
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, Headlight Bulb Low Beam(without projector-type headlights)
Used for: Back Up Reverse Light Bulb, Back Up Reverse Light Bulb (without projector-type headlights), Center High Mount Stop Light Bulb, Trunk or Cargo Area Light
Used for: Back Up Reverse Light Bulb (with projector-type headlights)
Used for: Brake Light Bulb, Tail Light Bulb, Tail Light Bulb(without projector-type headlights)
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(with 2 headlights), Turn Signal Light Bulb Front(with 2 headlights), Turn Signal Light Bulb Rear
Used for: Parking Light Bulb(with 4 headlights), Parking Light Bulb(without projector-type headlights), Side Marker Light Bulb Front, Side Marker Light Bulb Front(without projector-type headlights), Turn Signal Light Bulb Front(with 4 headlights), Turn Signal Light Bulb Front(without projector-type headlights)
Used for: Side Marker Light Bulb Rear(without projector-type headlights)
Used for: Turn Signal Light Bulb Rear(without projector-type headlights)
Used for: Ash Tray Light Bulb
Used for: Dome Light Bulb, Map Light Bulb
Used for: Engine Compartment Light Bulb
Used for: Map Light Bulb
This 2018 RAM 1500 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, headlight style, and lighting package can change the fitment, the bulb chart on this page is organized by location to make it easier to compare the exact lamp on your truck.
For the 2018 RAM 1500, some exterior bulbs use halogen sizes while other versions use LED or different sockets depending on projector-type headlights, non-projector headlights, or other package differences. Use this page to check headlights, tail lights, brake lights, turn signals, reverse lights, marker lights, interior lights, and cargo-area lighting for the most likely bulb size in your specific configuration.
Before ordering, confirm whether your truck has projector-type headlights, standard headlights, or a special lighting package, since the 2018 RAM 1500 can use different bulb sizes for the same function. Also remember that halogen and LED bulbs are not always direct swaps: aftermarket LED conversions may need additional resistors, adapters, or different beam patterns to work correctly. The safest approach is to check the bulb already installed in the vehicle, compare the socket and base style, and then purchase the replacement that matches both the position and the actual fitment on your truck.
The low beam bulb can be H11 on trucks without projector-type headlights, or 9005 on versions with projector-type headlights. Always confirm the headlight style before ordering.
The high beam bulb is listed as 9005 for the 2018 RAM 1500.
Brake light fitment varies by headlight setup. Trucks with projector-type headlights use LED brake light bulbs in the chart, while trucks without projector-type headlights use 3157R or 3057R depending on the listed configuration.
Tail light fitment also depends on the lighting package. The chart shows LED tail light bulbs for projector-type setups, 3157R for some versions, and 3057R for trucks without projector-type headlights.
Front turn signal bulbs vary by configuration. The chart lists LED front turn signal bulbs for projector-type setups, 3157A for several non-projector versions, and 3157 for some trucks with 2-headlight or 4-headlight setups.
Rear turn signal bulbs are listed as LED for projector-type headlights, 3157 for some versions, and 3057 for trucks without projector-type headlights.
The reverse light bulb is 921 on some configurations, and 7440 on the version with projector-type headlights. Check your headlight style before buying.
The center high mount stop light bulb size listed for the 2018 RAM 1500 is 921.
Both the license plate light and glove box light are listed as 194 or 7441, depending on the exact lamp assembly.
The dome light bulb is 578. The map light is listed as 578 or 212-2.
Yes. The chart shows different bulb sizes for several positions, including low beam, brake light, tail light, turn signal, parking light, side marker, and reverse light depending on whether the truck has projector-type headlights.
Yes. Checking the installed bulb is the best way to confirm fitment, especially on a 2018 RAM 1500 where trim, market, body style, and lighting package can change the bulb size.