Honda Ridgeline Parking Light Bulb Size

Additional Notes

• The Honda Ridgeline parking light specifications cover model years 2006-2014 and 2017-2020, representing two distinct generations of the vehicle.
• Three bulb sizes appear across these specifications: the 7444NA, 7443NA, and 3457NA, all of which are ANSI-standardized dual-filament wedge bulbs rated for 12-volt systems.
• The 3457NA is a T25 wedge bulb rated at 27W/7W and was the specified size for the Honda Ridgeline from 2006-2014.
• The second-generation Ridgeline (2017-2018) uses the 7443NA, a T20 wedge bulb rated at 21W/5W, which is physically smaller and draws less wattage than the 3457NA used in earlier model years.
• The 7444NA shares the same T20 form factor, voltage, and wattage rating as the 7443NA, though the two are distinct ANSI part numbers and are not listed as interchangeable within these specifications.
• The 2020 Ridgeline specifies the 7444NA exclusively for vehicles equipped with halogen capsule headlamps, indicating that headlamp type is a determining factor in parking light bulb fitment for that model year.
• The "NA" suffix on all three bulb types denotes natural amber glass, meaning the amber color is produced by the glass envelope itself rather than by a painted or coated lens.
• The dual-filament design of all three bulb types means each serves two lighting functions within a single housing, with the higher wattage filament and lower wattage filament handling separate roles.
• The shift from T25 to T20 wedge bases between the 2014 and 2017 Ridgeline means bulbs from the earlier generation are not physically compatible with the later generation's sockets.