My sensor ring is spaced right out. I removed the plastic behind the leather, (my cowl has a leather cover).
It still doesn't work on first start on a cold morning in the garage although after that first start it's fine all day.
Wiping the key around the ring deactivated the immobiliser.
I removed and reattached the engine earth strap, and the one in the rear offside corner in the spare wheel well, but the quirk has remained. It didn't emerge for the first 18 months.
DaveW '05 Red Roadster S1 '16 Yellow (Not the only) Narrow AR GDI Plus 4
