INFINITI I35 Map Light Bulb Size

The INFINITI I35 map light utilizes bulb sizes DE3175 and 89 for interior illumination. Data for the specified components covers the range from 2002 through 2004.

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
2004	DE3175 (Front, From 08/2003)
2003	DE3175 (Front, For Vehicle With Sunroof)
2003	89 (Front, For Vehicle Without Sunroof, To 08/2003)
2002	DE3175 (For Vehicle With Sunroof)
2002	89 (Front, For Vehicle Without Sunroof)

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 DE3175 is a festoon-type bulb measuring 31mm in length with end-cap contacts, operating at 12V. Festoon bulbs seat by pressing lengthwise into spring-loaded holders rather than twisting or pushing into a socket.
The 89 bulb uses a BA15s single-contact bayonet base, operates at 12V, and draws 13W. It is a lower-wattage variant of the 1156 bulb family and shares the same base type, though the two are not interchangeable due to differing wattage and application ratings.
Both the DE3175 and 89 conform to ANSI standards applicable in the United States and Canada, meaning their physical and electrical specifications are standardized across manufacturers within those markets.
The INFINITI I35 uses two distinct map light bulb types depending on trim configuration. Vehicles equipped with a sunroof use the DE3175 festoon bulb, while vehicles without a sunroof use the 89 bayonet-base bulb across the 2002 and 2003 model years.
For the 2003 model year, the production date of the vehicle determines which bulb applies to front map lights. Units produced through 08/2003 without a sunroof take the 89 bulb, while the DE3175 applies to sunroof-equipped vehicles regardless of production date within that year.
The 2004 model year specifies only the DE3175 for front map lights, with that fitment applying to vehicles produced from 08/2003 onward. No sunroof-conditional split is listed for 2004.
Because the DE3175 and 89 use fundamentally different mounting systems, a festoon holder and a bayonet socket are physically incompatible. Substituting one bulb type for the other is not possible without modifying the housing.