That musty smell could be coming from mold in the carpet and or it's padding, as basements tend to be damp. You could have the carpet cleaned professionally or clean it yourself with a good carpet cleaner. If this is unsuccessful it may be necessary to replace the carpet padding or both the carpet and it's padding.
To effectively remove the musty smell from your basement, you can start by improving ventilation, using a dehumidifier to reduce moisture, cleaning and disinfecting the area, and using odor absorbers like baking soda or activated charcoal.
Eva-dry EH-500F, will dry air and prevent formation of mold and fungi. This will help you in getting rid of musty smell from basement. For better result it is advisable to clean basement before installation of Eva-dry EH-500F. You can get Eva-dry EH-500F, with fragrance.
smell it! old original cards have an unmistakable musty basement smell that cannot be reproduced.
Vinegar
Buy a dehumidifier. Rent an ozone generator. Info on my site.
Kerosene smell car carpet
You can either remove your carpet and add a new one, or wash the carpet
The musty smell of moisture and possible water marks would indicate that there is a problem with water.
stick an air freshener in the interior vent
Go to a professional cleaning supplier and ask them. They have the knowledge and the products to do the job.
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A musty smell can indicate the presence of mold or mildew. These fungi thrive in damp and humid environments, leading to that characteristic musty odor. It is important to address the source of moisture and remove any mold growth to prevent potential health issues.