Acura 2003 MDX Owner's Manual page 328

Main Menu Table of Contents
Spark Plugs
4. Disconnect the wire connector
from the ignition coil by pushing
on the lock tab and pulling on the
connector. Pull on the plastic
connector, not the wires.
324
Maintenance
HEXAGON SOCKET HEAD CAP BOLT
5. Use a wrench to remove the
hexagon socket head cap bolt
holding the ignition coil. Remove
the ignition coil by pulling it
straight out.
6. Remove the spark plug with
a five-eighths inch (16 mm) spark
plug socket.
7. Put the new spark plug into the
socket, then screw it into the hole.
Screw it in by hand so you do not
crossthread it.