Honda Prelude Trunk Bulb Size

The Honda Prelude trunk light utilizes bulb sizes 168, DE3021, 6428, and 13050 depending on the specific version of the vehicle. Provided information covers a span of time starting from 1979 through 2001.

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
1997-2001	168
1996	DE3021
1994-1995	6428
1993	DE3021
1992	6428
1990-1991	13050
1989	6428
1988	13050
1987	DE3021
1983-1986	6428
1979-1982	168

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W.	168
ANSI standard (US & Canada). Festoon bulb, 31mm length, end-cap contacts. 12V.	DE3021
ANSI standard (US & Canada). Festoon bulb, 36mm length, SV8.5 base. 12V, 5W.	6428
OEM/Wagner part number. Halogen bulb, specialty application. 12V.	13050

Other Locations

Additional Notes

The Honda Prelude trunk bulb specifications span model years 1979 through 2001, with four distinct bulb types used across that range: the 168, DE3021, 6428, and 13050.
The 6428 is the most frequently specified trunk bulb across the Honda Prelude lineup, appearing in model years 1983-1986, 1989, 1992, 1994-1995, with additional isolated years. It is a festoon-type bulb with a 36mm length, SV8.5 base, rated at 12V and 5W.
The 168 bulb is the second most common type in these specifications, used in the 1979-1982 and 1997-2001 model years. It is a miniature wedge bulb in the T10 form factor, rated at 12V and 4.9W.
The DE3021 is a festoon bulb with a 31mm length and end-cap contacts, rated at 12V. It appears in the 1987, 1993, and 1996 model years of the Prelude.
The 6428 and DE3021 are both festoon-style bulbs, but they are not interchangeable. The 6428 measures 36mm in length with an SV8.5 base, while the DE3021 measures 31mm with end-cap contacts, representing a different mounting and sizing standard.
The 13050 is identified by an OEM/Wagner part number rather than an ANSI standard designation, distinguishing it from the other three bulb types in these specifications. It is a halogen bulb for specialty application, rated at 12V, and was used in the 1988, 1990, and 1991 model years.
The 168 wedge bulb uses a T10 form factor, which refers to a tubular bulb body roughly 10/8 of an inch wide. This base type is not physically compatible with the festoon or halogen bulb sockets used in other Prelude model years.
All four bulb types in these specifications are ANSI-standard or OEM-designated parts operating at 12V, consistent with standard automotive electrical systems.
The 1996 model year uses the DE3021, while the immediately adjacent 1995 and 1997 model years use the 6428 and 168 respectively, indicating that trunk bulb fitment changed across consecutive model years and cross-year substitution is not supported by these specifications.
The wattage of the 168 (4.9W) and the 6428 (5W) are closely matched, but their differing base types mean wattage alone does not determine interchangeability between these two bulbs.