What is the difference between KESS3 Master and KESS3 Slave?

The hardware is the same — the difference is the licence. A KESS3 Master reads and writes open files you can edit yourself or send to any file provider, and can be linked to its own network of Slave tools. A KESS3 Slave works with encrypted files that are processed by the Master tool owner it is linked to — your file provider.

Should I buy KESS3 Master or KESS3 Slave?

Choose Master if you want full control of your tuning files or plan to supply other tuners. Choose Slave if you want a lower-cost route in, working with a trusted Master file provider. Our KESS3 Slave packages linked to Regal Tuning start from £1,100 all-in, and you can compare both routes with our Build Your KESS3 configurators.

Can KESS3 program both ECUs and TCUs?

Yes — KESS3 covers engine control units and transmission control units, subject to protocol support for the specific unit and the activations on your licence.

Does KESS3 support OBD, Bench and Boot?

Yes, all three connection methods are built into the same device. Which method applies depends on the specific ECU or TCU and protocol — not every unit supports every method, so coverage should be checked for the vehicles you work on.

What vehicles does KESS3 cover?

KESS3 activations are grouped by vehicle type: Car/LCV, Bike/ATV/UTV, Agriculture/Truck/Bus and Marine/PWC, each available as OBD or Bench + Boot packages. Exact coverage depends on the protocol for the specific ECU or TCU — contact us with your typical vehicles and we'll confirm before you buy.

What happens if I buy a KESS3 Slave linked to Regal Tuning?

Your KESS3 Slave is supplied linked to Regal Tuning as your Master. You read the vehicle with your tool, submit the file to us, and receive a professionally developed calibration back through our tuning file service — backed by our technical support team.

Can I get a KESS3 Slave for a different Master?

Yes — if you already have a chosen Master provider, use our Build Your KESS3 Slave configurator to put together the hardware plus the activations you need, ready to link to your Master.

Can I add more activations to my KESS3 later?

Yes. KESS3 is modular — you can start with a single vehicle-group activation and add further protocol packages later as your workload grows. Contact us for upgrade pricing on the activations you need.

Do I need an active subscription?

It depends on the package. KESS3 update subscriptions are available in our range — what is included varies by package and can change over time, so check the specific product or ask us before ordering.

How much does a KESS3 cost?

KESS3 is priced as hardware plus activations: the hardware base is £500 and each activation package is priced separately, so you only pay for the coverage you need. Our ready-made KESS3 Slave packages linked to Regal Tuning start from £1,100 all-in, and the configurators show live totals as you select activations.

Is KESS3 better than KESSv2 or K-TAG?

KESS3 is the successor to both — one device instead of two, with faster hardware, a single software platform and ongoing Alientech development. New protocols are developed for KESS3, making it the sensible choice for new professional setups.

Alientech KESS3 Master & Slave Tools UK

Q: What is Alientech KESS3?

KESS3 is Alientech's latest-generation ECU and TCU programming tool. It combines the heritage of KESSv2 (OBD programming) and K-TAG (bench and boot programming) into a single device with one software platform, covering cars, LCVs, bikes, agriculture, truck, bus and marine applications depending on the activations you choose.

What is Alientech KESS3?

Three programming methods, one device

KESS3 reads and writes engine and transmission control units through OBD, Bench and Boot connections in a single tool. Exact functions and vehicle coverage depend on the specific ECU or TCU, the protocol, and the activations you select.

OBD, Bench & Boot in One Tool

One compact interface covering OBD programming through the diagnostic port, Bench work on the ECU or TCU, and Boot mode access — no separate tools needed.

ECU & TCU Coverage

Reads and writes engine and transmission control units across a continuously expanding protocol database.

Wide Vehicle Coverage

Cars and LCVs, bikes and ATVs, agriculture, truck and bus, and marine applications — depending on the activations you select.

Fast, Stable Communication

A newer, faster hardware generation built for daily workshop use — quick reads, stable writes and automatic checksum handling where supported.

Modular Activations

Pay for the protocols you actually need — hardware plus your choice of vehicle-group activations, expandable later as your work grows.

KESSv2 & K-TAG Successor

KESS3 replaces both KESSv2 and K-TAG with a single device, one software platform and ongoing Alientech development.

