Bmw f11 520d m sport. after a blown headlight (what i thought due to no low beam and error msg on idrive, i have replaced both bulbs (halogen).

Try swapping the nearside bulb with the offside bulb. If the fault moves with the bulb, then the bulb itself is at fault. Occasionally, halogen bulbs give a distorted beam pattern, and no amount of adjustment will fix it. Also, make 100% certain the bulb hasn't been inserted upside down. There is a locating tab on the bulb, so make sure it is sitting in the cut out in the bulb holder correctly.

NO YOU HAVE TO REPLACE HIGH BEAM LIGHT BULBS WITH HIGH BEAM LIGHT BULBS BECAUSE HIGH BEAM LIGHT BULBS AND LOW BEAM LIGHT BULBS TWO DIFFERENT TYPES OF BULBS.WEAR CLEAN LATEX GLOVES HANDLING THE HEADLIGHT BULBS WHICH IS HALOGEN LIGHT BULBS, OIL FROM FINGERS OR HAND WILL CAUSE HALOGEN BULBS TO OVER HEAT BLOW OUT.

Hi Every single time I have had a failure of low beam in a headlight without failure of high beam, it has been because the lamp bulb or halogen lamp module has reached the end of its serviceable life, not because of any wiring problems. Low beam burns out first because it is on the most. If low beam is lost simultaneously in both headlights, I would check fuse first, then the headlight switch. If low beam is lost on one side only, it is almost always going to be due to the bulb or lamp module needing to be replaced. In that case, replace them in both headlights because the other one will be going kaput in short order, as well.Also if you already replaced the fuse and bulb check the headlight dimmer control switch.
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Removal & Installation To Remove:
WARNING
The halogen fog light bulb contains gas under pressure. The bulb may shatter if the glass envelope is scratched or if the bulb is dropped. Handle the bulb only by its base. Avoid touching the glass envelope.
NOTE: The headlight bulb should not be removed from the headlight assembly until just before a replacement bulb is installed. Removing the bulb for an extended period of time may affect headlight bulb performance. Contaminants may enter the headlight assembly where they can settle on the lens and reflector. Never turn on the headlights with the bulb removed.

1. Before servicing the vehicle, refer to the precautions in the beginning of this section. NOTE: Make sure that the headlight switch and the ignition switch are in the OFF position.
   
2. Remove the pin-type retainers, screws and the air deflector from the radiator.
3. Remove the three bolts and the headlight assembly.
4. Disconnect the electrical connector.
5. Remove the cover from the rear of the headlight assembly.
6. If equipped with HID, release the spring tabs to remove the low beam bulb, otherwise disconnect the electrical connector and remove the bulb.
7. Disconnect the electrical connector and remove the high beam bulb.

HID low beam headlight bulb

Standard low beam headlight bulb

High beam headlight bulb

To Install:

1. Place the headlight assembly in the proper position.
2. Install the cover from the rear of the headlight assembly.
3. Connect the electrical connector.
4. Install the three bolts and the headlight assembly.
5. Install the radiator air deflector.

How to Replace a Headlight Bulb
(DIY Complexity: Easy / Time: 0.9 hour)

Parts:
1. Headlight Bulb

Tools:
1. Screwdriver
2. 1/4 in. Drive Ratchet
3. Socket Set



HIGH PERFORMANCE HALOGEN HEADLIGHT BULB -- Low 45/high 65 watts, Dual C-8 filament for both high beam and low beam; 100 percent legal halogen headlight bulbs; Features the whitest and brightest light color similar to daylight for safer night driving; Meets all US FMVSS 108 and Canadian CMVSS 108 requirements.

Steps:
Step 1 Open the hood and locate the headlight assembly.
o Tip: Most headlight assemblies have a place in the rear to gain access to the headlight bulb.
o Tip: It is recommended that headlight bulbs are replaced in pairs.
o Tip: Always make sure the struts on the hood can fully support the weight of the hood so that it does not close on you while working. The use of a hood prop can securely hold it in place.
o Tip: Safety Tip:Always wear safety glasses when working on your vehicle. Wear other personal protective equipment (PPE) when necessary, for example latex gloves or safety shoes.

Step 2 Gain access to headlight bulb.
o Tip: It is a good idea to check the high beam and low beam headlight bulbs at this time.

Step 3 Disconnect the wiring harness and replace the old headlight bulb with a new one.



