Exhaust fumes coming thru air vents .When stopped at the lights it gets worse.
Don’t drive it. Carbon monoxide kills.
Get your exhaust system repaired.
What is this , about the third post recently about exhaust fumes getting in the vehicle ? Why do people take a life threatening event and not find a shop to fix it instead they go on a Forum .
As someone who has had Carbon Monoxide poisoning I can tell you that being that ill is not something I ever want to do again . Was not a vehicle but a bad home heating furnace.