2019 Honda Civic — Bulb Sizes (Headlight, Tail, Fog)

Quick reference

Notes:

• The 2019 Civic lineup (sedan, coupe, hatchback) spans many trims. LX/EX/EX‑L/Sport typically use halogen headlamps; Touring, Si, and Sport Touring hatchback use factory LED headlamps and often LED tail assemblies. LED assemblies are generally non‑serviceable at the bulb level.
• Always verify by VIN/trim or with your owner’s manual, as Canadian vs. U.S. spec and mid‑year updates can change specifics.

LED vs halogen upgrade considerations

• Headlights (H11/9005): Quality LED conversions can work well in the Civic’s halogen projectors, but beam pattern and glare control depend on LED emitter placement. Ensure the LED kit fits under the dust cap; some kits need low‑profile heat sinks. PWM/DRL interaction is usually not an issue for the headlamps on this model, but a CANBUS decoder may be required on some cars to prevent flicker.
• DRL: Most 2019 Civics use an integrated LED DRL in the headlamp that is not user‑replaceable. If it fails, the whole lamp typically needs replacement.
• Turn signals: Swapping 7444NA/7440 to LED will cause hyperflash unless you add resistors at each corner or use an LED‑compatible flasher (resistors are most common here). Choose switchback‑safe LEDs only if your trim uses a combined DRL/turn position (many Civics separate these).
• Fog lights (H11): Straightforward LED upgrades are common. Watch for heat and housing space; aim carefully to avoid foreground glare.
• Interior/markers/license/reverse: LED upgrades are plug‑and‑play for 194/168/921/31mm. Polarity matters on LEDs—flip the bulb if it doesn’t light.
• Warranty/electrical load: Avoid low‑quality LEDs that can trigger radio noise or early failure. Use name‑brand bulbs and match color temperature (5000–6000K) to factory LEDs for consistency.

How to replace each bulb

• Low beam (H11, halogen trims): Turn the wheel outward, pop back the front fender liner push‑pins for easier access if needed, remove the dust cap, rotate bulb counter‑clockwise, swap, and reseat the dust cap. Do not touch the glass.
• High beam (9005, halogen trims): Access from behind the headlamp in the engine bay; rotate counter‑clockwise to remove and swap.
• Fog light (H11): Access through the lower splash shield or by turning the wheel and removing a few liner clips. Rotate the bulb and withdraw from the housing.
• DRL (LED strip): Integrated; no bulb service. Replace the headlamp assembly if inoperative after basic checks.
• Front turn (7444NA) and front side marker (194): Both are in the headlamp housing. Access from the rear; twist the socket out, replace the wedge bulb, and lock back in.
• Rear turn (7440), brake/tail (7443), reverse (921): Open the trunk/hatch, remove the interior trim panel or service cover, twist the socket out, replace, and test. On hatchbacks, some bulbs are in the liftgate lamps—remove the liftgate trim to access.
• License plate (194/168): From outside, remove the lens screws or release tabs, pull the socket, replace the T10 bulb.
• Dome (31 mm festoon) and map (194): Use a plastic trim tool to pry the lens, swap bulbs, observing polarity for LEDs. Avoid metal tools to prevent marring.

Common lighting issues for this generation

• Moisture/condensation in headlamps or fog lamps: Often caused by unseated dust caps or damaged vent tubes, especially after bulb upgrades. Reseat caps and inspect seals.
• DRL/LED strip failure: On trims with LED headlamps, the DRL is part of the assembly; failure typically requires complete lamp replacement.
• Hyperflash after LED turn upgrades: Normal without load resistors or an LED‑compatible flasher. Mount resistors to metal away from wiring—they get hot.
• Melted or discolored 7443/7440 sockets: Use correct‑wattage bulbs and avoid over‑watt units. Replace heat‑damaged sockets.
• Flicker or radio interference with cheap LEDs: Choose CANBUS‑friendly, EMI‑suppressed bulbs from reputable brands.

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