Mack MRU Turn Signal Bulb Size
The Mack MRU rear turn signal bulb size is 1157, a specification applicable to the vehicle model across its production range. Replacement bulb data within the chart covers 2011 through 2017.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
Rear Turn Signal
| Years | Bulb Size |
|---|---|
| 2011-2017 | 1157 |
Bulb Specifications
| Description | Bulb Size |
|---|---|
| ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V, 21W/5W. | 1157 |