My 2008 very clean Highlander just had this problem last night during a heave thunderstorm. I took my vehicle to my mechanic who immediately diagnosed the issue. He stated that I lost 3 quarts of oil and got there just in time, seems no damage to the issue. I called Toyota after seeing that this was an issue with Highlanders, and other Toyota models. The representative from Toyota did a vin check and stated that my vehicle was not included in the recall. Wonder why!! I'm going to send in my receipt in hopes that I will be compensated for this issue that should have been solved by recall!