you have to remove the whole mud flap above the tire.
If only the low-beam is out, you will need to replace the low-beam bulb. It is probably not necessary to replace the entire headlight assembly.
To replace the left high beam headlight bulb on a 2003 Mazda 6, first, open the hood and locate the headlight assembly. Disconnect the electrical connector from the back of the bulb and remove the rubber cover. Twist the bulb socket counterclockwise to remove it, then replace the old bulb with a new one, ensuring not to touch the glass with your fingers. Reassemble by reversing the steps and test the new bulb to ensure it works.
how to replace 2007 Mercedes GL450 Headlight Bulb Low Beam
To replace the low beam headlight bulb on a 2006 Mazda 6, first, open the hood and locate the headlight assembly. Disconnect the power connector from the back of the bulb by squeezing the tabs and pulling it out. Remove the bulb by twisting it counterclockwise, then insert the new bulb by aligning it properly and twisting it clockwise to secure it. Finally, reconnect the power connector and test the new bulb to ensure it’s functioning.
To replace the driver's side low beam headlight on a 2008 Nissan Sentra, first, open the hood and locate the headlight assembly. Remove the cover or dust cap by twisting it counterclockwise. Disconnect the wiring harness from the old bulb, then remove the bulb by twisting it counterclockwise. Insert the new bulb, reconnect the wiring harness, and replace the cover to complete the installation.
A sealed beam headlight is just that. The unit is sealed and you replace the entire light. A composite is made of pieces that's why the name. To replace a composite you put a new blub in the back.
Carry it to dealer who will replace on low beam headlight for $15 +/- dollars in about 5 minutes.
headlight switch is probaly your trouble
The headlight has two filaments. One for the high beam and one for the low beam. The most likely reason the high beam is out is because the high beam filament is broken. Replace the bulb and it should fix it.
replace the high beam bulb
The Low Beam AND High Beam are in the same bulb. The procedure to change it will be in the owners manual.
Depending on the model year, you probably have one low beam bulb and one high beam bulb in each headlight.... unlike 90-94 323s that had one 2-filament bulb in each headlight.