Porsche 911 Dome Light Bulb Size

Additional Notes

• The Porsche 911 uses the 211-2 bulb size across all dome light positions for model years 1965-2013, making it the sole bulb type present in these specifications.
• The 211-2 is a festoon-style bulb, meaning it is cylindrical in shape and mounts by pressing its end caps into spring-loaded clips rather than using a twist or plug-in socket.
• The 211-2 operates at 12 volts and draws 12 watts, which is consistent with standard automotive electrical systems.
• The bulb carries an SV8.5 base designation, referring to the 8.5mm cap size at each end of the festoon body, a measurement that determines socket compatibility.
• The 211-2 is rated at 41mm in length, and festoon bulbs are particularly sensitive to length fitment, as a bulb of a different length will not seat correctly in the retaining clips even if the voltage and wattage ratings match.
• The 211-2 is an ANSI-standardized bulb recognized in both the United States and Canada, meaning units sourced from either market share the same specification.
• For the 2013 model year, the Porsche 911 dome light circuit is divided into three positions: left, right, and center, each specifying the 211-2 bulb independently.
• Model years 1965-2012 each list a single dome light bulb position without a positional designation, in contrast to the three-position layout noted for 2013.