2024 Subaru Outback Bulb Sizes (Headlight, Tail, Fog)

Quick reference

The 2024 Subaru Outback offers a blend of lighting technologies depending on the trim level. Lower trims typically feature traditional halogen bulbs, while higher trims come equipped with advanced LED lighting systems for headlights, daytime running lights (DRLs), and sometimes even tail and brake lights. It's crucial to check your specific trim level to determine the exact bulb types in your vehicle.

For models with LED headlights, the LED components are often integrated into the headlight assembly and are not designed for individual bulb replacement. If an LED headlight component fails, the entire assembly may need to be replaced, which can be a more involved and costly repair.

LED vs Halogen Upgrade Considerations

Upgrading your halogen bulbs to aftermarket LED bulbs can significantly improve brightness, longevity, and provide a more modern aesthetic. However, there are several important factors to consider for your 2024 Subaru Outback:

• CANBUS Errors: Modern vehicles like the Outback utilize a Controller Area Network Bus (CANBUS) system to monitor various electrical components, including lighting. When you replace a halogen bulb with an LED, the lower power draw of the LED can trick the CANBUS system into thinking the bulb is out, triggering "bulb out" warning messages on your dashboard. To resolve this, you'll typically need to install CANBUS-compatible LED bulbs or use load resistors (also known as decoders) in conjunction with your new LED bulbs. Load resistors simulate the electrical load of a incandescent bulb, preventing error messages.

• Adapters Needed: Some aftermarket LED kits may require specific adapters to properly seat the new LED bulb into the factory housing. This is particularly true for headlight and fog light applications. Ensure any LED kit you purchase is compatible with your Outback's bulb design.

• Beam Pattern: With headlights, simply installing an LED bulb into a housing designed for a halogen bulb can sometimes result in a scattered or improper beam pattern. This can reduce effective illumination and potentially blind oncoming drivers. Look for LED bulbs specifically designed to mimic the filament placement of their halogen counterparts, or consider projector-style LED retrofits for the best beam output if your vehicle originally came with reflector housings.

• DRL/Turn Signal Functionality: For bulbs that serve dual functions, like DRLs and turn signals (7443), ensure that any LED replacement properly supports both high and low intensity functions without flickering or causing errors.

How to Replace Each Bulb (Short Tips per Location)

• Low Beam/High Beam (Halogen): Access is typically from behind the headlight assembly, often requiring removal of a plastic cover or air intake components. Twist to remove the old bulb, unplug, and install the new one. Avoid touching the glass of new halogen bulbs.
• Fog Light: Access is usually from underneath the front bumper or through the wheel well liner. You may need to remove a few clips or screws.
• Front Turn Signal/DRL: Often accessible by reaching behind the headlight assembly within the engine bay. Twist and pull to remove the bulb socket.
• Rear Turn Signal/Brake/Tail/Reverse: Access is typically from inside the trunk, behind the tail light assembly. You'll likely need to remove a carpeted panel or access cover to reach the bulb sockets. Twist to remove.
• License Plate: Usually a couple of screws hold the clear lens in place on the trunk lid or bumper. Carefully pry off the lens to access the bulb.
• Side Marker: For front markers, often integrated into the headlight or a small separate fixture. Rear markers are often LED integrated.
• Dome/Map Lights: Carefully pry off the clear lens cover using a plastic trim tool to avoid scratching the headliner or housing. The bulbs are usually push-in or festoon type.

Common Lighting Issues for This Generation

For the 2024 Subaru Outback, common lighting issues are relatively low, but can include:

• "Bulb Out" Warnings after LED Upgrades: As mentioned, this is a common issue when installing aftermarket LEDs without proper CANBUS decoders. Ensure you install quality components to avoid these warnings.
• Condensation in Headlight/Tail Light Assemblies: While less common in newer vehicles, condensation can sometimes occur if a seal is compromised or after extreme temperature changes. This often requires professional attention to prevent long-term damage.
• Flickering LEDs (Aftermarket): Poor quality aftermarket LED bulbs or improper electrical connections can lead to flickering issues. Ensure a secure connection and consider higher-quality LED options.
• DRL Malfunctions: On halogen models, the dual-filament DRL/turn signal bulbs can occasionally burn out. On LED integrated systems, a malfunction typically means a trip to the dealer.

Find a trusted shop on Repairius.