Dodge Sprinter brake bulbs utilize P21/5W and 1156 bulb sizes for stop light applications, with the center high mount stop light also requiring a 1156 size bulb. The replacement chart covers 2003 through 2009 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 Dodge Sprinter brake light circuit uses two distinct bulb standards across its model years: the P21/5W, which follows ECE (European/international) standards, and the 1156, which follows ANSI standards common to the United States and Canada.
The P21/5W is a dual-filament bulb rated at 12V with a 21W primary filament and a 5W secondary filament, mounted on a BAY15d bayonet base. The dual-filament design allows a single bulb to serve both a running light function and a brighter stop light function.
The 1156 is a single-filament bulb rated at 12V and 21W, mounted on a BA15s bayonet base. Because it carries only one filament, it operates in a dedicated on/off capacity rather than a combined running and stop light role.
The BAY15d base of the P21/5W and the BA15s base of the 1156 are physically incompatible. Although both use a 15mm bayonet-style base, the BAY15d has offset locking pins while the BA15s has a single-position pin, making the two bulbs non-interchangeable.
For the Dodge Sprinter brake lights, the P21/5W fitment applies to the 2003-2006 and 2009 model years, while the 1156 fitment applies to the 2007-2008 model years.
The 2008 model year represents a transition point in the brake light specification, shifting from the P21/5W used in prior years to the single-filament 1156 standard.
The 2009 model year returns to the P21/5W specification after the 2007-2008 use of the 1156, indicating that the two standards were applied across non-consecutive groupings of model years.
The Center High Mount Stop Light on the Dodge Sprinter uses the 1156 bulb exclusively across the 2003-2006 model years, regardless of which bulb type the main brake lights used in those same years.
For the 2003-2006 model years, the main brake lights and the Center High Mount Stop Light on the Dodge Sprinter require different bulb types, with the main positions taking the P21/5W and the center high mount position taking the 1156.
Substituting a P21/5W in a socket designed for a 1156, or vice versa, is not possible without a base adapter, as the pin configurations of the BAY15d and BA15s bases are mechanically distinct.