I just had the security update done to my E91 320d that stops the key recoding problem that's been causing a lot of bimmers to be nicked recently. I took the evolve map off before taking it in for the software upgrade, I assume that I can reload the evolve map with my switch now or will the software update be wiped off if I do this? Does it just stick the map back on? If the software is at risk is their a way to sort it out.
p.s. I had forgotten how much difference there was till I drove home with it set to the stock map!