Suzuki Swift Dome Light Bulb Size

Additional Notes

• The Suzuki Swift dome light specifications cover model years 1989-2001 and reference three distinct bulb sizes: DE3022, DE3021, and 13050.
• The DE3022 is the most frequently specified bulb across the Suzuki Swift dome light fitment data, appearing in seven of the thirteen model years listed.
• The DE3022 is an ANSI-standardized festoon bulb rated at 12V with a 31mm length and end-cap contacts, meaning electrical contact is made through metal caps at each end of the bulb rather than through a base or socket pin.
• The DE3021 shares the same ANSI festoon form factor and 31mm length as the DE3022, also operating at 12V with end-cap contacts, though it carries a different part designation indicating a variation in filament or wattage rating.
• The 13050 is identified as an OEM and Wagner part number for a 12V halogen bulb intended for specialty applications, distinguishing it from the ANSI-coded festoon types used in other Swift model years.
• The 1997 Suzuki Swift is the only model year in the dataset specifying the DE3021, making it a unique fitment within this range.
• The 13050 halogen bulb is specified for the 1989-2001 Suzuki Swift in model years 1990-1991, 1994, 1996, and 1998, and its OEM/Wagner classification suggests it may not share cross-reference compatibility with the ANSI-coded DE3022 or DE3021.
• Because the DE3021 and DE3022 share the same physical festoon format and voltage, they are sometimes treated as interchangeable in aftermarket contexts, though the 1997 Swift specification lists only the DE3021 for that year.
• Festoon bulbs of the 31mm variety are a common format in automotive interior lighting, held in place by spring-loaded clips within the dome light housing rather than by a twist-lock or bayonet socket.
• The alternation between the 13050 halogen type and the DE3022 festoon type across consecutive model years of the Swift indicates that the dome light housing or socket configuration was subject to change during the production run.