One problem related to loud engine noise has been reported for the 2008 Toyota Highlander. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2008 Toyota Highlander based on all problems reported for the 2008 Highlander.
Driving down roadway when a loud noise was heard in the engine, followed by check oil light to illuminate shortly after. Drove to nearest automotive repair site for service fearing more damage to engine by driving farther. Mechanic discovered oil line (previously repaired under recall) had burst and emptied all oil onto roadway. Previous repair, done under specs of recall, didn't hold up and required another repair. Toyota dealership called due to recall being performed there prior. Because it was completed to specs, no further assistance was offered. Repair completed with metal (not rubber) tubing and paid for out of pocket by driver. Fire risk noted since oil sprayed underneath car, onto back of car and onto roadway.