On a 2018 Subaru Impreza sedan, replacing the tail light bulb is a straightforward DIY task. To fix a burned-out tail light, access the bulb from the trunk, remove the old bulb, and install a like-for-like replacement.
In this guide, we’ll walk you through identifying the correct bulb, gathering tools, and performing the swap safely, including checks after replacement and tips if anything doesn’t light up. Always verify the exact bulb type for the specific tail-light position in the owner’s manual or on the bulb label inside the housing.
What you’ll need
Having the right supplies on hand before you start will help the process go smoothly and minimize the chance of damaging trim or wiring.
- Replacement bulb(s) of the correct type for the tail light (check the owner’s manual or the bulb label on the housing to confirm the exact part number)
- Clean gloves or lint-free cloth to handle the new bulb (bare skin oils can shorten bulb life)
- Flat-head screwdriver or trim tool (optional, for releasing interior panels)
- Small container or magnetic tray to hold screws or fasteners
- flashlight if lighting is dim in the trunk area
Having these items ready helps ensure you can complete the replacement without searching for parts mid-job.
Step-by-step replacement
Follow these steps in order to correctly swap the tail light bulb.
- Park the car on a level surface, turn off the ignition, and engage the parking brake. If you’ve recently driven, allow the tail light assembly to cool before touching any components.
- Open the trunk and locate the tail light access area. Remove the trunk lining or access panel behind the tail light by peeling back the carpet or paneling, or by removing any visible screws or fasteners as needed.
- Disconnect the electrical connector from the tail light bulb socket by pressing the release tab and pulling gently.
- Rotate the bulb socket counterclockwise within the housing to unlock it, then pull the socket out of the tail light assembly.
- Remove the old bulb from the socket by pulling straight out. If it’s a dual-filament bulb, note the orientation so the new bulb installs correctly.
- Handle the new bulb with a clean glove or cloth. Insert the bulb into the socket, ensuring it seats securely and aligns with the socket tabs.
- Reinsert the socket into the tail light housing and twist clockwise to lock it in place. Reconnect the electrical connector firmly.
- Test the tail light by turning on the vehicle lights and applying the brake to confirm the taillight, brake, and turn signal functions (if applicable) operate correctly.
- Replace the trunk lining or access panel and any screws you removed. Close the trunk and perform a final exterior light test from outside the vehicle.
If the new bulb doesn’t illuminate, double-check that you installed the correct bulb in the right position, ensure the connector is fully seated, and verify the fuse related to the tail lights in the fuse box. If other lights on the same circuit are out, a fuse or wiring issue may be involved.
Special considerations and safety tips
These notes can help prevent damage and ensure a reliable repair.
- Avoid touching the glass portion of the new bulb with bare fingers; oils can shorten bulb life. Use gloves or a clean cloth.
- If you cannot access the bulb from the trunk area, you may need to remove the entire tail light assembly from the exterior using the appropriate screws. In that case, consult the owner’s manual for model-specific instructions.
- If you’re replacing the bulb due to a cycling or interlock issue, consider checking related fuses or the body control module in addition to the bulb itself.
In most cases, the replacement is a simple swap, and you’ll be back on the road with properly functioning tail lights in under an hour.
Additional notes and alternatives
Some Impreza trims or model years may use different bulb configurations for the tail light and turn signal. Always confirm the exact bulb type for each position (tail, brake, turn, reverse) before purchase. If you’re unsure, a dealership parts department or a reputable auto parts store can verify the correct bulb by providing your vehicle’s VIN or year, make, and model.
Summary
Replacing a tail light bulb on a 2018 Subaru Impreza sedan is a routine maintenance task that most drivers can perform themselves. Identify the correct bulb, access the bulb socket from the trunk, swap in a new bulb with care, and test functionality before reassembling. If problems persist, check fuses and wiring, and consult the owner’s manual for model-specific guidance.