The Mitsubishi i-MiEV uses a 12961 bulb size for both front and rear side marker applications. The replacement chart covers 2012 through 2017 model years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Mitsubishi i-MiEV uses the 12961 bulb for both its front and rear side markers across the 2012-2017 model years covered in these specifications.
The 12961 is a Philips part number designating a miniature wedge bulb in the T10 form factor, operating at 12 volts and rated at 5 watts.
T10 refers to a tubular bulb body that is 10/8 of an inch wide, a common sizing convention in miniature automotive lighting.
The W2.1x9.5d base type is a wedge-style connector, meaning the bulb is held in place by tension from the socket rather than by a bayonet or screw mechanism.
The W2.1x9.5d designation specifies a base width of 2.1mm and a pin spread of 9.5mm, which determines physical socket compatibility.
Because the same 12961 bulb is specified for both front and rear side marker positions, a single bulb type serves all four side marker locations on the i-MiEV.
The 5-watt rating places the 12961 in the low-wattage category typical of side marker applications, where illumination intensity requirements are lower than those of headlamps or brake lights.
Substituting a bulb with a different base type, such as a bayonet or festoon base, would be physically incompatible with the W2.1x9.5d wedge socket used in these positions.