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Parts for your 2015 Toyota Bb-Interior bulbs
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2015 Toyota bB interior bulbs — what they do and how to look after them
Interior bulbs are absolutely fitted to the 2015 Toyota bB. Toyota’s own technical literature confirms it: the Toyota bB Owner’s Manual for the QNC20/21 series (2015 printing), the Toyota Repair Manual (Lighting — Interior Illumination), and the Toyota Electronic Parts Catalogue all list the interior dome, map and luggage compartment lamps. Those sources specify common wedge and festoon types (typically W5W/T10 and 31 mm festoon) used in the cabin and boot areas.
In everyday use, these bulbs take care of cabin visibility — map/reading lights up front, a centre dome for general cabin light, and a luggage/boot lamp so gear can be seen after dark. They’re simple, inexpensive, and make the bB’s boxy, practical interior even easier to live with on winter mornings or late-night runs.
Servicing or replacing them is straightforward. Always switch the ignition and interior light switches off first. Use a plastic trim tool to pop the lens without scuffing the trim. With halogen bulbs, avoid touching the glass, oils from fingers can shorten bulb life. Match wattage and fitment to the owner’s manual or lamp markings. If upgrading to LED, choose quality T10/W5W and 31 mm festoon LEDs that fit under the lens, and note LED polarity — if a new LED doesn’t light, rotate it 180 degrees. After fitting, test the DOOR/ON/OFF settings and check the gradual dim function behaves normally.
- Front map/reading lamps: T10 (W5W) wedge, approx. 5 W (many owners choose LED replacements)
- Centre dome lamp: Festoon, commonly 31 mm, 5–8 W equivalent
- Luggage/boot lamp: T10 (W5W) wedge
A few trims may come with factory LED modules in certain positions, these aren’t “blown bulb” serviceable and are replaced as an assembly per the Repair Manual. If an interior lamp is out across the board, check the DOME fuse (typically 7.5 A in the driver’s side junction block) and confirm the lamp switch isn’t set to OFF. Cleaning the lenses and contacts yearly, and keeping to the specified wattage, helps prevent heat haze and brittle lenses. For a nicer cabin vibe, warm white LEDs (around 3000–4300 K) suit the bB’s interior and give even light without harsh glare.
Popular question: What interior bulb sizes fit a 2015 Toyota bB?
Most 2015 bB models use T10 (W5W) wedges for the map and boot lamps, and a 31 mm festoon for the centre dome. Always confirm against the lens markings or the owner’s manual for your exact trim, as some variants use integrated LED modules.
Popular question: Can the 2015 bB’s interior bulbs be upgraded to LED?
Yes. Quality T10/W5W and 31 mm festoon LEDs drop straight in. Pick units that physically fit under the lens, match the original wattage equivalence, and choose a comfortable colour temperature. If an LED doesn’t light, flip it for correct polarity. No load resistors are usually needed for interior circuits.
Popular question: My interior lights don’t work — what should I check?
First, make sure each lamp’s switch isn’t set to OFF and the doors are registering open. Check the DOME 7.5 A fuse in the driver’s side fuse box. Inspect bulb contacts for corrosion, and if you’ve just fitted LEDs, reverse their orientation. If everything checks out, a door jamb switch or the lamp assembly may need attention.
