E46 330 325 Emtron kit
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Packages starting from $5295.00. Please email to discuss your application - packages are built to order.

10.00 LBS

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For uncompromised control and flexibility of your M54 powered e46 BMW .. 

The BMW M54 engine (found in E46 cars from 2001-2006) is an excellent powerplant and great for engine swaps as well as forced induction applications.  ACE Performance is an expert in E46 M54 engine controls.  The Emtron KV8 plug in kit allows for a install and control a robust engine management solution.  

ACE utilizes a Emtron KV8 engine control system and custom (proprietary) patch harness to connect the ECU to the BMW M54 factory engine harness as the base of this kit and has developed a number of solutions to ensure that all systems will operate as if being controlled by the factory engine management.  The ACE M54 ECU kit unit will come with a ACE supplied base calibration for this system and support your local tuning shop with the final dyno calibration (performance tuning).    


Package Contents: (Package is built to order  - on average it will be assembled and shipped 2 weeks after purchase)

Emtron KV8 ECU

ACE Wire Harness Adapter - Connects ECU to OEM BMW S54 Wiring harness ecu connector

2X Bosch (OEM Brand) Ignition Modules

2X Bosch LSU 4.9 Wideband Oxygen Sensors

GM 1 bar MAP sensor (LS1)


Product Description:

Enjoy full Emtron features and functionality in this fully condensed packaged system from ACE Performance.  

“Finally a fully complete programmable motorsport electronics package for the M54.  No falsely advertised features that are not actually supported, vague feature lists, or other bait and switch ploys”

Support for nearly all factory sensors/components/outputs unlike other systems (see details below).  Electric throttle, Idle air bypass control, VANOS, Sport switch/LED, MAF, CAN BUS integration (see below), and more.  Utilizing the open and unlocked flexible Emtron platform that offers real support anywhere in the world though its world class dealer network


- Plug in style installation - 

  • Install ECU, ignition modules, and Wire Harness adapter in factory EBox

  • Route and connect GM MAP sensor connector into engine bay

  • Route O2 harness and install new Bosch LSU 4.9 Oxygen Sensors

  • Reconfigure vacuum lines to factory fuel pressure regulator and install MAP sensor

  • Configure ECU for first start up (using ACE start up guide)

  • Tune engine

Customizing Installation:

Nearly all factory inputs and outputs are supported and connected via ACE Wire Harness adapter.  Nearly all sensor inputs and outputs are populated to run factory components.  

Inputs and outputs can then be repurposed depending on the installation requirement by substituting the old input pin with the new sensor input.



  1. If radiator temperature sensor, MAF, or other inputs are not needed, then the input can be repurposed for a Fuel Pressure sensor input.  

  2. If a real oil pressure sensor is being installed, the factory oil pressure switch input can be repurposed.

  3. If the factory oil level sensor input is not being used (not currently supported), then this input can be repurposed for a conventional oil temperature sensor.

  4. If a boost solenoid output is required for closed loop boost control, and the Purge Valve is not being used, then the output can be repurposed.


A special 5V and Sensor Ground plug on the adapter allows analog 0-5V inputs easily to be installed.  


CAN BUS Support:

Emtron ECU system supports two seperate CAN networks.  


CAN Channel 1

This network is dedicated to Emtron expansion devices, dash loggers, and other Motorsport systems.  It is pre-configured and pre-wired to connect directly to the Emtron ELC2 Dual CAN Lambda Controller.  Termination for this bus is facilitated via an external resistor that can be unplugged and used to easily expand to other CAN devices.  This location allows connection of other CAN bus friendly devices to expand on this compact package as well, especially with products like Emtron EIC, Emtron EGT, and more.


CAN Channel 2

This is connected to the factory vehicle network.  This drives some of the factory instrumentation for the E46 platform and also picks up CAN data like wheel speed inputs, AC switch position, AC pressure, and more.  These inputs can all be used for ECU functions running factory systems (like AC), but also can configure advanced ECU functions like Emtron Motorsport Traction Control/Launch Control/etc.  Advanced motorsport functions in the Emtron ECU platform are fully unlocked and available for complete configuration on demand.  

This network also is flexible as you can export comprehensive data to a data logger on this network as well if needed.

* Some installations already have Dash/Loggers attached to the factory network


Unsupported features:

  • Factory DSC functionality (ABS stays functional)

  • DMTL Tank Leakage Detection

  • Oil Temperature gauge reports Coolant Temp (future update possible)

  • M3 Cluster Shift Lights (future update possible)

  • Factory Oil Level/Temperature sensor (future update possible)

  • Factory Oxygen Sensors (replaced with Wideband Bosch 4.9 sensors)

  • Cruise Control 

  • Factory SMG transmissions



  • Dual Wideband Oxygen Sensor input with Short and Long term adaptations

  • Individual Cylinder Knock detection with Short and Long term adaptations

  • Calibration slot control (Map switching)

  • Advanced Fuel and Air mass modeling (MAF is also supported)

  • Full E-throttle control with Idle Air bypass for smooth drivability

  • Engine DTC protection/limps/failsafes (pressures, temps, etc)

  • Comprehensive ECU logging (up to 500hz per channel)

  • Launch control, Motorsport Traction control (with G-force compensation) - Best coupled with an Emtron 10 Position Rotary Switch – Small Knob

  • Customize CAN transport and receive to expand, data log, display, etc

  • True Flex Fuel function (Variable Stoich) - Requires additional hardware

  • Fuel Pressure compensation - Requires additional hardware

  • True closed loop Sequential Gear Cut/Gearshift control - Requires additional hardware


ACE Performance products are sold for off-road use only. All performance modifications and installations are at the customers own risk. ACE Performance Products LLC or hold no responsibility either implied or otherwise for mechanical, electrical or other failure when using any aftermarket products. Items sold for off-road use only are illegal in many states and are intended for racing vehicles which may never be used on a public road.

By purchasing any aftermarket product, the customer takes full responsibility for any use, and/or misuse of the product and agrees that ACE Performance Products LLC or holds no responsibility for any consequences, legal, or other, of such use and/or misuse.

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Shipping & Returns

Returns Policy
If you are not satisfied with any purchase made with Ace Performance, notify us within thirty-six (36) hours of receiving the package. Items may only be returned if they differ from what you ordered (ie. we shipped the wrong part to you) or you suspect there may be a defect with an item. Fitment issues (ie. you ordered the wrong part) are not a valid reason to return an item, and no refund requests due to fitment issues will be honored. To return an item incorrectly shipped to you, or that you believe to be defective, you must obtain a Return Merchandise Authorization Number (RMA #). The goods must be returned within ten (10) days in the same condition and in the original packaging. If the merchandise is damaged, or not in the original packaging, or no valid RMA # appears on the outside packaging, no refund will be forthcoming and you own the original purchase. The customer will be responsible for all shipping charges.

Electronic items are subject to engineering inspection prior to a refund being issued. All electronic items are carefully tested and inspected prior to sale. All items sold by Ace Performance are new unless otherwise specified.

If you believe a product you receive from Ace Performance has any defect, please contact us immediately. In the unlikely event that any issue should arise with your purchase, we are very motivated to locate and resolve the cause of the problem. If a manufacturing problem has occurred, we will investigate the part once it is returned to us, and then check with the manufacturer. If a defect is determined, the defective part will be replaced at no additional cost to you, or if you prefer, we will provide a full refund.

We ship throughout the US. Note that there are restrictions on some products, and some products cannot be shipped.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.