I complained about mine behaving erratically at the 6k service, but AJ’s couldn’t diagnose the issue. The damping became really harsh at times.
It eventually failed at 16k (locked solid) and they wanted £1500 to replace it, but I reminded them that I’d already complained about it during the warranty period and this was noted on their system, so BMW agreed to a goodwill warranty claim.
BTW Firefox Racing in Keighley can also rebuild them for a couple of hundred quid.
Firefox - here you go.
http://firefoxracing.co.uk/bmw-esa-electronic-suspension-adjustment-servicing/
Firefox, Keighley, will refurb and rebuild for £250.
Hey OP....we're all cheering for Firefox.
