2021 Ram 3500 Bulb Sizes
The short answer
The 2021 Ram 3500 uses an H11 low-beam bulb.
Some values on this page are still waiting for a second source. We show what we have and mark it; confirm against your owner's manual before you buy.
Shop buttons go to Amazon. As an Amazon Associate, FitsYourCar earns from qualifying purchases; it never changes a size we list. How we make money.
Bulb sizes
Low beam
H11 Search Amazon for H11 bulbs
High beam
9005 Search Amazon for 9005 bulbs
Fog light
H11 Search Amazon for H11 bulbs
Front turn signal
7444NA Search Amazon for 7444NA bulbs
Rear turn signal
3157K Search Amazon for 3157K bulbs
Brake light
3157K Search Amazon for 3157K bulbs
Tail light
3157K Search Amazon for 3157K bulbs
Reverse light
921 Search Amazon for 921 bulbs
License plate
194 Search Amazon for 194 bulbs
Key fob, battery and sensors
Key fob battery
CR2450 Search Amazon for CR2450
Dimensions, weight and fuel
Fuel
Gasoline
Octane
87 (regular)
Worth knowing about the 2021 3500
- Bulbs. Codes are for halogen reflector headlamps and base rear lamps; the manual lists long-life H11LL and 9005LL bulbs, and LED headlamp and premium rear lamp packages are sealed.
- Wheels. Single-rear-wheel trucks take 130 lb-ft on cone nuts per the owner's manual, and dual-rear-wheel trucks take 129 lb-ft on flat-face nuts per Ram recall 21V-398, which corrected the 140 lb-ft printed in the manual.
- Fuel. The Cummins diesel version runs on ultra-low-sulfur diesel, and tank size depends on cab, bed and engine.