The Jeep Grand Cherokee brake light utilizes 3157, 2458, 3057, and 2057 bulb sizes depending on the specific vehicle configuration. Available data covers the time range from 1993 through 2021.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Jeep Grand Cherokee uses the 3157 bulb as its brake bulb across the widest span of model years in these specifications, covering 1999-2021 with the exception of 2012 and 2013. The 3157 is a dual-filament T25 wedge bulb rated at 12V with a 27W high filament and 7W low filament, conforming to ANSI standards for the US and Canada.
The 3057 is also a dual-filament T25 wedge bulb rated at 12V, 27W/7W, sharing the same wattage and base type as the 3157. The Grand Cherokee used the 3057 for the 1997-1998 model years in the standard brake position.
Although the 3157 and 3057 share identical wattage ratings and the same T25 wedge base, they are not fully interchangeable in all applications. The two bulbs differ in their internal filament positioning, which can affect compatibility with certain socket designs.
The 1993-1996 Grand Cherokee used the 2057 bulb for the standard brake position. The 2057 is a dual-filament bulb with a BAY15d bayonet base, rated at 12V, 26.9W/8W, and is described as a brighter variant of the 1157.
The BAY15d bayonet base of the 2057 is physically distinct from the wedge base of the 3157 and 3057, meaning bulbs from the 1993-1996 model years are not socket-compatible with those from 1997 onward without modification.
For the Center High Mount Stop Light, the Grand Cherokee used the 921 bulb across most of the listed years, including 1993-1996, 1999, and 2003-2004. The 921 is a single-filament T15 wedge bulb rated at 12V, 16W.
The 922 bulb was used in the Center High Mount Stop Light for the 1997-1998 Grand Cherokee. Like the 921, it is a single-filament T15 wedge bulb rated at 12V, 16W, and the two share the same base type.
For the 2014-2016 Grand Cherokee, the brake lighting system was split into separate Inner Brake and Outer Brake positions. The inner position used the 7440, while the outer position retained the 3157.
The 7440 is a single-filament T20 wedge bulb rated at 12V, 21W. Its single-filament design and T20 wedge base make it physically and electrically distinct from the dual-filament 3157 used in the outer brake position of the same vehicle.
The split inner and outer brake configuration on the 2014-2016 Grand Cherokee means that two different bulb types are required for a full brake light service on those model years, as the 7440 and 3157 are not interchangeable with each other.