Acura ILX User Manual page 261

uuMaintenance Under the HooduEngine Compartment Cover
260
1Engine Compartment Cover
Holding clip (B-type)
Press down the center pin until it clicks to unlock it.
center pin
Push the center pin back to lock the clip. Then, insert
the clip into the hole and press on the center pin until
it is flat.
Push until
the pin is
flat.