The Audi Q5 side marker requires a specific bulb size identified as 12961 for proper installation and function. Data for the specified component covers the range from 2017 through 2024.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 12961 is a Philips part number designating a miniature wedge bulb in the T10 form factor, fitted with a W2.1x9.5d base and rated at 12 volts and 5 watts.
The T10 wedge base design relies on the bulb's own leads to make electrical contact within the socket, requiring no separate locking mechanism for retention.
The Audi Q5 front side marker position uses the 12961 bulb across the 2009-2014 model years, exclusively under the condition that the vehicle is equipped with halogen capsule headlamps.
The halogen capsule headlamp qualifier on the front side marker fitment indicates that Q5 units fitted with alternative headlamp systems may use a different front side marker configuration.
The rear side marker position on the Audi Q5 also uses the 12961 bulb for the 2019-2020 model years, with no headlamp-type condition attached to that fitment.
The shared 12961 specification across both the front and rear side marker positions does not automatically confirm interchangeability, as socket orientation and housing geometry can differ between positions.
At 5 watts, the 12961 operates at a low power draw consistent with marker and parking light applications, where sustained low-intensity illumination is the functional requirement.
The W2.1x9.5d base designation is standardized under international automotive lamp nomenclature, where W2.1x9.5d describes the wedge contact width and pin spacing of the base.