Bought a set of 1-step colder Spark Plugs and Ignition coils, gapped down and installed today. (picture of old spark plugs included. I think it has never been changed in 90000km) :
NGK CUSTOM Colder Heat Range Iridium Plug -
NGK BMW MINI N18 N20 N54 N55 1-Step Colder Spark Plug (97968) – ML Performance
Bought a set of 1-step colder Spark Plugs and Ignition coils, gapped down and installed today. (picture of old spark plugs included. I think it has never been changed in 90000km) :