How to Install a Cabin Air Filter in a 2003 Ford Escape Xlt MethodTipsWarningsThings Needed Locate and purchase the correct cabin air filter. For mine, the NAPA auto part filter number was #4816 (approx $20). It's a rectangular filter, not unlike the standard air filters you replace regularly. The difference is that this one is a bit thinner/smaller, and has plastic "posts" or "stand offs" molded into it.Locate the passenger side cowl. In plain English, this is the plastic piece just below where your window wipers sit when they are at rest. There are two "cowls" One on the driver side, one on the pSee all 17 steps on wwwhow75%(4)Published: Apr 08, 2007Views: 32K 2003 ford explorer cabin filter | eBay Find great deals on eBay for 2003 ford explorer cabin filter. Shop with confidence.