Ford Focus ST / RS Mk2 Ecumaster EMU Black ECU & Plug-and-Play Adaptor

The Ford Focus ST / RS Mk2 Ecumaster EMU Black ECU & Pre-Built Plug-and-Play Adaptor Kit is designed to allow the Ecumaster EMU Black ECU to connect to compatible Ford Focus ST and Focus RS Mk2 models.

This kit includes an Ecumaster EMU Black standalone ECU and a pre-built, ready-to-fit plug-and-play adaptor, giving you advanced programmable engine management without the usual wiring work associated with a full standalone ECU installation.

The adaptor is designed to retain full dash functionality, making it a clean plug-in solution for customers wanting more tuning control, motorsport features, and flexibility from their Focus ST / RS Mk2 while keeping the vehicle interior systems working as intended.

Key Features

Designed for Ford Focus ST / RS Mk2
Suitable for compatible Ford Focus ST Mk2 and Ford Focus RS Mk2 applications.

Ecumaster EMU Black ECU Included
Supplied with the Ecumaster EMU Black standalone ECU for advanced programmable engine management control.

Pre-Built Plug-and-Play Adaptor Included
Supplied as a complete, ready-to-fit adaptor, not loose connectors and wires.

Factory Dash Functionality Retained
Designed so all dash features remain fully functional where correctly installed and configured.

Uses the Factory Vehicle Loom
Allows the EMU Black ECU to connect to the compatible factory Ford wiring loom, reducing the need for a full custom rewire.

Standalone ECU Control Without the Wiring Hassle
A clean solution for customers wanting standalone ECU control while keeping installation straightforward.

Optional Bosch LSU 4.9 Lambda Upgrade
A Bosch LSU 4.9 wideband lambda sensor and matching connector can be added as an optional extra if required.

Ecumaster EMU Black Specification

The Ecumaster EMU Black is a powerful standalone engine management system designed to control advanced fuel, ignition, boost, and auxiliary strategies on a wide range of engines.

Key EMU Black features include:

• Built-in 4 bar MAP sensor
• Built-in wideband lambda controller
• Bosch LSU 4.2 and LSU 4.9 wideband sensor support
• Drive-by-wire throttle control support
• Flex fuel support
• CAN bus communication
• Advanced boost control strategies
• Launch control
• Flat shift
• Traction control strategies
• Motorsport data logging
• Knock control support
• Configurable inputs and outputs
• Closed-loop fuel control
• Closed-loop boost control
• Support for staged injection and advanced ignition strategies
• Windows-based tuning software

Optional Lambda Upgrade

An optional Bosch LSU 4.9 wideband lambda sensor and matching connector can be added to this kit if required.

Adding the lambda option allows the Ecumaster EMU Black to use wideband lambda feedback for accurate air/fuel ratio monitoring and closed-loop fuel control, making it a useful upgrade for tuned Focus ST / RS Mk2 builds.

Kit Includes

• 1 × Ecumaster EMU Black standalone ECU
• 1 × Ford Focus ST / RS Mk2 pre-built plug-and-play adaptor

Optional Extras

• Bosch LSU 4.9 wideband lambda sensor
• Matching lambda connector
• Additional sensors or wiring by request

Suitable Applications

• Ford Focus ST Mk2
• Ford Focus RS Mk2
• Compatible Ford Focus ST / RS Mk2 standalone ECU conversions
• Turbocharged Focus performance builds
• Fast road cars
• Track cars
• Motorsport builds

Important Notes

• Please confirm vehicle model, year, engine, and ECU connector before ordering
• This listing is for the Ecumaster EMU Black ECU and plug-and-play adaptor kit
• Supplied with a pre-built, ready-to-fit plug-and-play adaptor, not loose connectors and wires
• Dash functionality depends on correct installation, wiring compatibility, and ECU configuration
• Bosch LSU 4.9 wideband lambda sensor and connector are optional extras and are not included unless selected
• Professional installation and mapping are strongly recommended
• A base map may require adjustment before use
• Final calibration should be carried out by a qualified mapper
• Some factory functions depend on vehicle specification, wiring, and final ECU configuration
• Some features may require additional wiring, sensors, or modules

Lead Time Note

Please note there may be a 5–7 working day lead time if the adaptor needs to be built to order. We will confirm availability and build status after purchase where required.

Motorsport Use Notice

This product is intended for motorsport, competition, and off-road use where permitted. Please ensure the product is suitable for your intended application and complies with any relevant rules, regulations, or emissions requirements before use.