The brake lights on a 2015 Honda Civic primarily use a dual‑filament bulb in the 3157 family for the outer rear lamps.
In addition to the outer brake lights, the car’s center high‑mount brake light (the third brake light) may be LED or a separate bulb, depending on trim level. This article explains the typical bulb types, how to confirm yours, and how to replace them safely.
Main rear brake light bulbs
Most 2015 Civics use 3157 family bulbs for the left and right rear tail/ brake lamps. The 3157 is a dual‑filament bulb, providing one filament for the tail light and a brighter filament for the brake function. Depending on market or trim, the bulb may be listed as 3157 or 3157A in catalogs; verify by checking the bulb you remove or the owner's manual.
- 3157 (dual‑filament) is the most common replacement for the rear brake/tail lamps.
- 3157A is a variant sometimes listed in catalogs for the same socket; both fit the same housing but confirm the exact base on your bulb.
To avoid buying the wrong bulb, use the bulb stamping on your current bulb, check the owner's manual, or ask a dealer parts department with your VIN for the exact specification.
Center high‑mount brake light (third brake light)
The 2015 Civic's center brake light mounted on the rear deck is typically a separate lighting element. In many trims it uses an LED array; on some configurations, a small incandescent bulb or wedge may be used. Verify the exact type by consulting the owner's manual or inspecting the unit in place.
Replacement steps
When replacing any brake light bulb, take care to avoid damaging the lens or wiring harness. The following steps apply to the main rear brake light bulb:
- Turn off the vehicle and engage the parking brake. Open the trunk to access the rear light assembly.
- Remove the interior trunk panel or access cover to reach the bulb socket.
- Twist the bulb socket counterclockwise to release it, then pull it out of the housing.
- Disconnect the electrical connector from the bulb, then insert a new 3157 (or 3157A) bulb and reconnect the connector.
- Reinstall the socket into the housing, replace the access panel, and test the brake lights to ensure proper operation.
Tip: Do not touch the glass of the new bulb with bare fingers; oils can shorten bulb life. If the bulb is hot, allow it to cool before handling.
Summary
For a 2015 Honda Civic, the outer rear brake lights typically use a dual‑filament bulb in the 3157 family (3157 or 3157A). Confirm the exact part by inspecting the current bulb or consulting the owner's manual or parts catalog, and be aware that the center high‑mount brake light may use a different light source depending on trim. Replacing the bulb follows standard bulb handling steps to ensure a secure fit and proper lighting.