The brake light on most 2003 Honda Accords uses a 3157 dual-filament bulb for the rear brake/taillight. Some markets or trims may use the 3157A variant. Confirm by inspecting the bulb installed in your car or consulting the owner's manual and the bulb socket.
Understanding the bulb type in the 2003 Accord
The rear brake light is part of the tail-light assembly. In most 2003 Accords, the brake/taillight portion relies on a 3157 dual-filament bulb, which provides both the tail light and the brighter brake light from the same unit. In certain markets or trims, a 3157A variant may be used, which is a similar bulb with a slightly different design.
How to identify the exact bulb for your car
To confirm the exact bulb code for your vehicle, examine the current bulb, consult the owner's manual, or look for markings on the bulb base. If you’re replacing, use the same code as the one removed.
- 3157 dual-filament bulb (standard for brake/taillight in most 2003 Accords).
- 3157A variant used on some markets or trims.
Note: Some late-production 2003 Accords may have a slightly different configuration, but the 3157 family remains the common choice for the brake/taillight bulb in most US-spec models.
How to replace the brake light bulb
Follow these steps to replace the brake light bulb on a 2003 Accord. Make sure you have the correct bulb type before starting.
- Open the trunk and locate the rear tail-light housing behind the lens.
- Remove any access covers, screws, or clips that secure the lens or assembly.
- Disconnect the wiring harness from the bulb/socket and twist the socket counterclockwise to release it.
- Remove the old bulb from the socket and note the orientation of the two filaments.
- Insert the new 3157 (or 3157A) bulb in the same orientation and re-seat the socket by turning it clockwise.
- Reconnect the wiring, reassemble the lens/assembly, and test the brake light by pressing the brake pedal with the ignition on.
Tips: Avoid touching the glass with bare fingers; oils can shorten bulb life. If the light still doesn’t work after replacement, inspect the socket, wiring, and fuses for issues.
Regional/trim variations to note
While the 3157/3157A bulb is standard for most 2003 Honda Accords, some regions or trims may use slightly different bulb codes or separate bulbs for the turn signal within the same taillight assembly. Always verify with your vehicle’s VIN, build sheet, or the owner’s manual to confirm the correct bulb.
How to confirm via official resources
For the most accurate specification, check Honda’s official parts catalog for your exact VIN or ask a dealer parts counter with your VIN. They can verify whether your car uses 3157 or 3157A in the brake/taillight circuit.
Summary
In short, a 2003 Honda Accord most commonly uses a 3157 dual-filament bulb for the brake/taillight, with the 3157A variant used in some markets or trims. Always verify by inspecting the bulb or consulting the owner's manual, and follow proper replacement steps to ensure proper operation of the brake lights.