The engine air filter in a 2017 Hyundai Elantra is housed in a rectangular black plastic box on the passenger side of the engine bay, connected to a large intake hose that leads to the throttle body.
In this guide, we explain exactly where to look, how to identify the air-filter housing, and how to replace the filter when needed. The location is largely the same across trim levels, though the exact fasteners and nearby components may vary slightly.
Location overview
To assist quick identification, note that the air filter sits inside a rectangular air-filter housing on the passenger side of the engine bay, near the fender and toward the front of the car. The intake hose attaches to the side or top of this box and runs toward the throttle body.
- Air filter housing: a large rectangular black plastic box mounted in the passenger-side area of the engine bay.
- Air intake hose: a thick rubber tube that plugs into the housing and stretches toward the throttle body or intake manifold.
- Fasteners: the housing is secured with several clips or screws on the cover; some models use simple plastic clips, others use small screws.
- Cover orientation: the top of the box is removable; make sure the seal is intact when reassembling.
With these cues, you should be able to locate the air filter housing quickly in the Elantra's engine bay, even if you are not familiar with the layout.
Accessing and replacing the air filter
Before you begin, ensure the engine is cool and you have the correct replacement filter for your 2017 Elantra. This guide covers standard panel-type filters used in most trims.
Steps to access and replace the filter:
- Open the hood and locate the air filter housing on the passenger side of the engine bay, near the front-right corner and away from the radiator core support.
- Unclip or unscrew the housing cover. Depending on trim, there may be 2–4 clips or small screws; use a flat-head screwdriver if needed for stubborn clips.
- Lift the cover and carefully remove the old filter. Note the orientation and any markings indicating airflow direction.
- Inspect the old filter; if it is dirty, replace it with a filter that matches the part number in your owner's manual or parts catalog.
- Wipe the inside of the housing gently with a clean cloth to remove dust or debris; avoid dislodging any seals.
- Insert the new filter with the correct orientation so the arrows on the filter face the direction of airflow toward the engine.
- Reinstall the housing cover and secure all clips or screws firmly; reconnect any hoses if you removed them during the process.
- Close the hood and start the engine to ensure there are no noises or leaks around the air box.
Regular replacement of the air filter helps maintain engine performance and fuel efficiency, and reduces intake of dust and debris into the engine.
Maintenance notes and frequency
Refer to the owner's manual for the recommended interval and filter type for your specific trim and driving conditions. In practice, many drivers inspect the air filter at routine service intervals and replace it when it shows visible dirt or a noticeable drop in performance.
Summary: In the 2017 Hyundai Elantra, the engine air filter is located inside a rectangular air-filter housing on the passenger side of the engine bay, connected to the intake hose. Access by removing the housing cover, replace the filter with the correct part, and securely reseat the cover and intake hose to restore proper airflow.