2016 Toyota Highlander — Bulb Sizes (Headlight, Tail, Fog)

Quick reference

Notes

• Sizes above reflect the most common U.S. market 2016 Highlander (LE/LE Plus/XLE/Limited/Limited Platinum). Verify on‑vehicle before ordering—running changes and supplier differences exist.
• No factory HID headlights were offered for 2016; LED DRL accents on higher trims are non‑serviceable modules.

LED vs halogen upgrade considerations

• Headlights (H11/9005): Quality LED conversions can work in the halogen projector (low) and reflector (high) housings, but choose slim LED emitters with correct focal position. Large heat sinks may interfere with dust caps; low‑profile fans or passive blades help. Because the 9005 also functions as a PWM‑driven DRL on many trims, some LED 9005 bulbs will flicker. Look for “DRL‑compatible” 9005 LEDs or add a dedicated anti‑flicker/canbus module.
• Fog lights (H16): Many LED kits are labeled H11/H16. The Highlander uses the lower‑wattage H16 spec; ensure the collar and indexing tabs match and that output is controlled to avoid glare.
• Turn signals (7440/7444): Switching to LED will cause hyperflash. Fix with load resistors (approx. 6Ω, 50W) wired in parallel at each corner or an LED‑compatible flasher if available. Ensure amber LEDs for front/rear turns.
• Stop/tail (7443): Use dual‑intensity 7443 LEDs. Toyota wiring is typically standard (non‑CK), but verify pinout before installation to avoid reversed functions.
• License/map/markers/interior: Generally plug‑and‑play T10 and festoon LEDs; polarity matters on most LEDs.
• CANBUS: The 2016 Highlander isn’t overly sensitive, but bulb‑out warnings and hyperflash can occur with exterior LEDs. Use CANBUS‑ready lamps or add resistors where needed.

How to replace each bulb

• Low beam (H11): Turn the wheel straight, open hood. Remove the round dust cap on rear of headlamp, rotate bulb counter‑clockwise, unplug, swap H11. Do not touch halogen glass; reseat the cap.
• High beam/DRL (9005): Access from behind headlamp without removing the cap. Twist counter‑clockwise, unplug, replace 9005, lock back in.
• Fog light (H16): Turn front wheels outward. Remove a few clips in the fender liner to reach the fog housing, rotate bulb, replace with H16, test before re‑securing liner. Some trims may require access from beneath with the splash shield loosened.
• Front turn and side marker (7440A, 168): Access sockets on the back of the headlamp. Twist each socket out, replace the wedge bulb (amber for turn), reinsert and lock.
• Tail/brake (7443) and rear turn (7440): Open liftgate. Remove two screws on the lamp’s inboard edge, pull the assembly straight rearward to release clips. Twist the appropriate socket, swap bulb, and reassemble.
• Reverse (921): In the same tail lamp assembly, identify the clear lens socket, twist out, replace 921, test.
• Rear side marker (168): Small socket on the tail lamp’s outer edge; twist and replace.
• License plate (168): From outside at the hatch garnish, pop the lens or remove the small screw depending on build, twist socket, replace.
• Interior map (T10): Pry the clear lens gently with a trim tool, pull T10 bulb, insert LED or halogen, test before snapping lens back.
• Dome (31mm) and cargo (31mm): Pry the lens, release spring clips, swap festoon. Observe polarity with LEDs.

Common lighting issues for this generation

• Moisture in headlamp or tail lamps: Early XU50 trucks sometimes show condensation after heavy rain. Ensure vent caps are seated and dust caps fully sealed; replace cracked housings if pooling is present.
• Premature 9005 burnouts: Because the high beam doubles as a DRL on many trims, the 9005 runs often. Carry a spare or upgrade to a quality long‑life bulb.
• Hyperflash after LED swaps: Normal when converting 7440/7443 to LED—add resistors or an LED‑rated flasher.
• Fog lamp wear: Road rash and pitting of lenses can reduce output; consider clear film protection or periodic polishing.
• Melted sockets from high‑wattage bulbs: Avoid over‑watt halogens in 7443/7440 locations; stick to OEM wattage or quality LEDs.
• Brittle tail lamp clips: When removing the rear lamp, pull straight back to avoid breaking locating pegs.

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