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The JB4 does not put any software in the ECU its all self-contained in the piggy. If its left on the car & switched to Map 0 the OBI port is clear for BMW's service use. They can even update the factory firmware.
It can only be found if the tech searches for it, pulls the cabin air filter, the cowl & opens the ECU coffin
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Kevin
Dravit Gray, Black Leather, Moonlight Roof, Red Calipers
2022 M4C - 2020 Z4 M40i - 2023 FORD Expedition XLT Max 4X4 400BHP - 2009 V-Star - 1998 Ranger 4X4 5MT - 1965 Cobra (R) 5MT - 2023 Jeep Wrangler Sport S 6MT |