The 2014 Hyundai Sonata has two air filters you may need to service: the engine air filter and the cabin air filter. The engine air filter sits in the engine bay inside the air intake housing, while the cabin air filter lives behind the glove box and feeds air through the HVAC system.
Engine air filter: location and replacement
The engine air filter is housed in a rectangular black plastic box in the engine bay, tied into the intake duct that feeds air to the throttle body. You’ll replace it by opening the housing, removing the old filter, and inserting a new one with the correct orientation.
- Park on a level surface, apply the parking brake, and turn off the engine. Open the hood and secure it.
- Locate the engine air filter housing, a rectangular plastic box connected to a large intake hose that leads toward the throttle body.
- Release the clips or screws holding the lid. Depending on the model, you may use your fingers to release clips or a small screwdriver for screws.
- Remove the lid and take out the old filter. Note which way the filter sits (arrows usually indicate airflow toward the throttle body).
- Insert the new filter in the same orientation, reseal the housing, and re-secure the clips or screws.
- Close the hood and start the engine to ensure everything is seated properly and there are no abnormal noises.
Regular replacement intervals vary with driving conditions, but a typical guideline is every 15,000 to 30,000 miles. Always check the owner’s manual for the exact recommendation for your engine variant.
Cabin air filter: location and replacement
The cabin air filter is located behind the glove box on the passenger side of the vehicle. It cleans air entering the HVAC system, helping reduce dust, pollen, and odors inside the cabin. Replacing it requires access to the filter housing and removing the old filter.
Cabin filter replacement steps
Below are steps to access and replace the cabin air filter in a 2014 Sonata with typical glove box arrangement.
- Turn off the car and open the glove box. Remove its contents to gain access.
- Release the glove box damper or stops so the glove box can drop down fully. You may need to squeeze the sides slightly to disengage its stops.
- Find the rectangular cabin filter housing behind or above the glove box and remove the housing cover by unclipping or unscrewing it.
- Take out the old cabin filter, noting the correct orientation (airflow arrows usually point toward the HVAC unit).
- Install the new cabin filter with the arrows facing the same direction as the old one, ensuring it sits flat in the housing.
- Reattach the housing cover, secure the glove box, and close the glove box. Start the car to verify proper airflow.
Tips: Choose a cabin filter that matches your model year and preferred filtration (standard, activated carbon for odor control, or higher MERV-rated options). Check and replace typically every 15,000 to 25,000 miles, depending on environment and driving conditions.
Summary
For a 2014 Hyundai Sonata, there are two filters to consider: the engine air filter inside the engine bay’s air intake housing, and the cabin air filter located behind the glove box. Both replacements are straightforward with basic tools, and following the filter orientation markers ensures proper airflow. Regular maintenance helps sustain engine performance and cabin air quality.