The 2009 Honda Civic tail-light assembly uses three bulbs per side, not a single bulb size. Specifically, you’ll typically find a dual‑filament tail/stop bulb (3157), a separate turn-signal bulb (7443 or 7440, depending on market), and a reverse light bulb (921).
Tail-light composition and common sizes
These are the typical bulb sizes you’ll encounter in the Civic’s rear lamp assemblies. Note that sizes can vary by trim level and market, so always verify on your vehicle if possible.
- Tail/stop light: 3157 (dual‑filament), sometimes listed as 3157A in some regions
- Turn signal: 7443 or 7440 (single contact/dual‑filament depending on configuration)
- Reverse light: 921
In practice for many US‑market 2009 Civics, these three bulbs cover the tail, brake, turn, and reverse functions. If your market or trim differs, sizes may vary slightly. Always check the bulb itself or the owner's manual for the exact specification.
How to verify the exact bulb size on your car
To be certain of the correct bulb size for your specific vehicle, use one of these reliable methods:
Consult the owner’s manual’s bulb replacement section for the tail-light assembly, or look for a size code printed on the base of the installed bulb when you remove the lens. If you’re unsure or the car is a non‑US market variant, contact a Honda dealer or a trusted parts retailer with your VIN to confirm compatibility.
Market and trim differences
Bulb sizing can vary by market (for example, US vs. international versions) and by trim level. Always confirm by inspecting the bulb label, the lens, or official documentation for your specific Civic model and production year.
Summary
For a 2009 Honda Civic tail-light, expect three bulbs per side: 3157 for the tail and brake functions, 7443 or 7440 for the turn signal, and 921 for the reverse light. Because configurations can differ by market and trim, double‑check the exact sizes on your vehicle or via the owner's manual and, if needed, with a Honda dealer or parts supplier.