bizmin 
2003 Toyota Highlander SUV Fwd 4dr SUV (2.4L 4cyl 4A)
Former Toyota...stripped head bolts
 2003 Toyota Highlander 2.4 L 4-cylinder engine, 108,000 miles, perfect service, until it developed coolant leak on the back side of the top of the engine, adjacent to an insulator pad at the back of the engine block. The back 3 head bolts were completely stripped, allowing coolant to leak into the engine. Toyota dealer says the short block or entire engine must be replaced, with no other option [$5200- $7400+.] Based on the frequency of identical engine failures, faulty factory assembly and/or design assures eventual failure of the engine. 25-year Toyota fan, probably lost forever.