The 2001 to 2005 Honda Civic uses a headlight set-up different than many vehicles. The headlight is secured by a metal hold-down wire, rather than by a typical twist socket. No tools are required to replace your 2002 Civic's headlight. Therefore, the procedure is fairly simple and can be done at home by most, whether mechanically inclined or not. Only use the factory-recommended replacement bulbs for your Honda Civic.
Carefully lift the power steering fluid reservoir from its mount; set the reservoir aside to access the driver side headlight (do not disconnect the hoses from the reservoir).
If replacing the passenger side headlight, removing the reservoir is unnecessary.
Squeeze the sides of the electrical connector (behind the headlight assembly) to release it; pull the connector straight away to unplug it. Pull the tab on the rubber headlight socket seal to remove the seal.
Unclip the top portion of the hold-down wire. Lower the wire to allow access to the headlight bulb. Pull the bulb straight out.
Insert the replacement bulb (it's not necessary to turn the bulb--simply insert it straight). Flip up the hold-down wire and clamp the top to the mount to secure it.
Re-attach the rubber seal by pushing it straight onto the socket. Reconnect the electrical connector.
If you moved the power steering fluid reservoir, put it back in place.
Touching the glass will damage the replacement bulb. Wear gloves to prevent the oils from your skin from damaging the bulbs. The Civic's headlight bulb does not have a plastic module or base that can be used to hold it; gloves are not optional.