Scratch & Dent Open Box Item:

May include light scratches. Fully functional and inspected. Final sale — no returns or exchanges.

With the MS3Pro PNP EMS, we've simply taken all of the wiring homework and labor out of the project for you. Allows you to tune your BMW with a laptop to handle any mods you can throw at the OBD2 M52 and S52! We provide you with a solid base map to tune from to make your installation and tuning process go incredibly smoothly whether you're a super technical computer-geek or just a gear-head. Now you've got no more excuses... Replace your “ Siemens MS41.x” DME with a tunable racing ECU to handle any mods you can throw at these engines!

Easy to Use and Install!

Fully Plug and Play Installation – No wiring required for basic functionality.
The ONLY aftermarket M52 ECU on the market that supports the stock BMW camshaft position sensor – NO Hall sensor retrofit needed!!!
Maintains functionality of the factory ACS+T traction control system
Maintains functionality of the factory Econometer/MPG gauge on the dashboard
Base map is pre-loaded to help your engine start on the first turn of the key
Real time tuning and data logging with a laptop connection
8 GB internal data logging with built in SD card
Supports most aftermarket wideband sensors

Fully Tunable Engine Control!

16×16 Fuel Tables allow high resolution tuning
16×16 Ignition Tables
Multiple Acceleration enrichment strategies
Closed Loop Idle Speed Control
Air Conditioner Control
6 sequential fuel injector channels with individual trim tables
Onboard high impedance injector drivers
Allows removal of stock MAF sensor
VANOS control

Advanced Feature Set (Included!)

12×12 Air Fuel Ratio Target Tables for use with wide band O2 sensor for precise tuning and table trim.
Multiple traction control strategies
Built-in 3-step rev limiter / launch control with flat shift and burnout rev limiter
Time based timing / boost increase after launch
Real time barometric correction
Internal 4-bar MAP sensor reads up to 44PSI of boost
Overboost protection
Closed loop boost control (Requires DIYAutoTune.com EBC solenoid kit)
CO2 based boost control
Set boost by RPM and throttle, ground speed, or gear
Rally style anti lag
Water injection control – on/off or variable
Knock sensor input with adjustable sensitivity, crank angle windowing, and more
Table switching input. Change fuel and spark maps on the fly for different fuels, nitrous activation, etc.
Input for flex fuel sensor – switch between E85 and gasoline on the fly!
CANBus connector allows interconnection of other MegaSquirt-compatible devices for additional functions (EGT Input, Automatic Transmission Controller, Additional Sensors…..the possibilities are limitless!

What you get in the box:

MS3Pro Plug and Play for 1996-1999 BMW M3 E36 ECU
RS232 tuning cable
20 Pin Options Connector
Tuning Software and Documentation on a card with a QR code with two base maps included for stock M52 & S52
6′ Vacuum Hose for MAP Signal and ‘T’ fitting
ECU mounting brackets
Registered version of TunerStudio and MegaLog viewer included

Fits the following applications. Confirmed for US market vehicles:

1998-1999 BMW E36 323is/323ic with M52 motor and manual transmission
1996-1999 BMW E36 328i with M52 motor and manual transmission
1996-1999 BMW E36 M3 with S52 motor and manual transmission
1995-1998 BMW E39 528i with M52 motor and manual transmission
1995-1998 BMW E38 728i with M52 motor and manual transmission
1997-1998 BMW Z3 2.8i with M52 motor and manual transmission (Not compatible with the later M52TU motor)
1997-2000 BMW Z3M with S52 motor and manual transmission

Suggested Add-ons:

If you want the ECU to control boost, you will need a boost solenoid.
We always recommend purchasing a new IAT sensor.
We also recommend purchasing a high-quality wideband sensor.

Compatibility Notes:

Direct replacement for Siemens MS41.x DME
Not compatible with M52TU DME Siemens MS42
Not compatible with European market M3.
South African market 1997-2000 Land Rover Defender with M52 likely to work, but compatibility is not confirmed at this point.

Scratch & Dent Collection

Engine Mount Set - Fits M42, E30 - SND

Condor Weighted "Shorty" Shift Knob - No Cap - SND

Engine Mount Set - E39 - SND

E36 & Z3 MS3Pro Plug-N-Play Standalone Engine Management System (M52 & S52) - SND