Polaris 340 Brake Bulb Size

Additional Notes

• The 921 bulb is the sole brake bulb size specified for the Polaris 340 across all listed model years (1999-2008), with the exception of 2007, which does not appear in the dataset.
• The 921 is an ANSI-standardized bulb type, meaning its electrical and physical characteristics conform to a recognized North American specification used across the United States and Canada.
• The 921 uses a wedge-style base, classified under the T15 form factor. A wedge base has no metal pins or bayonet lugs; instead, the glass envelope itself is pinched at the bottom and pressed directly into the socket.
• The bulb operates at 12 volts and draws 16 watts, which is consistent with standard low-power automotive brake and tail light applications running on a vehicle's 12V electrical system.
• The T15 designation refers to the bulb's tubular envelope width, expressed in eighths of an inch, placing the envelope at approximately 15/8 of an inch across.
• Because the 921 is an ANSI-standardized wedge type, it is electrically and physically interchangeable with other bulbs sharing the same base and ratings, though substitutions should be confirmed against the original 12V, 16W specification to avoid electrical mismatches.