The Oldsmobile Intrigue front turn signal requires 4157NA or 5702AK bulb sizes, while the rear turn signal uses a 3057 bulb size. The replacement chart covers 1998 through 2002 production years with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Oldsmobile Intrigue front turn signal uses the 4157NA bulb for model years 1999-2002. This is an ANSI-standardized dual-filament wedge bulb in the T25 form factor, rated at 12V with a 27W high filament and 7W low filament, and features natural amber glass to produce the required amber signal color.
The 1998 Oldsmobile Intrigue front turn signal takes the 5702AK bulb rather than the 4157NA used in later model years. The 5702AK is a Sylvania-specific part number for an amber-coated variant of the ANSI 3157 bulb, sharing the same T25 form factor and 12V, 27W/7W electrical ratings.
Although the 4157NA and 5702AK share the same T25 wedge base, voltage, and wattage ratings, they are not identical. The 4157NA achieves its amber output through natural amber glass, while the 5702AK uses an amber coating applied over a clear or standard envelope. Substituting one for the other across the 1998 and 1999-2002 model years warrants attention to this distinction.
The rear turn signal across all Oldsmobile Intrigue model years covered in the specifications, 1998-2002, uses the 3057 bulb. This is an ANSI-standard dual-filament T25 wedge bulb rated at 12V, 27W/7W, with no amber coloring in the glass or coating.
All three bulb types listed in these specifications, the 4157NA, 5702AK, and 3057, share the T25 wedge base and the same 12V, 27W/7W electrical ratings. This physical and electrical commonality reflects the T25 platform's widespread use across dual-filament automotive signal applications in North American vehicles of this era.
The dual-filament design present in all three bulbs serves two functions within a single housing. The higher 27W filament operates for the active turn signal flash, while the lower 7W filament supports a secondary function such as parking or running light operation.