Three problems related to coolant leaking have been reported for the 2006 Toyota Highlander. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2006 Toyota Highlander based on all problems reported for the 2006 Highlander.
Tl-the contact owns a 2006 Toyota Highlander. The contact stated that while driving approximately 15 mph, when she noticed the temperature gauge had increased. In addition, the traction, check engine and vhc warning lights had illuminated. The independent mechanic diagnosed that she had coolant fluid leaking and she needed to purchase an engine kit from Toyota for the repairs. The vehicle had not been repaired. The manufacturer was aware of the issue. The VIN was unavailable. The approximate failure mileage was 130,000. Ne.
While driving the temperature gauge rose above the read line (hot). Before I was able to get to a parking area it continuously rose and fell, however, it never dropped as low as the middle line on the gauge. After checking the fluids we had to add water. We took the Highlander and were told that it had a coolant leak. From there we took it to a Toyota dealership and were told that the entire engine would need replacing. I claimed that this had to be some sort of factory defect because he explained that the threads were stripped and the bolts were coming out "the head is pulling away from the block". We have always taken great care of our vehicle and this is not something that should happen to any well made vehicle. After doing research online I found that many others have suffered with the exact same issue and nothing was done to help with their situation. Please see the web page below. . Read more...
Coolant leaked from engine onto floor in large amounts. Our mechanic said threads were stripped and head gasket bolts had pulled out. Only solution, new engine or possible rebuild by Toyota dealership. We were under 60,000 mile warranty but over 60 months. Toyota refused to help us. Sadly I've been changing my own oil and didn't keep all receipts for a maintenance record. Lesson learned. Toyota dealership offered new engine for $7,300 or rebuild for $4,600. We had non-Toyota mechanic rebuild threads for $2,300. Car works fine now. Way more money than we expected to spend on a Toyota with under 60,000 miles.