Volkswagen Golf Dome Light Bulb Size

Additional Notes

• The Volkswagen Golf dome light specifications reference two distinct bulb types across the model years listed: the 12961 and the 6411.
• The 12961 is a Philips part number designating a miniature wedge bulb in the T10 form factor, using a W2.1x9.5d base and rated at 12V, 5W.
• The 6411 follows the ANSI standard recognized in the US and Canada, taking the form of a festoon bulb with a 36mm length, an SV8.5 base, and an identical 12V, 5W rating.
• Despite sharing the same voltage and wattage, the 12961 and 6411 use fundamentally different base types, a wedge base versus a festoon base, making them physically non-interchangeable without an adapter or socket modification.
• The Volkswagen Golf (1993-2002) uses the 6411 festoon bulb for the dome light position.
• Model years 2015, 2016, and 2020-2021 use the 12961 wedge bulb instead, reflecting a change in socket design from the earlier generation.
• The 2021 Golf specification explicitly notes the 12961 bulb applies to both the front and rear dome light positions, while earlier entries in the same generation do not carry that positional distinction.
• The SV8.5 base on the 6411 is a standard festoon cap type, commonly found in interior lighting applications across many vehicle manufacturers, which means equivalent festoon bulbs of the same 36mm length and base type from other manufacturers are generally considered compatible substitutes.
• The W2.1x9.5d base on the 12961 is the standard wedge base for T10 miniature bulbs, a widely used format in automotive interior and parking light applications.
• Because the two bulb types correspond to different Golf generations with different socket designs, fitment is generation-specific and cross-generation substitution is not supported by these specifications.