2003 BMW 745i Replace Halogen Headlights
The 2003 745i was positioned at the upper spectrum of BMW's 2003 luxury automobile line and was fitted with a range of features that added to the 745i's appeal. While many of these features were integrated into the car's interior or chassis, a Xenon-powered high-intensity discharge-type low beam headlight was used to illuminate dark roads. A single halogen H7 bulb placed in each headlight assembly was used to provide high-beam functions. Unlike the Xenon bulbs, halogen bulbs will need to be replaced when they eventually burn out. Doing so is a quick job that nearly any 745i owner can do on their own.
 Tools Used
|55 watt H7 headlight bulb|
 Replace Halogen Headlights
- Open the hood and let the headlights and engine cool for a minimum of 10 minutes.
- Push down on the tab at the top of the high beam bulb cover, which is the large black cover attached to the back of the headlight assembly. Pull the cover away from the headlight, by hand.
- Unplug the electrical socket from the base of the bulb. Grasp the headlight bulb base and turn it counterclockwise one-quarter of a turn, then pull the bulb out from the headlight assembly.
- Insert a new 55 watt H7 headlight bulb into the headlight, then turn the bulb clockwise one-quarter of a turn to lock it into place. Push the electrical socket onto the prongs at the base of the headlight bulb.
- Push the lower portion of the high beam bulb cover onto the headlight assembly. Slip the upper tab into headlight, then push the cover forward until the tab snaps into place.
- Turn on the car's headlights and cycle between high and low beam. Check that the bulb and the electrical socket are connected securely, if the high beam does not illuminate. Lower the hood and turn off the headlights once you have verified that the high beam is operating.
 Tips & Warnings
- The headlight bulbs used by your BMW 745i are filled with a pressurized charge of halogen gas, which is extremely sensitive to oil and grease. Touching the glass portion of the bulb with your bare skin will permanently damage the bulb, and in some cases, cause the bulb to shatter.