment options on KESS3 hardware, contact Ian Armstrong at VIEZU and quote MVRH. VIEZU is a separate company and one of the UK's largest Alientech tool resellers — they handle the hardware sale, while MVRH provides your ongoing file service and master tuner support.
Why professionals choose KESS3
OBD, Boot and Bench in one device
A single tool covers the three primary connection methods, removing the need for multiple pieces of hardware on the bench.
Massive vehicle coverage
Thousands of supported ECUs across cars, vans, trucks, agricultural machinery, marine engines and more — with new protocols added regularly.
Fast and reliable reads
High-speed USB communication and a robust protocol stack mean fewer failed reads and faster turnaround on every job.
Regular software updates
Alientech continuously expands the KESS3 protocol library, keeping your tool current with the latest ECU platforms.
Compact and portable
Lightweight design makes it easy to take to the vehicle rather than bringing the vehicle to the bench.
Genuine Alientech hardware via VIEZU
VIEZU is one of the UK's largest Alientech tool resellers. Purchasing through them ensures genuine hardware, full warranty, and manufacturer support.
Ready to get started with KESS3?
Purchase your KESS3 Slave hardware through VIEZU — one of the UK's largest Alientech resellers — then use MVRH as your master tuner and ECU file service provider.
KESS3 Slave from £1650 + VAT — Protocols and Hardware included