Lincoln Continental Headlight Bulb Size

Additional Notes

• The D3S bulb is specified for the Lincoln Continental's high beam and low beam headlights across the 2017-2020 model years when equipped with HID headlamps. It is a mercury-free xenon discharge bulb operating at 42V and 35W, built to ECE standards for use in projector-type housings. Its PK32d-5 base includes an integral ignitor, meaning the ignition component is housed within the bulb itself rather than in a separate external unit.
• The 9007 and 9004 bulbs are dual-filament halogen types, meaning a single bulb serves both high and low beam functions through two separate filaments. The 9007 operates at 65W on high beam and 55W on low beam, while the 9004 operates at 65W and 45W respectively. Both run on 12V and conform to ANSI standards. The 9007 uses a PX29t base and the 9004 uses a P29t base, and these two base types are not interchangeable despite the bulbs sharing a similar dual-filament function.
• The Continental used sealed beam headlight units from 1958 through 1987. Sealed beams are self-contained glass units in which the lens, reflector, and filament form a single assembly. When a sealed beam fails, the entire unit is replaced rather than an individual bulb.
• Three distinct sealed beam formats appear across the 1958-1987 model years. The H5001 is a 4-inch square unit used from 1958-1979, the H5006 is a 5.75-inch round unit covering the same low beam positions in those years, and the H4651, H4652, and H4656 are all 4x6-inch rectangular units used from 1980 onward through 1987. The rectangular formats reflect the industry-wide shift to aerodynamic headlamp styling that occurred in the early 1980s.
• For the 1982-1987 model years, the high beam and low beam positions of the Lincoln Continental used different sealed beam part numbers within the same 4x6-inch rectangular format. The high beam position consistently used the H4651, while the low beam position alternated between the H4652 and H4656 depending on the specific year. These variants are not interchangeable, as each is rated for a specific beam pattern and filament configuration.
• The 9004 and 9007 bulbs, while both dual-filament ANSI halogen types, are not interchangeable. Their base configurations differ, with the 9004 using a P29t base and the 9007 using a PX29t base, and the wattage ratings on the low beam filament also differ. The Continental used the 9004 from 1988-1994 and transitioned to the 9007 from 1995-2002.
• The D3S specification for 2017-2020 models is conditional, applying only to vehicles equipped with HID headlamps. This indicates that not all Continental units from those years necessarily use the D3S, as the fitment is tied to a specific headlamp system rather than the model year alone.
• All bulb types listed across the full specification range operate on 12V electrical systems, which is standard for passenger vehicle applications throughout the periods covered.