Coverage note: not every vehicle supports every programming mode. Tell us the vehicles you work on and we'll confirm KESS3 coverage before you buy.

KESS3 Master vs KESS3 Slave

Same hardware, two ways to work

Independence

KESS3 Master

KESS3 Master is intended for professional tuners who want control over their tuning files. Master tools read and write open files — edit them yourself with compatible calibration software, or send them to any file provider you choose.

A Master tool can also be linked to its own network of KESS3 Slave users, letting you supply other workshops and grow a dealer network under your own brand.

Build Your KESS3 Master

Supported

KESS3 Slave

KESS3 Slave is designed for workshops and tuners who work with a chosen Master file provider. Slave files are encrypted, and file modification is handled by the Master your tool is linked to — you read and write the vehicle, your Master supplies the calibration.

Choose a KESS3 Slave linked to Regal Tuning and you combine the hardware with our professional ECU tuning file service and technical support — developed in-house and verified on our 4WD dyno.

View Regal KESS3 Slave Packages

Programming Methods

OBD, Bench & Boot explained

Three ways to reach the control unit — all in one device. Which method applies depends on the specific ECU or TCU and protocol.

01

OBD

Programming through the vehicle's diagnostic socket — the fastest method for supported vehicles, with no need to remove the control unit.

02

Bench

Direct connection to the ECU or TCU on the bench without opening the unit — deeper access than OBD for supported protocols.

03

Boot

Low-level access with the control unit open, used on supported units for programming, backup, recovery and cloning-style operations.

Vehicle Compatibility

KESS3 Vehicle Compatibility

Check whether your vehicle, ECU or TCU is covered by KESS3 — search by make, model, engine, ECU and see the available connection methods (OBD, Bench, Boot). Compatibility data comes from the official Alientech vehicle database; exact coverage depends on the control unit and activations.

Vehicle Type

Make / Brand

Model

Fuel

Model Year

ECU Manufacturer

Connection Mode

34,419 matching applications

View KESS3 Packages

Vehicle	Engine	Fuel	Power	Year	ECU / TCU	Connection
AJP Motos PR5 Bike · 250	NC250 ZONGSHEN	Petrol	20 kW	2018	Delphi MT05.2ECM	BENCHOBD
AJP Motos PR5 Bike · 250 Extreme	NC250 ZONGSHEN	Petrol	20 kW	2018	Delphi MT05.2ECM	BENCHOBD
AJP Motos PR7 Bike · 650 Adventure	RS650R SWM	Petrol	35 kW	2018	Delphi MT05.2ECM	BENCHOBD
AJP Motos PR7 Bike · 650 Adventure	RS650R SWM	Petrol	27 kW	2018	Delphi MT05.2ECM	BENCHOBD
AJP Motos PR7 Bike · 650 Off-Road	RS650R SWM	Petrol	35 kW	2018	Delphi MT05.2ECM	BENCHOBD
AJP Motos PR7 Bike · 650 Rally	RS650R SWM	Petrol	35 kW	2018	Delphi MT05.2ECM	BENCHOBD
ARGO Sherp Series Tractor · Pro XT 1.8L	D18 Doosan	Diesel	41 kW	2020	Bosch EDC17C87 · TC1793ECM	BENCH
ARIEL Atom 4 Car · 2.0 16v i-VTEC Turbo Type-R	K20C1 Honda	Petrol	239 kW	2018	Bosch MED17.9.3 · TC1793ECM	BENCHBOOT
ARTEGA GT Coupé Car · 3.6L VR6 6AT	BHK VW Group	Petrol	220 kW	2009	Bosch MED9.1ECM	BENCHBOOT
Abarth 124 Spider Car · 1.4 16v MultiAir Turbo 6AT	55253268 Fiat	Petrol	125 kW	2016	Magneti Marelli 8GMK · SPC564A80ECM	BENCHBOOTOBD
Abarth 124 Spider Car · 1.4 16v MultiAir Turbo 6MT	55253268 Fiat	Petrol	125 kW	2016	Magneti Marelli 8GMK · SPC564A80ECM	BENCHBOOTOBD
Abarth 500 Car · 1.4 16v T-Jet 5MT	312 A1.000 Fiat	Petrol	99 kW	2008	Bosch ME7.9.10ECM	BENCHBOOTOBD
Abarth 500 Car · 1.4 16v T-Jet 6AT	312 A1.000 Fiat	Petrol	99 kW	2008	Bosch ME7.9.10ECM	BENCHBOOTOBD
Abarth 500 Assetto Corse Car · 1.4 16v T-Jet	312 A1.000 Fiat	Petrol	147 kW	2009	Bosch ME7.9.10ECM	BENCHBOOTOBD
Abarth 500 Assetto Corse Car · 1.4 16v T-Jet	312 A1.000 Fiat	Petrol	140 kW	2010	Bosch ME7.9.10ECM	BENCHBOOTOBD

