check for a leak more often then not it is the flex pipe.
exhaust fumes of a car
A bad exhaust will cause gas fumes to get inside the Nissan Maxima while it is idling. Gas fumes, if contained in an enclosed space, is dangerous.
No who, but what. All internal combustion engines emit exhaust fumes.
Your exhaust may be leaking slightly at the front. The fumes can easily end up in the car this way. Exhaust gasses are poisonous so you should get it looked at as soon as you can. Another cause could be that a breather pipe has come of the engine or air box.
Exhaust
The exhaust system is what muffles the engine sound keeps the fumes out of vehicle and away from the vehicles occupants and also filters the exhaust fumes out.
your exhaust may be jammed
Exhaust
You kids exhaust me! That exhaust fumes from that car are choking me.
They don't. You need to stop sniffing exhaust fumes, mister.
I doubt a holed exhaust will pass. Apart from an increase in engine noise, as the exhaust is not working properly, exhaust fumes could seep into the interior of the vehicle - affecting badly anyone inside the vehicle.
you must have a cracked exhaust pipe or its leaking at the joint between your cat convertor or somewhere else in your exhaust track.