One problem related to catalytic convertor has been reported for the 2003 Lexus GX470. The most recently reported issues are listed below.
Whenever giving the vehicle moderate to high acceleration, a rotten egg smell comes out of the air conditioner vents. The smell is so bad that it makes me dizzy.
| Engine Exhaust System problems | |
| Engine Cooling System problems | |
| Manifold/header/muffler/tail Pipe problems | |
| Gasoline Engine problems | |
| Catalytic Convertor problems |