The bulb type for a Crosstrek’s tail light depends on the model year and trim. In many older Crosstreks, the tail/brake/turn light uses a 3157 dual-filament bulb, with separate bulbs for the license plate and reverse light. Newer Crosstreks and higher trims increasingly rely on LED tail lights that may not use replaceable bulbs. To be sure, you should check your exact year/trim or consult the owner’s manual or a reliable parts diagram for your vehicle.
Tail lights are a critical safety component, and Subaru has varied its tail-light design across generations of the Crosstrek (XV) since its introduction in 2013. This article outlines the typical configurations you’re likely to encounter, how to verify the correct bulb quickly, and what to expect if your Crosstrek uses LED fixtures instead of replaceable bulbs.
Identify your Crosstrek generation and typical bulb configurations
Different Crostrek generations and trims use different rear-light setups. The following outlines common possibilities you may encounter when replacing a bulb or diagnosing a failure.
- First-generation Crosstrek (approximately 2013–2016): The outer tail light assembly typically uses a 3157 dual-filament bulb for the tail and brake/turn signals. The license plate light commonly uses a 194 bulb, and the reverse light in many models uses a 921 bulb. Note that some trims may have slight variations, so verify the exact socket by inspection or manual.
- Second-generation Crosstrek (approximately 2017–2023): Many trims continue to rely on replaceable bulbs for tail, brake, and turn functions (often still 3157), with the license plate light using 194 and the reverse light using 921. Some higher trims or special editions may incorporate LED tail-light modules, which do not require bulb replacements. Always verify by checking the bulb map in the owner’s manual or the bulb itself.
Both generations commonly use 3157 for multi-function tail/brake/turn, while 194 handles the license plate illumination and 921 is a common choice for reverse lights. However, LED-equipped versions may not have replaceable bulbs in the tail-light assemblies.
How to verify the exact bulb for your vehicle
To confirm the correct bulb size for your Crosstrek’s tail light, use these practical steps. This list explains how to identify the precise bulb you need before purchasing replacements.
Inspecting and confirming the bulb type on your Crosstrek
- Check the owner’s manual or a reputable Subaru parts diagram for your specific year and trim. The manual often lists bulb sizes by location (tail, brake, turn, license plate, reverse).
- Remove the tail light assembly or lens cover to visually inspect the bulb socket. Some bulbs have the size printed on the bulb base or on the socket label.
- If you’re replacing a failed bulb, pull the old bulb straight out, note the numbers printed on the base, and match them to a parts store or online listing. Bring the old bulb with you if you’re unsure.
- If the tail light housing uses an LED module, there may be no bulb to replace. In that case, you’ll replace the entire module or the dedicated LED unit, per the service manual or dealer guidance.
By following these steps, you’ll confirm whether your Crosstrek uses traditional bulbs (likely 3157, 194, and 921) or an LED assembly that involves different maintenance steps or replacements.
Replacement and maintenance tips
Here are quick tips to ensure safe and effective tail-light maintenance for your Crosstrek, whether you’re dealing with bulbs or LEDs.
- Bulb replacements: Always replace bulbs in pairs when practical to ensure uniform brightness and color, especially for tail/brake lamps.
- Handling bulbs: Avoid touching the glass with bare fingers, especially with halogen bulbs; oils can shorten bulb life. Use clean gloves or a cloth when handling bulbs.
- LED tail lights: If your Crosstrek uses LED modules, replacements may require a service visit or module replacement rather than individual bulbs.
- Fuse check: If the entire tail-light section fails, inspect the corresponding fuse as a quick troubleshooting step before replacing bulbs or modules.
Following these practices helps maintain visibility and safety on the road while aligning with your vehicle’s design—bulbs for older generations and LED modules for newer ones.
Summary
For the Subaru Crosstrek, the tail light bulb type historically centers on a 3157 dual-filament bulb for tail/brake/turn, with a 194 bulb for the license plate and a 921 bulb for the reverse light in many models. However, newer models and higher trims increasingly use LED tail-light assemblies that do not use replaceable bulbs. To determine the exact bulb for your car, check the owner’s manual or a trusted parts diagram for your specific year and trim, inspect the tail-light socket, and replace bulbs accordingly or consult a dealership if LEDs are installed.
Bottom line
Knowing the precise bulb type for your Crosstrek tail light requires identifying the model year and trim, then verifying via the manual or a trusted parts diagram. If your Crosstrek has LED tail lights, you may not replace individual bulbs at all—the module may need replacement through a dealer or service center.