Toyota Supra Parking Light Bulb Size

Additional Notes

• The Toyota Supra parking light specifications cover model years 1986-1998 and reference three distinct bulb sizes: 194, 168, and 12961. All three are T10 miniature wedge bulbs operating on a 12-volt system, making them physically similar in form despite their differences in wattage and designation origin.
• The 194 bulb is an ANSI-standardized type used in the United States and Canada. It draws 3.78 watts and was the specified parking light bulb for the Toyota Supra across the 1986-1993 model years, representing the longest continuous application within these specifications.
• The 168 bulb is also an ANSI-standardized type for the US and Canadian market. It operates at 4.9 watts, slightly higher than the 194, and was specified for the 1994-1996 model years. The wattage difference between the 194 and 168 means the two are not electrically identical despite sharing the same T10 wedge form factor.
• The 12961 is a Philips-branded part number rather than an ANSI industry designation. It uses a W2.1x9.5d base, which is the standard wedge base specification for T10 bulbs, and is rated at 5 watts on a 12-volt system. It was specified for the 1997-1998 Toyota Supra.
• Because the 194, 168, and 12961 are all T10 wedge bulbs, they share a physically compatible base type. However, their wattage ratings differ across 3.78W, 4.9W, and 5W respectively, which is a relevant consideration when evaluating substitution between them.
• The shift from the ANSI-designated 168 to the Philips-numbered 12961 between the 1996 and 1997 model years reflects a change in how the bulb is catalogued rather than a fundamental change in bulb format, as both are T10 wedge types on a 12-volt circuit.