Hello, i have done the rivits thing, drill them out and slide out the sensors you then can clean it but dont touch any of the exposed parts they should just come clean with the liquid, i think i dipped it nail varish remover or the stuff you use to clean dvd player heads. Leave it of about an hour to make sure it dry and then replace and use screws. Mine was showing low air flow on MSV after cleaning it was in acceptable levels. Cleaning sure beats the price rimmer brothers are charging for a landrover part £800+, post suggest that a patent part can cause more issues, just take care when cleaning. I got one from a scrap yard for £10 as a spare will repeat the process again as long as the sensors are not broke should be ok.
cheers
Onetime