Not sure which 2003 Toyota Sienna Air Filters are right for you? We have over 14810 customer reviews, with an average rating of 4.5, to help you find exactly what you're looking for. Here's what some of our customers have said:
"In Missouri, they recently mandated that all "regular" gasoline contain 10% ethanol. It didn't take but 2 tanks for me to notice a dropoff in my gas mileage. I ordered and installed a K&N air filter on my 03 Toyota Sienna, and am getting about the same mileage as before the ethanol was added to gasoline. Thank you, K & N." —John W from Smithville, MO bought a K&N Air Filters for a 2003 Toyota Sienna.