You can replace the tail light bulbs by removing the rear trunk access panel, detaching the bulb socket, swapping in new bulbs of the same type, and reassembling. It’s a manageable task for most DIYers and requires only basic tools.
In more detail: The 2006 Forester uses a composite rear tail light assembly that houses the tail/parking light, brake light, and turn signal in a single unit on each side. Access is gained from the cargo area by removing an interior panel and then loosening the lens/trim to reach the bulbs. Always handle bulbs with care to avoid skin oils on the glass, and confirm the correct bulb type by checking the old bulb or the owner’s manual before purchase. If you notice moisture in the lens, inspect seals and reseal as needed. For electrical work, ensure the ignition is off and the battery is disconnected if you’re working near wiring.
What you’ll need
Prepare these items so you can perform the replacement efficiently and safely.
- Replacement bulbs that match the original type (check the old bulbs or the owner’s manual for exact part numbers)
- Basic hand tools: a small screwdriver or trim tool; and any screws needed to remove the panel
- Gloves or a microfiber cloth to handle bulbs without touching the glass
- Rag and optional silicone sealant if you notice moisture in the lens
Having the correct bulbs and tools on hand helps keep the job clean and quick without multiple trips to the store.
Accessing the tail light assembly
Access the rear lamps from the cargo area, then free the tail light housing to reach the bulb sockets.
- Open the tailgate and remove the interior cargo area panel or trim that covers the tail light housing using a trim tool or small screwdriver to release clips.
- Locate and remove the screws that secure the tail light housing to the vehicle body (typically a couple of small screws)
- Gently pull the tail light assembly outward, keeping tension on the wiring harness connected at the back
- Disconnect the electrical connector from the tail light housing by pressing the release tab and pulling straight back
With the assembly free, you can access the bulb sockets from the back and begin the replacement process.
Replacing the bulbs
Swap bulbs one at a time, ensuring you insert the correct type and seating. Do not touch the glass with bare hands; oils can shorten bulb life.
- Twist the bulb socket a quarter-turn counterclockwise (or release the bulb retaining clip, if present) to access the bulb
- Carefully remove the old bulb from the socket and dispose of it
- Insert the new bulb into the socket, making sure it sits firmly and is properly seated
- Reinstall the bulb socket back into the tail light housing and lock it by turning clockwise or re-engaging the clip, as applicable
- Repeat the process for any additional bulbs in the same housing
Once all bulbs are replaced, reconnect the wiring harness to the tail light housing and reattach the assembly to the vehicle body, securing screws and hardware.
Testing and resealing
Test each function before finalizing: parking/tail lights, brake lights, turn signals, and reverse lights. Check for moisture and reseal if needed.
- Turn the ignition to ON and switch on the running lights to check the tail lamps
- Depress the brake pedal to test the brake lights
- Activate the left and right turn signals to verify the signal bulbs
- Put the transmission in reverse to check the reverse lights
- Inspect the lens seal around the housing for any gaps or moisture; reseal if moisture is present
If any bulb does not illuminate, recheck the bulb seating, socket connection, and fuse for that circuit. If condensation persists, inspect the gasket around the lens or seek professional help.
Summary
Replacing the tail light bulbs on a 2006 Forester is a straightforward DIY task. By gathering the right bulbs and tools, accessing the tail light housing from the cargo area, carefully swapping bulbs, and testing all functions, you can restore full visibility and road-safety compliance. Always verify bulb types with the owner’s manual or the original bulbs, handle bulbs with care, and consult a professional if you encounter seal or electrical issues.