Step 1: Gather the Necessary Tools and Materials
 

• New air filter
• Flathead screwdriver
• T-25 Torx screwdriver
• Gloves (optional)

Step 2: Open the Hood
 

• Pull the hood release lever inside the vehicle.
• Go to the front of the car, locate the hood latch, and release it.
• Raise the hood and secure it with the prop rod, if applicable.

Step 3: Locate the Air Filter Housing
 

• The air filter housing is typically found on the passenger side of the engine compartment.
• Look for a black plastic box with metal clips or screws securing it.

Step 4: Remove the Air Filter Housing Cover
 

• Use a T-25 Torx screwdriver to unscrew the bolts or a flathead screwdriver to unfasten any clips securing the housing cover.
• Carefully lift off the cover and set it aside.

Step 5: Remove the Old Air Filter
 

• Take note of the orientation of the old air filter to ensure correct installation of the new one.
• Lift the old air filter out of the housing.
• Dispose of the old filter properly.

Step 6: Install the New Air Filter
 

• Place the new air filter into the housing, making sure it aligns properly.
• Ensure that the filter fits snugly and that the edges are well-sealed.

Step 7: Reattach the Air Filter Housing Cover
 

• Place the housing cover back onto the air filter housing.
• Secure the cover with the screws or clips you removed earlier.
• Tighten the screws using the T-25 Torx screwdriver or fasten the clips with a flathead screwdriver.

Step 8: Close the Hood
 

• Lower the hood gently.
• Push down until you hear the hood latch securely in place.

Step 9: Test the Installation
 

• Start the engine to ensure there are no unusual sounds indicating improper installation.
• Perform a quick visual inspection to confirm that the air filter housing is secure.

By following these detailed steps, you can successfully replace the air filter on a 2017 Audi A4, ensuring your engine receives clean air for optimal performance.