The rear brake/taillight in most 2013 Subaru Outback models uses a dual‑filament bulb, typically a 3157 type, though regional trims can vary. Confirming the exact bulb by checking the existing bulb or the owner's manual will ensure a correct replacement.
Common bulb type for the 2013 Outback rear brake lights
Regional and trim variations
In the rear outer taillight assemblies, the standard bulb is usually a dual‑filament 3157. Some markets or trims may use a 3157A or another variant with the same base. The center high‑mount brake light (the third brake light on the rear shelf) uses a different lamp arrangement and is not part of this discussion about the outer taillights.
- 3157 dual‑filament bulb (typical for brake and tail functions in the rear outer taillight).
- 3157A or similar variant (alternate base used in certain markets or trims).
Bottom line: the standard bulb for the brake/taillight is typically 3157, with potential regional variants. Always verify by inspecting the bulb itself or consulting the official Subaru parts diagram for your VIN.
How to verify the exact bulb in your car
To avoid guessing, follow these steps to confirm the correct bulb before purchasing a replacement.
- Identify the correct taillight housing that contains the brake light (outer rear assembly vs. center high‑mount brake light).
- Power off the vehicle and open the trunk or hatch to access the taillight assembly.
- Remove the taillight bulb by rotating the socket or removing the retaining clips per the owner's manual.
- Read the markings on the bulb itself (look for codes like 3157 or 3157A) and note the base type.
- Cross‑check the bulb code with Subaru’s official parts diagram or a trusted parts retailer using your vehicle’s VIN.
- Purchase the correct bulb (most often a 3157 dual‑filament) or the specified variant if your region/trim requires it.
These steps will help you confirm the exact bulb type and avoid buying the wrong part. While many 2013 Outbacks share the same bulb type, exact fit can vary by market and trim level, so verification is prudent.
Where to source the replacement and what to buy
Once you know the exact code, you have several purchasing options. Here are common sources and what to look for.
- Auto parts stores (e.g., AutoZone, O'Reilly, Advance) typically stock 3157 dual‑filament bulbs for quick in‑person pickup.
- Subaru dealership parts departments provide genuine bulbs matched to your VIN and regional specs.
- Online retailers and automotive marketplaces often list 3157/3157A bulbs; ensure you choose the correct base and dual‑filament configuration for the rear brake/taillight.
Tip: if you’re considering LEDs as a replacement, be aware that some vehicles require CAN‑bus compatible LEDs or load resistors to prevent hyper‑flashing or bulb error warnings. Check compatibility with Subaru and your local regulations before upgrading.
Replacement tips and best practices
When replacing a rear brake light bulb on a 2013 Outback, follow these guidelines to ensure a safe and reliable install.
- Handle bulbs with clean gloves or a cloth to avoid oil contamination on the glass, which can shorten bulb life.
- Test the brake light function before reassembling the taillight housing to confirm the new bulb works and that the taillight and brake timing are correct.
- Consider replacing both outer taillight bulbs on the same side (or both sides) if they’re aging, to maintain equal brightness and color.
Following proper handling and testing practices helps ensure a longer bulb life and consistent lighting on both sides of the vehicle.
Summary
For a 2013 Subaru Outback, the rear brake/taillight bulb is most commonly a 3157 dual‑filament type, with possible regional variants such as 3157A. Always verify by examining the existing bulb or consulting the owner's manual or Subaru parts diagrams for your VIN. Source from reputable retailers, and consider CAN‑bus compatibility if upgrading to LEDs. Replacing bulbs in pairs can help maintain balanced brightness and color across the rear lights.