Toyota Avalon Map Light Bulb Size

Toyota Avalon map light bulbs utilize 3 distinct sizes: 12961, 168, and DE3423, with the bulb specifications varying across model generations. The replacement chart documents vehicle production years spanning 1995 to 2022.

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
2013-2022	12961
2005-2012	168
2003-2004	DE3423
2000-2002	DE3175
1999	57
1998	DE3175
1995-1997	DE3175 (With Moon Roof)
1995-1997	57 (Without Moon Roof)

Bulb Specifications

Description	Bulb Size
Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W.	12961
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W.	168
ANSI standard (US & Canada). Festoon bulb, 41mm length, end-cap contacts. 12V.	DE3423
ANSI standard (US & Canada). Festoon bulb, 31mm length, end-cap contacts. 12V.	DE3175
ANSI standard (US & Canada). Single-filament bulb with BA9s base. 12V, 1W.	57

Other Locations

Additional Notes

The 12961 is a Philips part number for a T10 miniature wedge bulb with a W2.1x9.5d base, rated at 12V and 5W. The Toyota Avalon uses this bulb for the map light across the 2013-2022 model years.
The 168 is an ANSI-standard T10 miniature wedge bulb rated at 12V and 4.9W. Both the 12961 and 168 share the T10 wedge form factor, though the 168 draws marginally less wattage than the 12961.
The Avalon used the 168 bulb for the map light from 2005-2012. Because the 168 and 12961 are both T10 wedge types, their physical base is compatible, though wattage differs slightly between them.
The DE3175 is an ANSI-standard festoon bulb with a 31mm length and end-cap contacts, rated at 12V. Festoon bulbs seat between two spring-loaded contacts rather than inserting into a wedge socket, making them physically incompatible with T10 wedge sockets.
The DE3423 is an ANSI-standard festoon bulb with a 41mm length, also using end-cap contacts at 12V. The DE3423 is longer than the DE3175, and the two are not interchangeable despite sharing the same festoon contact style.
The Avalon used the DE3423 for the map light in 2003-2004, while the DE3175 was used in 1998-2002 and in 2000. The difference in festoon length between these two years represents a direct fitment incompatibility.
The 57 is an ANSI-standard single-filament bulb with a BA9s bayonet base, rated at 12V and 1W. The BA9s base is a distinct socket type, incompatible with both wedge and festoon sockets used in other Avalon model years.
For the 1995-1997 Toyota Avalon, map light bulb fitment depends on whether the vehicle is equipped with a moon roof. Units without a moon roof use the 57 bulb, while units with a moon roof use the DE3175.
The 1999 Avalon uses the 57 bulb regardless of moon roof configuration, which differs from the pattern seen in the 1995-1997 model years where the moon roof option determined bulb type.
Across the full model range covered by these specifications, four distinct bulb base types are represented: the T10 wedge, the festoon end-cap, and the BA9s bayonet. Substituting across these base types is not physically possible without socket modification.