INFINITI Q70 Map Light Bulb Size

The INFINITI Q70 map light utilizes bulb sizes 89 and 12961 and DE3175 for illumination purposes. Available data for the specified components covers the range from 2014 to 2019.

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
2019	89 (Center)
2019	12961 (Side)
2018	89 (Front)
2018	12961 (Side)
2017	89 (Front)
2017	12961 (Rear left and right)
2016	89
2016	12961 (Driver side and Passenger side)
2014-2015	89 (Center)
	12961 (Driver side and Passenger side)
	DE3175 (Front)

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Lower wattage variant of 1156. 12V, 13W.	89
Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W.	12961
ANSI standard (US & Canada). Festoon bulb, 31mm length, end-cap contacts. 12V.	DE3175

Other Locations

Additional Notes

The INFINITI Q70 map light specifications reference three bulb types across the 2014-2019 model years: the 89, the 12961, and the DE3175.
The 89 bulb is an ANSI-standardized type used in both the US and Canada. It operates at 12V and 13W, uses a BA15s bayonet base, and is a single-filament design. It is a lower-wattage variant of the more common 1156 bulb.
The 12961 is a Philips part number designating a T10 miniature wedge bulb with a W2.1x9.5d base. It operates at 12V and 5W, making it notably lower in wattage than the 89.
The DE3175 is an ANSI-standardized festoon bulb with a 31mm length and end-cap contacts operating at 12V. Its contact style differs fundamentally from both the bayonet base of the 89 and the wedge base of the 12961, making the three types non-interchangeable.
The 89 and 12961 appear together across all six model years in the specifications, while the DE3175 is present only in the 2014 and 2015 model years.
In the 2015 INFINITI Q70, three distinct map light bulb types are used simultaneously: the DE3175 for the front position, the 89 for the center, and the 12961 for the driver side and passenger side positions.
The 2019 model year uses the term "Center" for the 89 bulb position, while 2017 and 2018 use the term "Front" for the same bulb type, and 2014-2016 also use "Center" or no positional label, reflecting variation in position naming across years.
The BA15s bayonet base of the 89 bulb requires a twist-and-lock installation, whereas the W2.1x9.5d wedge base of the 12961 is a friction-fit type. These base differences mean the two bulbs cannot be substituted for one another regardless of voltage compatibility.
The DE3175 festoon bulb seats by pressing its end caps into spring clips within the housing, a retention method that is physically incompatible with sockets designed for either the 89 or the 12961.
Across the 2016-2019 model years, the side or secondary map light positions consistently use the 12961, while the primary or center position consistently uses the 89, indicating a stable positional assignment for these two types within that period.