You can replace it yourself in about 15–20 minutes with basic tools. This guide walks you through locating the air filter housing, swapping in a fresh filter, and confirming the seal is secure.
What you’ll need
Before you start, gather the following items to ensure a smooth replacement and prevent extra trips to the garage.
- A replacement engine air filter compatible with the 2021 Kia Seltos (OEM or aftermarket)
- Flat-head screwdriver or small Phillips screwdriver (optional, if your model uses screws)
- Clean rag or microfiber towel
- Gloves to keep your hands clean
- Flashlight or smartphone light (optional, for better visibility inside the housing)
- Garbage bag or recycling bag for the old filter
With the right supplies, you’re ready to begin. Make sure the new filter matches the exact shape and size used by the Seltos and orient it according to the airflow arrows on the filter.
Step-by-step replacement
Follow these steps methodically to ensure a proper fit and seal.
- Park on a level surface, apply the parking brake, and turn off the engine. Let the engine cool before you touch components under the hood.
- Open the hood and locate the air filter housing on the passenger side of the engine bay. It’s a black plastic box connected to the intake duct.
- Release the clips or screws securing the lid using your fingers or a screwdriver if needed; lift the lid to expose the filter.
- Carefully lift out the old filter, noting its orientation and checking for debris inside the housing.
- Wipe the inside of the housing with a clean rag to remove dust. Inspect the seals for cracks and ensure the housing is dry and clean.
- Insert the new filter with the airflow arrow pointing toward the engine (as indicated on the filter). Press it firmly into place so it sits flat and the seal sits evenly around the housing.
- Reattach the lid and secure the clips or screws. Reconnect any intake ducting you may have removed, then close the hood.
- Start the engine and listen for any unusual whistling or air leaks. If you hear a leak, recheck the filter seating and the housing seal.
After replacement, it’s a good idea to perform a quick check: ensure there are no gaps around the housing, and keep the area clean to prevent dust from entering the intake.
Tips for proper fit and maintenance
To maximize filtration and engine performance, ensure the filter is oriented correctly and seated fully, and check the housing seal for damage. If you drive in dusty or off-road environments, you may need to replace the filter more frequently according to the vehicle’s manual.
Maintenance schedule and replacement interval
The official interval can vary by model and driving conditions. For the 2021 Kia Seltos, a typical recommendation is to replace the engine air filter about every 15,000 miles (24,000 km) under normal conditions, or sooner in dusty or harsh environments. Always refer to the owner’s manual for the exact interval and any model-specific notes or part numbers.
Summary
Replacing the engine air filter on a 2021 Kia Seltos is a straightforward DIY job that takes roughly 15–20 minutes. Gather a compatible filter and basic tools, locate and open the air filter housing, swap in the new filter with correct orientation, reseal the housing, and test the engine. Regular replacement helps protect engine performance and efficiency and should align with the maintenance schedule in your owner's manual.