Not a gremlin, per se, but a definite annoyance. The lower radiator inlets and internal shape are not designed to make clean out easy at all. Fall drives are fun, but those inlet vents are practically leaf vacuums! Not much room to maneuver a vacuum hose to clean them out. I don’t know about the M40i, but only the right side one has actual inlets. The driver side is a dummy look alike. It would have been a smart design to make the grill removable. Wet leaf build up in there will rust out the radiator
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