Two problems related to engine exhaust system have been reported for the 2004 Toyota Highlander. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Toyota Highlander based on all problems reported for the 2004 Highlander.
The contact owns a 2004 Toyota Highlander. The contact stated that while at the dealer for routine maintenance, the technician noticed that the front differential was leaking fluid onto the exhaust. The technician advised the contact that the seal and the gaskets for the front differential would have to be replaced. The vehicle was not repaired. The approximate failure mileage was 113,000.
I have had to have my emission system/catalytic converter replaced twice now. The first time was in 2004, within the first 6 months of owning the vehicle and the most recent time was may 2008. Each time the symptom was a sulfur smell that I understand from the dealer happens to some 2004 Toyota Highlanders.