Two filters keep the Sienna’s air clean: the engine air filter sits in the engine bay inside a rectangular housing on the passenger side, and the cabin air filter is tucked behind the glove box on the passenger side. This guide explains exactly where to find them and how to replace them.
Engine air filter location
The engine air filter is housed in a rectangular box at the front/top of the engine compartment on the passenger side. The housing is secured with clips or screws, and its lid lifts off to reveal the filter inside.
- Park on level ground, turn off the engine, and open the hood.
- Locate the engine air filter housing on the passenger side of the engine bay; it’s a rectangular black box connected to a large intake hose.
- Release the clips or remove the screws to lift the lid and access the filter.
- Remove the old filter and inspect the housing for dust or debris.
- Install a new filter, making sure the orientation arrows on the filter point toward the engine (airflow direction).
- Reinstall the lid and secure the clips or screws, then close the hood.
Regular replacement depends on driving conditions and environment. Check the owner’s manual for the recommended interval; in normal conditions it’s commonly around 30,000 miles, with more frequent changes in dusty or harsh conditions.
Cabin air filter location
The cabin air filter is located behind the glove box on the passenger side. Access involves lowering the glove box to reach the filter housing behind it.
- With the ignition off, open the glove box and remove contents.
- Squeeze the sides of the glove box to release the stops and lower the box to expose the filter housing behind it.
- Remove the filter housing cover by releasing its latches or screws.
- Take out the old cabin filter and wipe or vacuum the housing if needed.
- Install the new filter with the airflow arrows pointing toward the blower motor (into the cabin).
- Reinstall the housing cover, raise the glove box back into place, and ensure the damper is reattached.
Cabin filter replacement intervals vary by usage; consult the owner’s manual and consider more frequent changes in dusty or high-traffic environments.
Summary
In the 2015 Toyota Sienna, the engine air filter sits in a rectangular box in the engine bay on the passenger side, while the cabin air filter sits behind the glove box on the passenger side. Replacing these filters is a manageable DIY task with basic tools, and following the manual’s guidance helps maintain engine performance and interior air quality. If you’re not comfortable performing the replacement yourself, a technician can handle it quickly.