The 2011 Hyundai Sonata takes H755 lamps. See sources and related links below for more bulb information.
These are H7 bulbs.
Lowbeam is an H7, highbeam/DTR is also H7
H11B Low beam. H1 High beam.
you need to replace the fuse for the headlights.
If both headlights in your 2003 Hyundai Sonata stopped working simultaneously, it could be due to a blown fuse, a faulty headlight relay, or a wiring issue. Check the fuse box for a blown headlight fuse, as this is a common cause. If the fuse is intact, inspect the headlight bulbs and wiring for any damage or corrosion. If the problem persists, it may require a closer inspection by a professional.
If you are afraid of breaking something take it to a garage.
The VW polo has headlight bulbs. If the headlights are not working, it may be a bulb has burnt out.
Before replacing the headlight bulbs on a 1997 Acura CL prop the hood open. Locate the headlight housing and remove the old bulbs. Install the new lights.
9004 Headlight Bulbs
H4
The headlight assembly (aka the headlight bucket) is removable by releasing the lock tabs behind the assembly. Once the assembly is wiggled out in the open you can easily replace the bulbs.
A Jaguar dealer is the primary place to find quality, factory direct headlight bulbs for a Jaguar luxury sedan. Major auto parts dealers also stock a wide variety of quality headlight bulbs. Autozone, Napa and other national chains are reliable places to find headlight bulbs for a Jaguar luxury sedan.