Most cars have a cabin air filter behind the glovebox. NYC air loads it up fast — pollution, brake dust, pollen. A clogged filter cuts A/C efficiency and creates a musty smell.
Replacement is $15–$30 for the filter, 10 minutes of DIY for most cars. YouTube your specific year/make/model for the procedure.
Not a tow scenario, but worth doing once a year for the people who breathe in the car.
