Volvo S80 Turn Signal Bulb Size

Additional Notes

• The Volvo S80 turn signal specifications reference six distinct bulb types across its model years: 1157NA, 12496, PY21W, 1034NA, H21W, and P21W. Of these, PY21W and 12496 are the most frequently specified across all three signal positions and the widest range of years.
• PY21W is an ECE-standard single-filament amber bulb rated at 12V and 21W, fitted with a BAU15s bayonet base. Its offset base pins distinguish it physically from other BAY15d and BA15s bulbs, making it non-interchangeable with those types despite sharing the same wattage rating.
• H21W is an ECE-standard single-filament bulb rated at 12V and 21W, using a BAY9s base. The Volvo S80 front turn signal position specifies this bulb for the 2007-2016 model years, representing the longest uninterrupted fitment run of any single bulb type in these specifications.
• The 12496 is a Philips/Osram part number designation for a 12V halogen bulb used in specialty applications. It appears across the front inner, front, and rear turn signal positions for multiple S80 model years, making it one of the most broadly applied bulb references in these specifications.
• The 1157NA and 1034NA are both ANSI-standard dual-filament bulbs with BAY15d bayonet bases and natural amber glass, each rated at 12V with a 21W/5W filament configuration. The 1034NA is noted as a variant of the 1157, and both types are specified only for the front inner turn signal position on earlier S80 model years.
• P21W is an ECE-standard single-filament bulb rated at 12V and 21W, using a BA15s bayonet base. It is specified solely for the Volvo S80 rear turn signal in 2005 and 2006, and its straight-pin BA15s base sets it apart from the offset-pin BAU15s base of the PY21W.
• Several S80 front and front inner turn signal fitments carry chassis number qualifiers. Bulb sizes for those positions in model years 1999-2006 are split at chassis number 335000, with PY21W specified from chassis 335000 onward and differing bulb types specified to chassis 334999.
• The chassis-based split in the 2004-2006 front inner turn signal position means that two vehicles sharing the same model year may require different bulb types depending on their individual chassis number, making chassis verification necessary for correct fitment in those years.
• The front turn signal position for the 2005 S80 specifies the 12496, while the same position for 2006 specifies PY21W. These two bulb types use different base configurations, confirming they are not interchangeable with each other.
• The rear turn signal position shows alternating bulb specifications across several model years, with PY21W and 12496 each appearing in non-consecutive years between 2007 and 2016. Because these bulbs use different base types, year-specific verification is required for that position.