A dark trunk on a 2016 Honda Civic sedan may be caused by a burned-out 5-watt cargo-area bulb, but a loose connector, damaged socket, wiring fault or a trunk-latch switch problem can look similar. This guide covers the original sedan trunk-light housing with a removable 168 miniature wedge bulb. It does not cover the coupe, hatchback, a modified LED fixture or the Civic’s factory LED license-plate light. There is no dedicated OBD-II diagnostic code for this interior lamp.
Easy
10–20 minutes
$7–$15 for a two-pack
Safety before you start
The trunk lamp can be powered whenever the trunk is open. If it was illuminated, let the glass cool before touching the housing. Use a plastic trim tool when possible, keep metal tools away from exposed terminals and do not bridge the socket contacts. Disconnect the lamp’s electrical plug before pulling the old bulb. Handle the new glass only with clean gloves or a clean, dry towel.
This bulb-only job requires no vehicle lifting, battery disconnection, fluid, programming, relearn or torque specification. Stop if the housing is cracked, the connector is melted, wiring is exposed, the fixture does not match the description below or the trunk cannot be secured safely.
Confirm the application before buying
| Vehicle | Supported equipment | Engine / drivetrain | Important exclusions |
|---|---|---|---|
| 2016 Honda Civic four-door sedan, U.S./Canada specification | Original trunk/cargo light in the ceiling of the trunk, between the rear-deck speaker areas, with a removable 12V 5W wedge bulb | 1.5L turbo or 2.0L gasoline; FWD. The installed fixture remains the final fitment check. | Coupe, hatchback, other years or markets, aftermarket housings, LED conversions, and any sealed or differently retained fixture. Not for the factory LED license-plate light. |
Open the trunk and look upward at the cargo-area ceiling between the rear speaker locations. The supported housing has a small release notch on its right, or passenger, side and a white electrical connector. The original demonstrated bulb is marked 12V 5W and uses the common 168 wedge form. If your fixture, connector or retention method differs, identify the installed part before proceeding.
Symptoms and diagnosis before replacement
- Likely bulb failure: the trunk light stopped working after normal use, the housing and connector look clean, and the old filament is visibly broken or the bulb tests open.
- Check the connection: a lamp that flickers when the housing or connector moves may have a loose terminal, oxidized contact or damaged socket rather than a simple bulb failure.
- Check the trunk-latch signal: if other trunk-open behavior is abnormal, the vehicle may not be recognizing that the trunk is open. Replacing the bulb will not repair a latch switch or related circuit.
- Look for heat or water damage: discoloration, melted plastic, green corrosion, moisture or burned wiring calls for circuit and housing diagnosis before another bulb is energized.
A scan tool is not required for a straightforward burned-out trunk bulb, and no generic OBD-II engine code proves this lamp has failed. If a known-good bulb still does not illuminate, or if a replacement fails repeatedly, diagnose the socket, connector, wiring and trunk-open control instead of installing more bulbs.
Featured replacement bulb
SYLVANIA 168 Long Life Mini Bulb
Manufacturer part number: 168LL.BP2
Amazon ASIN: B01FWODPFA
Selected variation: 168 Long Life incandescent miniature bulbs, one two-pack
Quantity: two bulbs; the Civic trunk uses one, leaving one spare.
The package includes two 168 incandescent wedge bulbs. It does not include the housing, lens, socket, connector, wiring, seals, trim tool or gloves. SYLVANIA identifies 168 as the OE bulb number and describes this product as a direct replacement suitable for trunk and dome-light applications. Confirm the marking and wedge base against the removed bulb before installation.
Check the exact SYLVANIA 168 two-pack
Purchase activity recorded for this exact ASIN: “300+ bought in past week,” retrieved October 20, 2026 from a cached Amazon result whose crawl was labeled “last week.” This is Amazon’s rounded indicator, not an audited sales total or a live stock/price statement.
Tools and supplies
| Tool or Supply | Exact Product | Product Link | Purpose and Selection Check |
|---|---|---|---|
| Required replacement bulb | SYLVANIA 168 Long Life, 168LL.BP2, two-pack | Exact ASIN B01FWODPFA | One 12V 5W 168 wedge bulb is used. Compare base, markings and fixture before fitting. |
| Required access tool | Small nylon trim/pry tool already owned | No purchase needed | Fits the passenger-side notch and reduces the chance of marring the housing. A small flat screwdriver wrapped to protect the trim is an alternative, but keep metal away from contacts. |
| Required handling aid | Clean lint-free towel or clean gloves already owned | No purchase needed | Keeps skin oil off the new glass. Use a clean, dry, grit-free surface. |
| Optional inspection light | Battery flashlight already owned | No purchase needed | Lets you inspect the socket after the trunk lamp is unplugged. Do not prop a phone where it can fall into the work area. |
Estimated DIY and shop cost
DIY estimate: about $7–$15 for a two-pack of 168 bulbs, with no consumables and no added tool cost if you already have a small plastic pry tool and clean handling cloth. The official SYLVANIA page displayed $7.99 when checked, but retailer pricing and availability can change.
