The same reason you replace the filter in your home furnace. They can become clogged with lint, dirt and reduce the air flow.
There is no cabin air filter.
they do not have a cabin air filter
How do you replace cabin air filter in 1995 Toyota Previa?
Vehicle does not have a cabin air filter
How to Replace a Cabin Air Filter on a 2006 GMC
how to replace cabin air filter in 1999 Mercedes e320? how to replace cabin air filter in Mercedes e320?
It does not have a cabin filter.
2000 Nissan xterra cabin air filter
IT DOESN'T HAVE A REAL CABIN FILTER......
It wasn't built with a cabin filter.
It doesn't have a cabin filter.
Which filter? Oil, gas, air, cabin, transmission?Which filter? Oil, gas, air, cabin, transmission?