Mazda 3-2004 - Diesel fumes in car - davenpearsall
I've noticed of late diesel fumes in the car, especially when stationary. Would this suggest one of the injector seals has gone?

Sounds ridiculous but I tried taking the plastic engine over off o view but couldn't get the b***** thing off!

A friend had a focus with the same problem so wondering if it could be the same thing?
Mazda 3-2004 - Diesel fumes in car - Peter.N.

I take it you mean exhaust fumes and not fuel, could be an injector leak or one in the exhaust manifold/pipe.