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Front Exterior Light Bulbs Replacement
 
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Pelican Technical Article:

Front Exterior Light Bulbs Replacement

Nick Czerula

Time:

1 hours1 hrs

Tab:

$10

Talent:

**

Tools:

flathead screwdriver

Applicable Models:

BMW Z4 Convertible (2003-06)
BMW Z4 Coupe (2006)

Parts Required:

Light bulbs, sockets if needed

Hot Tip:

Do not touch bulbs with bare hands

Performance Gain:

Working exterior lights

Complementary Modification:

Replace bulbs in pairs

There are a number of exterior light bulbs around your BMW Z4 that require maintenance. The front side marker lights are located in the headlight. The front fog light is mounted in the bumper cover and is accessible from behind the wheel well liner. The turn signal bulb is mounted in the headlight and serviceable without removing the headlight.

Z4 exterior bulbs are monitored by the Light Module (headlight switch, LM), which also monitors and controls instrument panel dimming.

Bulb monitoring by LM is done both cold and hot (unlit or lit). In cold monitoring, LM sends brief current pulses to unlit bulbs to measure their resistance. The pulses are too short to illuminate bulbs but serve the purpose of evaluating whether an individual bulb or bulb circuit is defective. In hot monitoring, LM measures the current to individual lit bulbs to determine overload or a break in the circuit.

Keep in mind that when your car was serviced before, parts may have been replaced with different size fasteners used in the replacement. The sizes of the nuts and bolts we give may be different from what you have, so be prepared with different size sockets and wrenches.

Protect your eyes, hands and body from fluids, dust and debris while working on your vehicle. If you're working with the electrical system, disconnect the battery before beginning. Always catch fluids in appropriate containers and properly dispose of any fluid waste. Recycle parts, packaging and fluids when possible. Never work on your vehicle if you feel the task is beyond your ability.

Our vehicle may vary slightly from yours as models do change and evolve, as they grow older. If something seems different, let us know and share your info to help other users. Do you have questions or want to add to the article? Leave a comment below. When leaving a comment, please leave your vehicle information.

There are a number of exterior light bulbs around your BMW Z4 that require maintenance.
Figure 1

There are a number of exterior light bulbs around your BMW Z4 that require maintenance. The front side marker lights are located in the headlight (blue arrow). The front fog light is mounted in the bumper cover and is accessible from behind the wheel well liner. The turn signal bulb is mounted in the headlight (purple arrow) and serviceable without removing the headlight. There is the driving (red arrow) and headlight (green arrow) as well.

Working in the wheel well, rotate the access panel locks (red arrows) 180° to unlock them.
Figure 2

Working in the wheel well, rotate the access panel locks (red arrows) 180° to unlock them.

Open the access panel (red arrow) and remove it from the vehicle.
Figure 3

Open the access panel (red arrow) and remove it from the vehicle.

With the access panel removed, you can now see the back of the headlight.
Figure 4

With the access panel removed, you can now see the back of the headlight. Unclip the retaining rod (red arrow) by pulling it down (inset).

With the rod unclipped, remove the headlight bulb access cover (red arrow).
Figure 5

With the rod unclipped, remove the headlight bulb access cover (red arrow). Lift off the side closest to the fender. Then slide the tab out of the side closest to the radiator.

Headlight: Start by rotating the bulb igniter (red arrow) counterclockwise.
Figure 6

Headlight: Start by rotating the bulb igniter (red arrow) counterclockwise. Follow the direction of the arrow for the opening on the igniter. The electrical connector (green arrow) will automatically unplug as you rotate it.

Headlight: Then squeeze the bulb spring (red arrows) together and unclip it.
Figure 7

Headlight: Then squeeze the bulb spring (red arrows) together and unclip it. Then remove the bulb from the headlight.

Headlight: Reverse the steps to install the new bulb.
Figure 8

Headlight: Reverse the steps to install the new bulb. When installing the igniter (green arrow), install the electrical connector. Then rotate the igniter to lock it in into place. The connector will lock as well. Check the connector fitment. Push it in to engage it if necessary.

Side Marker Bulb: To the side of the headlight bulb, you can just see the plastic tab for removing the side marker bulb (red arrow).
Figure 9

Side Marker Bulb: To the side of the headlight bulb, you can just see the plastic tab for removing the side marker bulb (red arrow). Rotate the tab for the bulb socket (red arrow) counter-clockwise 90 degrees and pull it to remove it from the lens.

Side Marker Bulb: Pull the bulb (red arrow) straight out and replace it with the new one.
Figure 10

Side Marker Bulb: Pull the bulb (red arrow) straight out and replace it with the new one. Install the bulb holder into the headlight. Twist it clockwise until you feel it pop in, about 90 degrees.

Front Driving Light: The driving light is located next to the headlight bulb (red arrow).
Figure 11

Front Driving Light: The driving light is located next to the headlight bulb (red arrow). To remove it, the plastic housing is rotated about 45 degrees.

Front Driving Light: Rotate the bulb holder 45° and remove it from the headlight.
Figure 12

Front Driving Light: Rotate the bulb holder 45 degrees and remove it from the headlight. The red arrows point to the Torx screws that act as retaining tabs. Do not remove them. Just rotate the holder (green arrows) until it clears the screws.

Front Driving Light: This photo shows the holder (red arrow) clearing the screw (green arrow).
Figure 13

Front Driving Light: This photo shows the holder (red arrow) clearing the screw (green arrow). Once in this position, remove it from the headlight.

Front Driving Light: Disconnect the electrical connector (red arrow) from the bulb (green arrow) by pulling it straight out.
Figure 14

Front Driving Light: Disconnect the electrical connector (red arrow) from the bulb (green arrow) by pulling it straight out. The holder and bulb are replaced as a unit. Reverse the steps to install it. When installing the socket, you will feel the screws pop passed the holder. This will confirm it is properly engaged.

Turn Signal Bulbs: The turn signal bulbs (red arrows) are located in the headlight assembly, mounted in the bottom corners.
Figure 15

Turn Signal Bulbs: The turn signal bulbs (red arrows) are located in the headlight assembly, mounted in the bottom corners. There are two. The inset photo shows a better view of the inner bulb.

Turn Signal Bulb: Using a Philips head screwdriver (red arrow), rotate the bulb holder 45° counterclockwise.
Figure 16

Turn Signal Bulb: Using a Philips head screwdriver (red arrow), rotate the bulb holder 45 degrees counterclockwise.

Turn Signal Bulb: Once unlocked, use needle nose pliers to grab and remove it from the headlight.
Figure 17

Turn Signal Bulb: Once unlocked, use needle nose pliers to grab and remove it from the headlight.

Turn Signal Bulb: Remove the holder with the socket.
Figure 18

Turn Signal Bulb: Remove the holder with the socket. Then rotate the bulb 45 degrees to unlock it from the socket and replace it with a new one. To install, reverse the instructions.


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Page last updated: Fri 12/2/2016 02:58:15 AM