The BMW 325i is known as a sporty performance sedan with a gutsy inline six cylinder engine. Unfortunately, this engine takes up quite a bit of space under the hood, making the headlights difficult to access. The high-beam bulbs, sometimes referred to as "bright" lights, are simple to access, but the low-beam bulbs used during normal driving must be accessed from the inner fender well. The low-beam bulbs require more frequent replacement because they are used more often.
Turn the steering wheel to the opposite direction of the headlight bulb you want to replace. For example, if you want to replace the driver 's side headlight bulb, turn the wheel all the way to the right.
Turn the headlight switch and engine off. Set the parking brake for safety.
Insert a coin into the fastener in the fender well directly in front of the tire. Turn the fastener to unscrew it, and then peel back the service flap.
Twist and remove the rubber cover to access the headlight bulb socket. Unplug the electrical connection from the socket.
Turn the socket 1/4 turn to disengage it, and then pull the bulb away from the socket. Insert the new bulb, without touching the glass--hold the replacement bulb by its plastic bottom. Push the socket back into place; turn it clockwise.
Reattach the electrical connection and the rubber cover. Position the service flap back in place and tighten the fastener with the coin.
Repeat the procedure for the opposite headlight, if necessary.
Turn the headlight switch and engine off. Open the hood.
Reach behind the headlight assembly. Twist off the rubber cover and unplug the electrical connection.
Turn the bulb socket 1/4 turn to release it. Pull the old bulb off and insert the new one--do not touch the glass--hold the bulb by its plastic bottom.
Reinsert the bulb socket into its mount. Turn it clockwise to engage it. Reattach the electrical connection and twist on the rubber cover.
