[chrisbin]

Originally Posted by SteveG

Thanks for that.

I'll speak to my mate later and ask him what they did to his.

Have to say I'm also tempted having experienced the increase in performance in his 320D.

Only concern is if BMW do a software upgrade during a service, will it reset everything back to stock level and do they have visibility of the chip using their diagnostics ?

My thoughts too!

These issues then point me towards one of the tuning "boxes" that can be unplugged, and also sold when you change the car...but they don't seem to be regarded as the best solution.....

and so I go around in circles.........!!!!