MS43/MS42 TUNED ECU

from $200.00

Only for MS43/MS42 years 1999-2003

You may ship us your stock ECU to be tuned and shipped back, or you may purchase a fresh ECU for $50 more to have tuned and shipped to you.

Swipe through the photos to see each Stage's features and requirements.

Customization is available once added to the cart.

Compatible models:

E46 320, 323, 325, 328, 330

Z3 2.3, 2.5, 2.8, 3.0

E39 523, 525, 528, 530

E53(x5) 3.0

Stage:
Pre-tuned ECU:

Only for MS43/MS42 years 1999-2003

You may ship us your stock ECU to be tuned and shipped back, or you may purchase a fresh ECU for $50 more to have tuned and shipped to you.

Swipe through the photos to see each Stage's features and requirements.

Customization is available once added to the cart.

Compatible models:

E46 320, 323, 325, 328, 330

Z3 2.3, 2.5, 2.8, 3.0

E39 523, 525, 528, 530

E53(x5) 3.0

***6cyl MS42 and MS43 vehicles only***

If you are unsure what ECU your vehicle has, refer to our FAQ page here

All ECUS come EWS deleted and are completely plug and play.

All stages offer an increase in horsepower and torque.

A stage sticker and business card with a QR code are provided with the purchase. The QR code is a link to the installation instructions, also available here.

Rear O2 and SAP Bypasses, are not intended to pass emissions. The intended purpose is to notify the ECU of no longer installed hardware which simultaneously removes the check engine light as the ECU is now aware of the hardware changes. In some cases, this can ready monitors, but understand, this is for offroad and/or competition use only. Please abide by your applicable laws. Read our Terms & Conditions for more information.
FOR OFF-ROAD USE ONLY