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Optimising your transmission is not just about going faster or having more power. Few people realise how much an automatic transmission contributes to the overall driving experience. From crawling in traffic to city driving to taking your car to the drag strip or racetrack, the TCU largely defines how your car feels. Just as everyone drives differently with a manual transmission, the maps in the TCU hold the secrets to tuning your automatic to your personal preferences and finally experiencing what BMW promised you in the glossy brochure:

Sheer driving pleasure!!

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Overview

This wiki will guide you through flashing your TCU (Transmission Control Unit) with xHP. We've done everything possible to make this process easy, safe and smooth. However, tuning a vehicle and flashing ECUs in a car always requires attention to certain things and prerequisites. The following pages list the requirements and how to avoid problems before they occur.

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