2025 Nissan Titan — Bulb Sizes (Headlight, Tail, Fog)

Quick reference

Note: Nissan ended Titan production for the North American market after the 2024 model year. If your truck is registered as a 2025 or sold as a carryover, bulb fitments mirror the 2020–2024 Titan. Trims with factory LED headlamps and LED tail lamps (e.g., PRO-4X, Platinum Reserve, select SV packages) use sealed LED modules that are not serviceable by bulb size.

LED vs halogen upgrade considerations

• Headlights: Base S/SV halogen assemblies typically accept H11 (low) and 9005 (high). Upgrading to LED bulbs can trigger CANBUS bulb‑out warnings or radio noise on some trucks. Choose CANBUS‑ready H11/9005 LEDs and be prepared to add anti‑flicker/decoder modules if you see pulsing or errors. Do not attempt to retrofit LED bulbs into factory LED projector housings; those are sealed.
• DRL behavior: On halogen housings the high beam often doubles as DRL at reduced voltage; there is no separate DRL bulb. LED conversions for the high beam should be compatible with PWM DRL control.
• Front/rear turn signals: Replacing 7444NA/7440 with LEDs will likely cause hyperflash. Use LED bulbs with built‑in resistors or add 6Ω load resistors per side, spliced between the turn positive and ground.
• Exterior small bulbs: 168/194 and 921 upgrades are generally plug‑and‑play. CANBUS errors are uncommon on these circuits, but choose quality non‑polarized LEDs to avoid orientation issues.
• Interior: 31mm festoon and 194 map LEDs are easy upgrades. Pick warm white (3000–4000K) for OEM look or 5000–6000K for bright white.

How to replace each bulb

• Low beam (H11): Turn the wheel inward for access, open the fender liner service door, twist the H11 counterclockwise and pull straight out. Avoid touching the glass on halogen bulbs.
• High beam (9005): Access from behind the headlamp, twist counterclockwise to remove. Verify seating tabs align on reinstallation.
• Fog light (H11): Access from underneath the bumper or through the lower liner. One quarter‑turn releases the bulb.
• DRL: No separate bulb on halogen setups. On LED headlamps, the DRL is integrated—service requires replacing the lamp assembly.
• Front turn (7444NA): Access at rear of headlamp, rotate the socket, and pull. Match amber color (NA suffix) if staying incandescent.
• Rear turn (7440): Open the tailgate, remove tail lamp screws, pull the lamp straight back, rotate socket to service.
• Brake/Tail (7443): Same tail lamp removal; 7443 is dual‑filament—ensure correct orientation so bright filament is for brake.
• Reverse (921): Remove tail lamp as above, swap the 921 wedge bulb.
• License plate (194): Release the license lamp lens from the tailgate/bumper, pull the 194 wedge, replace.
• Side markers: Front side marker is part of the headlamp (194) on halogen housings; service at the headlamp rear. Rear side marker is integrated in many trims; if separate 194 socket is present, service like the tail lamp bulbs.
• Dome (31mm festoon): Pry the lens gently, pop out festoon, observe polarity for LED.
• Map (194): Pry lens, pull the wedge bulb straight out; use non‑marring tools to avoid scuffs.

Always disconnect the battery when working near airbag circuits or if your hands will be inside tight harness areas, and test lights before reassembling trim.

Common lighting issues for this generation

• Moisture in headlamp or tail lamp: Check housing vents and seals; replace the cap gaskets. Persistent condensation may require a new lamp assembly.
• Hyperflash after LED swaps: Install proper load resistors or CANBUS‑rated LED bulbs, and verify clean grounds at the lamp sockets.
• Flicker on LED headlight conversions: Add PWM decoders/anti‑flicker harnesses if your truck uses pulse‑width DRL control on the high beam circuit.
• Socket heat damage: Over‑wattage bulbs can overheat 7440/7443 sockets. Stick to OEM wattage or quality LEDs.
• Fog lamp access difficulty: Removing a few lower splash shield clips dramatically improves access and prevents broken tabs.

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