2015 Subaru Crosstrek Bulb Size Guide

Quick Reference

The 2015 Subaru Crosstrek, also known as the XV Crosstrek in some markets, primarily utilizes halogen bulbs for its exterior lighting. There were no factory LED options for the headlights or fog lights in this model year. Some higher trim levels might have featured different interior lighting packages, but the bulb sizes listed above are the most common.

LED vs Halogen Upgrade Considerations

Upgrading your 2015 Subaru Crosstrek's lighting to LED can offer significant benefits, including brighter output, a longer lifespan, and a more modern aesthetic. However, there are several key considerations to keep in mind:

• CANBUS Errors: Modern vehicles, including your Crosstrek, use a CANBUS (Controller Area Network Bus) system to monitor various electrical components. When you swap a halogen bulb for a lower-wattage LED, the vehicle's computer might detect a difference in electrical resistance and interpret it as a "bulb out" error, leading to a warning light on your dashboard or hyper-flashing turn signals. To prevent this, you'll need to use CANBUS-compatible LED bulbs or install load resistors in conjunction with your new LEDs.
• Adapters Needed: For headlights and fog lights, a common issue with LED upgrades is fitting the larger heat sink and fan assembly of an LED bulb into the tight confines of the Crosstrek's headlight housing. You might need specific adapters or modifications to ensure a proper and secure fit. Always check the dimensions of the LED bulbs against the available space before purchasing.
• Beam Pattern: Not all LED bulbs are created equal. Poorly designed LED bulbs can create an unfocused light beam with dark spots or excessive glare for oncoming drivers, even when properly aimed. Look for reputable brands that specifically design their LED bulbs to mimic the beam pattern of the original halogen bulbs to ensure optimal light distribution and safety.
• DRL Functionality: The 2015 Crosstrek uses the same bulb (9005) for both high beams and daytime running lights (DRLs), operating at different wattages. If you upgrade to LED high beams, ensure that the LED bulbs are designed to handle both full-power high beam operation and reduced-power DRL operation without flickering or premature failure. Some LED kits require a separate DRL harness or CANBUS decoder to function correctly in DRL mode.

How to Replace Each Bulb

Replacing bulbs on your 2015 Crosstrek is a relatively straightforward DIY task for most locations. Always refer to your owner's manual for specific instructions and safety precautions.

• Low Beam (H11) & High Beam/DRL (9005): Access is typically from behind the headlight assembly in the engine bay. You may need to remove a plastic cover or air intake duct to gain sufficient access. Twist the bulb counter-clockwise to remove.
• Fog Light (H11): These are usually accessed from underneath the front bumper or by removing the plastic fender liner in the wheel well. Some models might require removing the fog light housing.
• Front Turn Signal (7440NA): Access is generally from behind the headlight assembly in the engine bay. Twist the bulb socket to remove it from the housing.
• Rear Turn Signal (7440NA), Brake Light & Tail Light (7443), Reverse Light (921): These bulbs are all located within the tail light assembly. Open the tailgate and remove the access panel(s) on the inside of the tail light housing to reach the bulb sockets. Twist the socket to remove the bulb.
• License Plate (168): These bulbs are typically accessed by removing a couple of screws that hold the license plate light housing in place on the tailgate.
• Side Marker (168): These are integrated into the headlight assembly or fender. You'll likely need to access them from the wheel well or by going through the engine bay like the headlights.
• Dome Light (DE3175) & Map Lights (168): Carefully pry down the plastic lens cover using a trim removal tool or a small flathead screwdriver. The bulbs are usually held in by clips or simply pull straight out.

Common Lighting Issues for this Generation

Owners of the 2015 Subaru Crosstrek occasionally report a few common lighting issues:

• Premature Bulb Failure: While generally reliable, some owners have reported certain incandescent bulbs (especially brake lights and front turn signals) failing more frequently than expected. This can sometimes be attributed to vibrations or voltage inconsistencies. Replacing with higher-quality bulbs or upgrading to LEDs can mitigate this.
• DRL Malfunctions: Issues with the DRLs not illuminating or flickering can sometimes occur, often related to the shared high beam bulb and its specific wiring for DRL functionality. Before suspecting an electrical problem, check the 9005 bulb itself.
• Fog Light Condensation: While not a bulb issue, some Crosstrek owners have noted condensation inside the fog light housings. This can obscure light output and potentially lead to premature bulb failure. Ensuring a tight seal after bulb replacement is crucial.

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