There have been posts in the past but I must have missed the final answer. I have 8700 +/- miles on my 2013 Boxster. Have driven on several long trips since new including 1200 mile round trip to NC. Car serviced in March. Last outing was about 450 miles at interstate speed (80) in July. No problems. Last week the low coolant light came on upon startup. I thought it might be a sensor problem but decided to have it checked at the dealer. Only got about 1 mile as engine temp rose rapidly and red warning came on. Had the vehicle picked up. Service advisor stated the coolant was in fact low. They've had it 10 days replacing various parts including "housings." Mechanic hasn't found any specific, definite resolution that I know of...he's just replacing stuff. For those of you with this problem, was there an ultimate resolution?