Volvo V40 front and rear turn signal bulb sizes include 3457NA and 3357NA for inner positions, 12961 for outer applications, and PY21W for rear locations. The replacement chart covers 2000 to 2004 model years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Volvo V40 turn signal specifications reference four distinct bulb types across its front and rear positions: 3457NA, 3357NA, 12961, and PY21W.
The 3457NA is a dual-filament wedge bulb in the T25 form factor, rated at 12V with a 27W main filament and a 7W secondary filament, and it carries natural amber glass rather than a clear envelope. It follows the ANSI standard applicable in the US and Canada.
The 3357NA shares the same T25 wedge form factor and natural amber glass as the 3457NA but carries only a single filament rated at 27W. The absence of a second filament means the two types are not interchangeable despite their physical similarity.
The 12961 is a Philips part number designating a miniature T10 wedge bulb with a W2.1x9.5d base, rated at 12V and 5W. Its low wattage places it well below the other turn signal bulbs in the V40 specifications.
The PY21W follows the ECE standard used in Europe and worldwide. It is a single-filament amber bulb rated at 12V and 21W, fitted with a BAU15s offset bayonet base. The offset pin arrangement of the BAU15s base prevents substitution with standard BA15s bayonet bulbs.
The Volvo V40 rear turn signal position uses the PY21W across all model years from 2000-2004, making it the only rear-specific bulb type in these specifications.
The front inner turn signal position on the V40 alternates between the 3457NA and the 3357NA depending on model year. The 2000 and 2003 model years call for the 3357NA, while the 2001, 2002, and 2004 model years call for the 3457NA.
The front outer turn signal position on the V40 uses the 12961 for the 2000-2003 model years. No front outer turn signal entry is present for the 2004 model year.
The front turn signal position lists the 3357NA with an "Inner" designation for all model years from 2000-2004, indicating this entry refers specifically to the inner portion of the front assembly rather than the full front position.
The 3457NA and 3357NA bulbs both conform to ANSI standards, while the PY21W conforms to ECE standards. These two regulatory frameworks are not mutually compatible, and bulbs certified under one standard are not rated as direct replacements for those under the other.