INFINITI QX50 Interior Door Bulb Size

The INFINITI QX50 interior door light utilizes 168 and 194 bulb sizes for the internal lighting components. Data for the specified vehicle covers the period from 2014 through 2020.

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
2020	168
2019	194
2014-2017	168

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W.	168
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W.	194

Other Locations

Additional Notes

The INFINITI QX50 interior door bulb specifications reference two ANSI-standard miniature wedge bulbs: the 168 and the 194. Both are T10 wedge-base bulbs rated at 12 volts, recognized under US and Canadian standards.
The 168 bulb draws 4.9 watts, while the 194 draws 3.78 watts. Although both share the same T10 wedge base, their wattage ratings differ, which is a relevant factor in fitment decisions.
The 168 bulb is specified for the 2014-2017 and 2020 QX50 interior door positions.
The 2019 QX50 uses the 194 bulb for the interior door position, which differs from most other model years in these specifications.
Because the 168 and 194 share a T10 wedge base, they are physically interchangeable in terms of socket fit. However, the wattage difference means a direct substitution would alter the electrical load at that circuit position.
The T10 wedge base is a common miniature bulb format in automotive interior applications, relying on the wedge-shaped glass envelope itself to make contact with the socket rather than a separate metal base.