INFINITI QX56 Map Light Bulb Size

Additional Notes

• The INFINITI QX56 map light specifications cover model years 2004 through 2013, with two distinct bulb types used across that span.
• The DE3175 is the more widely used of the two bulb types, appearing across seven model years of the QX56 (2004-2010), while the 12961 covers three model years (2011-2013).
• The DE3175 is a festoon-style bulb, meaning it seats by pressing its two end-cap contacts against spring clips inside the housing rather than using a socket or base pin arrangement.
• The festoon format of the DE3175 requires a 31mm housing length, which is a fixed physical constraint of the lamp cavity in those model years.
• The DE3175 carries an ANSI designation, indicating it conforms to a standardized specification recognized across the United States and Canada, allowing for cross-brand substitution within that standard.
• The 12961 is a Philips part number for a T10 miniature wedge bulb, which uses a W2.1x9.5d wedge base that seats by friction fit into a corresponding socket rather than by end-cap contact.
• The 12961 operates at 12V and 5W, placing it in the low-wattage range typical of interior courtesy and map lighting applications.
• The two bulb types are not interchangeable with each other, as the festoon and wedge formats use fundamentally different mounting and contact systems.
• For the 2004 INFINITI QX56, the DE3175 fitment is noted as applicable from January 2004, indicating a mid-production-year introduction for that model.