INFINITI M45 Map Light Bulb Size

The INFINITI M45 map light utilizes DE3175 and 89 bulb sizes for illumination within the interior cabin area of the vehicle. Data for the specified components covers the range from 2003 to 2010.

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
2006-2010	DE3175 (Driver side and Passenger side)
2006-2010	89 (Front)
2003-2004	DE3175 (Center)
2003-2004	89 (Front)

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Festoon bulb, 31mm length, end-cap contacts. 12V.	DE3175
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Lower wattage variant of 1156. 12V, 13W.	89

Other Locations

Additional Notes

The INFINITI M45 map light system uses two distinct bulb types across its model years: the DE3175 festoon bulb and the 89 single-filament bulb, both operating at 12 volts and conforming to ANSI standards for the US and Canadian markets.
The DE3175 is a festoon-style bulb measuring 31mm in length with end-cap contacts, meaning it seats by pressing into spring-loaded clips at both ends rather than twisting or inserting into a socket base.
The 89 bulb uses a BA15s bayonet base, a single-pin mount that locks into place with a quarter-turn, and is rated at 13 watts.
The 89 bulb is a lower-wattage variant of the 1156 bulb. While the two share the same BA15s bayonet base, they are not interchangeable due to the wattage difference, and substituting a 1156 in a position specified for an 89 risks exceeding the circuit's designed load.
For the 2006-2010 INFINITI M45, the map light system uses the DE3175 in both the driver side and passenger side positions, while the 89 bulb occupies the front position.
The 2003-2004 M45 differs from later model years in that the DE3175 is designated for a center position rather than separate driver and passenger side positions, indicating a different interior map light housing configuration.
The front position across all model years from 2003-2010 consistently calls for the 89 bulb, making it the only position that remains unchanged across the full span of the specifications.
Because the DE3175 uses end-cap contacts and the 89 uses a bayonet base, the two bulb types are physically incompatible with each other's sockets, and position-specific fitment must be observed.