Professional estimate: roughly $25–$70 for a simple bulb replacement, depending on local minimum labor charges and whether diagnosis is needed. Socket, connector, latch-switch or wiring repair would cost more. These ranges are planning estimates, not a local quote or a current Amazon price.
2016 Honda Civic sedan trunk-light replacement steps
- Park and secure the vehicle. Choose a level, well-lit location, select Park, apply the parking brake and switch the vehicle off. Remove loose cargo that could interfere with your reach.
- Open the trunk and identify the supported housing. Look upward in the trunk ceiling between the two rear-deck speaker areas. Confirm the small release notch on the housing’s right, or passenger, side. Do not start if your housing is different.
- Let the lamp cool. Because the trunk light may illuminate while the lid is open, wait several minutes if the bulb was on. Do not grip hot glass.
- Release the housing. Insert a small nylon pry tool into the right-side notch. Gently lever the right side down only far enough to release its retaining clip. Pull the housing down carefully without yanking the wires.
- Disconnect electrical power at the fixture. Support the housing, press the release tab on the white connector and slide the plug straight out. Never pull on the wires. With the connector detached, inspect for heat damage, corrosion, bent terminals or moisture.
- Remove the old bulb. Once cool, pull the miniature wedge bulb straight out of the socket. Work from its base and avoid bending the socket contacts. If it resists, push gently and evenly at the base rather than levering against the glass.
- Compare old and new parts. Confirm the removed lamp is a 12V 5W miniature wedge bulb matching the 168’s base and dimensions. If the old part or fixture does not match, stop and identify the correct component.
- Install the new 168 bulb. With clean gloves or a clean towel, hold the new bulb by its base and press it straight into the socket until fully seated. Do not twist the glass and do not touch it with bare fingers.
- Reconnect and test before closing the housing. Push the electrical connector straight into the housing until its lock engages. The trunk lamp should illuminate while the trunk-open circuit is active. Keep fingers clear of the bulb as it warms.
- Reinstall the housing. Guide the wires into the opening without pinching them. Insert the left side first, then press the right-side retaining clip upward until the housing sits flush and secure.
- Complete the functional check. Verify steady illumination, gently confirm the housing does not rattle, and close then reopen the trunk to confirm normal operation. If the bulb flickers, remains dark or fails again, stop replacing bulbs and diagnose the circuit.
No threaded fastener is disturbed in this documented procedure, so there is no applicable torque value.
Final inspection checklist
- The 168 bulb is fully seated and illuminates steadily.
- The connector latch is engaged and no wire is pinched.
- The housing sits flush, with the left side located and the right clip locked.
- No plastic is melted, cracked or discolored and there is no moisture or corrosion.
- The lamp responds normally when the trunk is closed and reopened.
- The spare bulb is stored dry in its packaging, not loose where it can break.
Common mistakes to avoid
- Buying for the wrong lamp: the 2016 sedan’s trunk light is specified at 5W, while Honda lists the license-plate light as LED. Do not transfer this bulb choice to the license-plate position.
- Applying fitment to every tenth-generation body: this guide is narrowed to the sedan fixture demonstrated above. Coupe, hatchback and other-market housings require their own verification.
- Prying from the wrong side: use the small notch on the housing’s passenger side and release the clip gently.
- Pulling the wires: depress the connector latch and pull the connector body, not the harness.
- Touching or levering the glass: skin oil contaminates the bulb, and side-loading glass can break it. Handle the base with a clean barrier.
- Ignoring repeat failures: repeated burnout, flicker, heat or corrosion indicates a fault that a fresh bulb alone will not fix.
Frequently asked questions
What bulb does the 2016 Honda Civic sedan trunk use?
Honda specifies a 5-watt trunk light. The original 2016 sedan demonstration identifies the removable 12V 5W wedge lamp as a common 168 bulb. Confirm the installed housing and removed bulb before ordering.
Does one two-pack service the whole trunk light?
Yes. The supported sedan fixture uses one bulb, so the selected SYLVANIA two-pack supplies one replacement and one spare. The package does not include any housing or electrical parts.
Can I use an LED 168 replacement?
Some 168-format LED products may physically fit, but brightness, polarity, heat management, color and electrical behavior vary. This guide validates the incandescent SYLVANIA 168LL.BP2 only; do not assume an unverified LED conversion is equivalent.
Why is the new bulb still dark?
Reseat the bulb and connector, then inspect the socket. If a known-good bulb remains dark, investigate the trunk-latch switch input, wiring, connector and power/ground rather than continuing to install bulbs. Melted plastic or exposed wiring calls for qualified repair.
Is a torque wrench or battery disconnect required?
No threaded fastener is removed and no torque specification applies. The documented sequence isolates the lamp by unplugging its fixture after the housing is lowered. Do not improvise other electrical work within this bulb-only procedure.
Sources and related Civic guides
- 2016 Honda Civic Sedan Owner’s Guide — sedan coverage and 5W trunk-light specification.
- Paul’s Travel Pictures: 2016–2019 Civic sedan trunk-light guide — original 2016 vehicle demonstration, housing access, connector release and 168/12V5W identification.
- SYLVANIA 168LL.BP2 product page — exact product, OE number 168, two-pack and handling guidance.
- Vehicle-reference photograph and license — Bull-Doser, public-domain release.
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