The Jeep Grand Cherokee side marker utilizes a 12961 bulb size for the lighting components located on the exterior of the vehicle. Data for the specific bulb requirements covers the range from 2019 to 2021.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 12961 is a Philips part number for a T10 miniature wedge bulb with a W2.1x9.5d base, rated at 12V and 5W. It serves as the front side marker bulb on the Jeep Grand Cherokee for the 2014-2021 model years, with the 2014-2020 entries carrying a "With Halogen Capsule Headlamps" fitment condition.
The W2.1x9.5d base designation on the 12961 bulb refers to a wedge-type base with a 9.5mm pin spacing and a 2.1mm wire contact width, which is the standard physical interface for T10 wedge bulbs in this size class.
The 194 is an ANSI-standardized T10 miniature wedge bulb rated at 12V and 3.78W. It is used as the front side marker on the Grand Cherokee for 1999 and 2005-2010, and as the rear side marker for 1993-1998.
The 194NA shares the same ANSI T10 wedge form and 12V, 3.78W rating as the standard 194, but its glass envelope is tinted natural amber. It is specified as the front side marker for the Grand Cherokee from 1993-1998 and in 2003-2004.
The natural amber tint of the 194NA produces a colored output without a separate lens filter. This makes it a direct fitment requirement in positions where the housing lens is clear rather than amber-tinted.
Because the 194 and 194NA share the same base, voltage, and wattage, their physical sockets are interchangeable. However, substituting a clear 194 in a position specified for the 194NA would alter the emitted light color, which may affect regulatory compliance.
The 3157 is an ANSI-standardized T25 dual-filament wedge bulb rated at 12V with a 27W high filament and a 7W low filament. It is specified as the rear side marker on the Grand Cherokee for 2007-2011.
The T25 body of the 3157 is physically larger than the T10 body used by the 194, 194NA, and 12961. These two bulb families use different socket sizes and are not interchangeable with one another.
The front side marker position on the Grand Cherokee transitions from the T10 194-series bulbs used through 2010 to the T10 12961 in 2011 and again in 2014-2021. Although both are T10 wedge bulbs, the 12961 operates at 5W versus the 3.78W of the 194-series, representing a higher wattage draw in the same socket format.
The 2014-2020 front side marker entries for the Grand Cherokee carry the condition "With Halogen Capsule Headlamps," indicating that the 12961 fitment is specific to that headlamp configuration and that other headlamp variants on those model years may use a different front side marker bulb.