Page 1 of 2,295

Configure Your KESS3

Hardware £500.00 + your choice of activations

Build the exact KESS3 setup you need: pick Master or Slave, then select activations by vehicle group and connection method. Live totals as you configure.

Build Your KESS3 – Master

KESS3 hardware plus your choice of Master activations — full control of your tuning files.

Hardware £500.00 + activations

Configure

Build Your KESS3 – Slave

KESS3 hardware plus Slave activations — ready to link to Regal Tuning or your own chosen Master.

Hardware £500.00 + activations

Configure

Best Value — Linked to Regal Tuning

KESS3 Slave — Regal Tuning packages

Ready-made KESS3 Slave packages linked to Regal Tuning as your Master — hardware and activation included, all-in pricing, backed by our tuning file service.

KESS3 Slave — Regal Tuning — Cars OBD

£1,100.00

View product

KESS3 Slave — Regal Tuning — Cars OBD + Bench

£1,350.00

View product

KESS3 Slave — Regal Tuning — FULL (OBD + Bench + Boot)

£3,000.00

View product

Why Buy KESS3 From Regal Tuning?

Hardware plus real tuning support

Professional ECU tuning specialists — not a box-shifting reseller

Genuine Alientech equipment, supplied configured and ready to work

KESS3 Slave packages linked directly to Regal Tuning's file service

Master and Slave routes with modular activations to suit your budget

In-house ECU tuning files, developed and verified on our 4WD dyno

Technical support from tuners with 20+ years of industry experience

New to professional tuning? Our dealer programme combines equipment, tuning files and ongoing technical support to help workshops add ECU tuning properly.

Regal Tuning File Service

Pair KESS3 with professional tuning files

Regal Tuning operates a professional ECU tuning file service for tuning businesses and workshops worldwide. KESS3 Slave customers linked to Regal Tuning submit files straight to our calibration team — and KESS3 Master users keep full independence, using us as their file provider by choice.

Upload a File Existing customer? File Portal

FAQ

Alientech KESS3 questions, answered

Ready to order? Browse the Alientech range, configure a KESS3 Master, or contact our team for advice on the right setup.

Alientech KESS3 ECU & TCU Tuning Tool

Three programming methods, one device

OBD, Bench & Boot in One Tool

ECU & TCU Coverage

Wide Vehicle Coverage

Fast, Stable Communication

Modular Activations

KESSv2 & K-TAG Successor

Same hardware, two ways to work

KESS3 Master

KESS3 Slave

OBD, Bench & Boot explained

OBD

Bench

Boot

KESS3 Vehicle Compatibility

Hardware £500.00 + your choice of activations

KESS3 Slave — Regal Tuning packages

KESS3 Slave — Regal Tuning — Cars OBD

KESS3 Slave — Regal Tuning — Cars OBD + Bench

KESS3 Slave — Regal Tuning — FULL (OBD + Bench + Boot)

Hardware plus real tuning support

Pair KESS3 with professional tuning files

Alientech KESS3 questions, answered

What is Alientech KESS3?

What is the difference between KESS3 Master and KESS3 Slave?

Should I buy KESS3 Master or KESS3 Slave?

Can KESS3 program both ECUs and TCUs?

Does KESS3 support OBD, Bench and Boot?

What vehicles does KESS3 cover?

What happens if I buy a KESS3 Slave linked to Regal Tuning?

Can I get a KESS3 Slave for a different Master?

Can I add more activations to my KESS3 later?

Do I need an active subscription?

How much does a KESS3 cost?

Is KESS3 better than KESSv2 or K-TAG?