
PIAA 19615 9005 (HB3) Xtreme White Plus
$64.57
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Used for: Headlight Bulb High Beam, Headlight Bulb Low Beam(with projector-type headlights)
Used for: Headlight Bulb Low Beam(without projector-type headlights)
Used for: Back Up Reverse Light Bulb (with projector-type headlights)
Used for: Back Up Reverse Light Bulb (without projector-type headlights), Center High Mount Stop Light Bulb, Trunk or Cargo Area Light
Used for: Brake Light Bulb(without projector-type headlights)
Used for: License Plate Light Bulb, Glove Box Light Bulb
Used for: License Plate Light Bulb, Glove Box Light Bulb
Used for: Parking Light Bulb(without projector-type headlights), Side Marker Light Bulb Front(without projector-type headlights), Turn Signal Light Bulb Front(without projector-type headlights)
Used for: Side Marker Light Bulb Rear(without projector-type headlights)
Used for: Tail Light Bulb(without projector-type headlights)
Used for: Turn Signal Light Bulb Rear(without projector-type headlights)
Used for: Engine Compartment Light Bulb
Used for: Map Light Bulb
This 2018 RAM 3500 bulb size guide helps you verify the correct replacement bulb by lighting position, so you can match the right part before you buy. Because trim level, body style, and lighting package can change the fitment, it is important to check the exact lamp location on your truck rather than relying on a single bulb number for the whole vehicle.
Use this page to find common exterior and interior bulb sizes for the 2018 RAM 3500, including headlights, brake lights, turn signals, side markers, reverse lights, license plate lights, map lights, and cargo-area lighting. Some positions use different bulbs depending on whether the truck has projector-type headlights, so the chart is organized to make those differences easier to spot.
For the best fit, compare your truck’s trim and lighting package with the bulb chart before ordering. The 2018 RAM 3500 may use halogen bulbs in some configurations and LED units in others, and aftermarket LED conversions can change the required bulb type, socket fit, or warning behavior. If you are replacing a bulb that is hard to identify, remove the installed bulb and check the number printed on the base before purchase. This is especially helpful for exterior lamps that differ between projector-type and non-projector headlight setups, or when a previous owner has already modified the lighting.
It helps you confirm the correct bulb size by lighting position, such as headlight, brake light, reverse light, or license plate light. That makes it easier to choose the right replacement for your specific 2018 RAM 3500 configuration.
No. Trim and lighting package can vary by market and body style, so some bulb sizes differ between trucks. Always match the bulb to the exact lamp position and check whether your truck has projector-type headlights.
High beam uses 9005. Low beam uses 9005 on models with projector-type headlights, and H11 on models without projector-type headlights.
Front turn signal bulbs vary by headlight setup. With projector-type headlights, the front turn signal uses LED. Without projector-type headlights, it uses 3157A.
Rear turn signal bulbs also vary by configuration. With projector-type headlights, the rear turn signal uses LED. Without projector-type headlights, it uses 3057.
With projector-type headlights, the brake light bulb is LED. Without projector-type headlights, the brake light bulb is 3057R.
Without projector-type headlights, the back up reverse light bulb is 921. With projector-type headlights, the back up reverse light bulb is 7440.
The center high mount stop light bulb is 921 on the 2018 RAM 3500.
The license plate light bulb can be 194 or 7441 on the 2018 RAM 3500, depending on the application listed for your truck.
The map light bulb is 578 on the 2018 RAM 3500.
The glove box light bulb can be 194 or 7441 on the 2018 RAM 3500.
Yes. The trunk or cargo area light uses 921, and the engine compartment light bulb is 561. These are useful when replacing interior or under-hood lighting on the 2018 RAM 3500.
Not necessarily. Some positions are already listed as LED, while others use halogen-style bulb numbers such as 9005, H11, 921, 194, 7441, 3157A, 3057, 3057R, 3057A, 7440, 578, and 561. Match the correct type to the socket and housing before upgrading.
Check the bulb location, confirm whether your truck has projector-type headlights, and compare the installed bulb number if possible. This is the safest way to avoid fitment mistakes, especially if the truck has been modified or uses aftermarket lighting.