Toyota Corolla Side Marker Bulb Size

Additional Notes

• The 194 bulb is the most frequently specified size across the Toyota Corolla's front and rear side marker positions, appearing across both locations in model years spanning from 1978 through 2002. It is a T10 miniature wedge bulb rated at 12V and 3.78W, conforming to ANSI standards for the US and Canadian markets.
• The 168 bulb shares the same T10 miniature wedge form factor as the 194 but operates at a slightly higher wattage of 4.9W versus 3.78W. Both bulbs occupy the same physical socket type, though the wattage difference means they are not electrically identical replacements for one another.
• The 3157NA and 4157NA bulbs used in the Toyota Corolla front side marker positions for 2002-2008 are dual-filament T25 wedge bulbs with natural amber glass. The amber coloring is built into the glass envelope itself rather than applied as a coating, which affects the color output at the lens level. Both share identical voltage and wattage ratings of 12V, 27W/7W.
• The 3157 and 3157NA share the same T25 wedge base and 12V, 27W/7W electrical ratings, with the only distinction being the natural amber glass of the NA variant. This means the two types are physically interchangeable at the socket, but substituting a clear 3157 for a 3157NA will alter the emitted light color unless the housing lens provides its own amber filtering.
• The 2000 model year front side marker position carries two separate bulb specifications divided by a production date of July 2000. Units produced before that date use the 3157, while those produced from July 2000 onward use the 9005, a single-filament halogen bulb with a P20d base rated at 12V and 65W. These two bulbs are not interchangeable due to differing base types and wattage.
• The 7443 rear side marker bulb, specified for the Corolla across 2009-2015, is a dual-filament T20 wedge bulb rated at 12V, 21W/5W. The 1157 used in rear side marker positions for 1993-1997 carries the same 21W/5W power rating but uses a BAY15d bayonet base rather than a wedge base, making the two physically incompatible despite their matching wattage figures.
• The 67, 89, and 97 bulbs specified for earlier Corolla model years all use a BA15s single-contact bayonet base. The 67 is rated at 8W, the 89 at 13W, and the 97 also at 13W. While the 89 and 97 share the same wattage, they are distinct part numbers and are not confirmed as interchangeable within these specifications.
• The rear side marker position for the 2024 Toyota Corolla specifies the 168 bulb, while the front side marker position for that same year is not listed in the specifications. The rear position for 2023 and 2020 also calls for the 168, whereas the front positions for those years share the same 168 designation, making the front and rear specifications consistent for those model years.