i had a flutter too. it happened after i took my car in for service at bmw. turns out they removed the intake manifold, and when they put it back on, they didn't seat it properly on top of the throttle bodies. there were at least 2 throttle bodies completely exposed to unfiltered air! this and several other incidents at bmw is the reason i have no confidence in their techs. it's not that they're not able to do good work. oh yes they can. but it's all about money. the more cars they work on per day, the more money they make. so they don't give a rip about the quality of work they do. sad but true.
“For God so loved the world that he gave his one and only Son, that whoever believes in him shall not perish but have eternal life.”
- John 3:16