Remove the retaining ring from the base of the bulb, then...




...turn the bulb and remove it from the headlight assembly.

Step 4 Turn on the headlights and check high and low beams to verify repairs.


Hope this help (remember comment and rated this).

about troubleshooting your headlights on your vehicle. I would isolate the wire that comes from the headlight switch to the headlamp bulbs for low beam and check to see if there is a short in the wire. You can find this wire by using a test light turn on the key and get a good ground with the test light poke the wire and see if the test light illuminates with the headlight switch on. ---- Also check the wires, and check the fuse for your low beams. could of blown a fuse on your lows, but your highs will still work.
Every single time I have had a failure of low beam in a headlight without failure of high beam, it has been because the lamp bulb or halogen lamp module has reached the end of its serviceable life, not because of any wiring problems. Low beam burns out first because it is on the most. If low beam is lost simultaneously in both headlights, I would check fuse first, then the headlight switch. If low beam is lost on one side only, it is almost always going to be due to the bulb or lamp module needing to be replaced. In that case, replace them in both headlights because the other one will be going kaput in short order, as well.
There is something to check. Does the low beam relay click when you turnt he low beams on?
if it does not click then
Then find the BCM at the base of the steering column. In there find the grey connector and in there, find the pink/white wire in terminal A4. Use a wire to jump that wire to ground. IF the low beams come on, then it is likely the BCM is bad.
Also check a bad wire between the fuse block and the BCM. before replacing the BCM . Start under the fuse block. This is the fuse block under the hood.
This will help. Thanks please keep updated.please do rate the solution positively .thank you for using fixya

Hi,
It has been because the lamp bulb or halogen lamp module has reached the end of its serviceable life, not because of any wiring problems. Low beam burns out first because it is on the most. If low beam is lost simultaneously in both headlights, I would check fuse first, then the headlight switch. If low beam is lost on one side only, it is almost always going to be due to the bulb or lamp module needing to be replaced. In that case, replace them in both headlights because the other one will be going kaput in short order, as well.
Most like the low beam filiment is bad but the high beam filiment is still good, try replacing bulb. If replacing bulb does not fix problem then you probably have voltage problems and should check the voltage reading and the plug.
OR
isolate the wire that comes from the headlight switch to the headlamp bulbs for low beam and check to see if there is a short in the wire. You can find this wire by using a test light turn on the key and get a good ground with the test light poke the wire and see if the test light illunimates with the headlight switch on.
check the wires, and check the fuse for your lowbeams. could of blown a fuse on your lows, but your highs will still work.

The fuse box is located in the engine compartment,on the driver's side. Has thumb-screw retained cover.
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The adjustment screws/nuts should be located either on the top of the headlamp assembly, behind the headlamp assembly, or near the frame rail by the radiator support.

You will have vertical adjustment screws for each independent beam (separate highs and separate lows, but will be same screw if highs and lows are the same bulb). You may also have additional horizontal adjustment screws as well

Park your car on a level ground 30 feet from a wall and measure the height from the ground to the bulb and mark on a wall (do this for highs beams and low beams if the bulbs are separate, if highs and lows are the same bulb, only do it for the lows)

If the headlights read VOR, then aim the brightest part or cutoff part just below the mark on the wall. If it says VOL or nothing, aim them 2 inches below the mark on the wall.

I am assuming that you have a burned out head light bulb.
1) Open hood.
2) Working in back of headlight assembly, grasp rear of bulb socket (harness connector) and turn counterclockwise 90 degrees. Pull bulb out of headlight assembly.
3) Disconnect harness connector from bulb (gently pry, it's plastic)
4) Installation is reverse of removal. (Do not touch halogen bulb with bare skin-oils from hand will cause bulb to burn out.) Align tabs on bulb base to cutouts on rear of lens assembly. (Note bottom tab is wider than other two) Secure bulb by rotating clockwise 90 degrees.
Low beam bulb H9006
High beam bulb H9005

It's a bulb replacement. If it's anything similar to my Audi, there is a cover on the back of the headlight housing that you pop off. Then you can reach in, pull the wire connector off the bulb, and unclip a metal retainer over the bulb, and pull the bulb out. Installation of the new one is the reverse. Just be SURE not to touch the glass part of the bulb. Skin oils can cause a halogen bulb to burn very hot and burn out very quickly. If you do touch the glass, wipe it gently but thoroughly on a cotton cloth to clean it off before you install it.