The BMW 760Li front inner turn signal uses 3457NA or 3357NA bulb sizes, while front turn signals require 3357NA or 12961 sizes, and rear turn signals use 12496 or PY21W sizes. A replacement chart covering 2003 to 2008 model years contains vehicle production years and bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The BMW 760Li uses five distinct bulb types across its turn signal positions for the 2003-2008 model years: the 3457NA, 3357NA, 12961, 12496, and PY21W.
The 3457NA and 3357NA are both T25 wedge bulbs rated at 12V and share the same natural amber glass construction, though they differ in filament count. The 3457NA is a dual-filament bulb rated at 27W/7W, while the 3357NA is a single-filament bulb rated at 27W.
Because the 3457NA and 3357NA differ in filament count, they are not directly interchangeable despite sharing the same T25 form factor and amber glass. Installing one in place of the other may result in incorrect function for the intended circuit.
The front inner turn signal position on the BMW 760Li alternates between the 3457NA and 3357NA depending on the model year. The 3357NA applies to the 2003 and 2007 model years, while the 3457NA applies to 2004-2006 and 2008.
The front turn signal position uses two separate bulbs per side across all 2003-2008 model years: a 3357NA for the front-facing position and a 12961 for the side position.
The 12961 is a Philips-designated miniature T10 wedge bulb with a W2.1x9.5d base, rated at 12V and 5W. Its low wattage reflects its role as a side marker rather than a primary signal source.
The rear turn signal position on the BMW 760Li uses the PY21W for the 2006-2007 model years. The PY21W follows the ECE standard and uses a BAU15s bayonet base, which is an offset-pin base that prevents accidental installation of non-amber bulbs in the same socket.
The rear turn signal for the 2003-2005 and 2008 model years uses the 12496, a Philips/Osram halogen bulb rated at 12V. The 12496 and PY21W are not interchangeable due to their different base types, making year-specific fitment a relevant consideration for rear replacements.
The 3457NA and 3357NA both follow the ANSI standard applicable in the United States and Canada, while the PY21W follows the ECE standard used in Europe and other international markets. Their presence within the same model line across different years reflects regional specification differences built into the vehicle.
The front turn signal assembly on the BMW 760Li is the only position that requires two different bulb types simultaneously, combining the 3357NA and 12961 within a single assembly across all six model years covered in the specifications.