Toyota Highlander owners have reported 3 problems related to engine head gasket leaking (under the engine and engine cooling category). The most recently reported issues are listed below. Also please check out the statistics and reliability analysis of Toyota Highlander based on all problems reported for the Highlander.
Head gasket leaked car less than 100k miles and less than 5 years. Google search showed similar problems with other Highlanders.
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all problems of the 2013 Toyota Highlander
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The engine was pouring anti freeze on the road from the engine. The engine's head bolts were striped causing the head gasket to leak. This was a manufacturers defect and even sent out a service bulletin but should have been a recall due to the safety of other cars on the roadway. The epa should also be involved due to the hazardous material being placed in the ground.
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all problems of the 2003 Toyota Highlander
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2003 Highlander , 2. 4 engine started leaking antifreeze on driveway. Pressure tested ok. Head gasket leaking due to stripped head bolts. Mechanic stated this is a common problem with the 2. 4 engine. Usually between 80,000 & 120,000 miles. Repair estimated at $2000.