Where are cabin air filter on a 2003 Dodge Ram?

The cabin air filter on a 2003 Dodge Ram 1500 is located behind the glove box. To access it, you'll typically need to remove or partially remove the glove box itself. The exact procedure varies slightly depending on the trim level and whether your truck has a factory-installed air filter (some didn't). You'll likely find instructions online by searching for "2003 Dodge Ram 1500 cabin air filter replacement" along with your specific trim level (e.g., Quad Cab, Regular Cab, etc.) to get the most accurate instructions.