How often should I replace this filter?

Most drivers replace air filters every 15,000–30,000 miles depending on driving conditions. Check your filter every oil change — if it looks clogged or heavily soiled, swap it out sooner.

Do I need any tools to install this?

Installation is straightforward — you'll need to pop the clips or unscrew the air box cover (usually 2–3 bolts), slide the old filter out, and seat the new one in. No special tools required.

Will this fit my Altima without modification?

Yes. This filter is designed to match OEM air box dimensions for your engine — it seats directly without cutting, bending, or drilling.