The brake/taillight on a 2013 Hyundai Elantra typically uses a 3157 dual‑filament bulb in each rear corner. This bulb covers both the tail light function and the brake light function in one package.
In practice, most US-market Elantras of this vintage use a 3157 or a 3157A variant for the brake/taillight. Variations can occur by trim level or market, so it’s wise to confirm by inspecting the existing bulb or checking the owner’s manual for your specific vehicle.
Common bulb type for the 2013 Elantra brake lights
Below are the bulbs most often used for the Elantra’s brake/taillight assemblies. This helps you identify what you should purchase if you’re replacing a failed bulb.
- 3157 dual‑filament bulb (red glass) – the standard choice for brake and tail light on many 2013 Elantras.
- 3157A variant – a closely related version that is compatible in most cases and may be listed for some markets or trims.
If you’re unsure, always verify by removing the existing bulb first or consulting the owner’s manual for your exact vehicle configuration.
How to verify and replace the brake light bulb
To ensure you install the correct bulb and complete the replacement safely, follow these steps and keep a few best practices in mind.
- Access the rear light housing from inside the trunk (or by removing the tail light assembly, depending on your model). Have a clean, well-lit workspace.
- Carefully remove the old bulb by turning the bulb socket counterclockwise and pulling it out of the housing.
- Note the bulb type printed on the side (3157 or 3157A) and the orientation of the tabs, then replace it with the same type. Handle the new bulb by the base, not the glass, and avoid touching the glass with bare fingers.
- Insert the new bulb into the socket, align the tabs, and twist the socket clockwise to lock it in place. Reconnect any wiring harnesses you may have disconnected.
- Test the brake and tail light by turning on the headlights and applying the brakes. If the light doesn’t illuminate, recheck the bulb seating and fuse/ wiring as needed.
Careful handling and correct seating are important to ensure proper illumination and to avoid damaging the bulb or housing.
Additional considerations for replacement
Tips to keep in mind when shopping for bulbs or performing the swap include using a high-quality replacement from a reputable brand, considering LED replacements only if you’re prepared for potential compatibility checks, and noting that some markets may list 3157 and 3157A interchangeably. If bulbs don’t light after replacement, double‑check the fuse and the socket contact points for corrosion or damage.
Summary
For a 2013 Hyundai Elantra, the common brake/taillight bulb is the 3157 dual‑filament type per rear side, with the 3157A variant as a closely related option. Always confirm by inspecting the current bulb or consulting the owner’s manual for your exact market and trim, and follow safe replacement practices to ensure reliable braking illumination.