Audi Q3 Map Light Bulb Size

The Audi Q3 map light requires a bulb with the specific size 12961 for proper installation and function within the interior lighting housing. The provided data covers the range from 2015 through 2018 for the specified component.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
2015-2018	12961

Bulb Specifications

Description	Bulb Size
Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W.	12961

Other Locations

Additional Notes

The Audi Q3 uses the 12961 bulb for the map light across the 2015-2018 model years.
The 12961 is a Philips part number designating a miniature wedge bulb in the T10 form factor.
T10 refers to a tubular bulb with a width of 10/8 of an inch, commonly used in low-intensity interior lighting applications such as map lights, dome lights, and instrument panel illumination.
The bulb operates on a 12-volt electrical system and draws 5 watts, which is consistent with standard automotive interior lighting.
The W2.1x9.5d base type is a wedge-style base where the glass envelope itself acts as the retention mechanism, requiring no separate metal shell or bayonet pins.
The W2.1x9.5d designation specifies a contact width of 2.1mm and a base length of 9.5mm, which determines physical fitment into the socket.
Because the T10 wedge base is a widely standardized format, aftermarket bulbs sharing the W2.1x9.5d base specification are generally interchangeable with the 12961 in the Audi Q3 (2015-2018), provided voltage and wattage ratings are matched.
Substituting a bulb with a higher wattage rating than 5W in this application risks exceeding the thermal tolerance of the surrounding plastic housing and socket.