The Volvo C30 front turn signal uses bulb size 12274NA or 12496, while the rear turn signal requires PY21W or 12496 bulb sizes. The replacement chart covers 2008 through 2013 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 C30 front turn signal uses two distinct bulb types across its production run, with the 12496 fitted to 2008-2009 models and the 12274NA fitted to 2010-2013 models.
The 12274NA is an OEM part number designating a natural amber glass bulb operating at 12V. The amber tint is built into the glass itself rather than achieved through a colored lens or coating.
The 12496 is a 12V halogen bulb catalogued under Philips and Osram part numbering systems and is rated for specialty automotive applications.
The Volvo C30 rear turn signal uses the 12496 for 2008-2010 models, while 2011-2013 models use the PY21W, indicating a specification change at the 2011 model year for that position.
The PY21W is defined under ECE regulations and is widely used across European and international vehicle markets. It operates at 12V with a 21W output and uses a BAU15s bayonet base.
The BAU15s base of the PY21W is an offset single-contact bayonet fitting. The offset pin placement prevents accidental installation of non-amber bulbs in sockets designated for amber signaling.
The front and rear turn signal positions on the C30 share the 12496 bulb only during the 2008-2009 model years, making those the sole years where a single bulb type covers both positions.
The 12274NA and PY21W are not interchangeable. They differ in base type, wattage rating, and part number origin, meaning a rear 2011-2013 socket designed for PY21W will not accept the 12274NA used at the front.