Used for: Back Up Reverse Light Bulb
Used for: Parking Light Bulb, Turn Signal Light Bulb Front
Used for: Side Marker Light Bulb Front
Used for: Turn Signal Light Bulb Rear
Used for: Interior Door Light Bulb, Trunk or Cargo Area Light
If you are looking up bulb sizes for the 2019 Lexus RX 350, this page is meant to help you match the right bulb to each lighting position on the vehicle. The RX 350 can use different bulb types depending on the exact lamp location, and this chart organizes them so you can verify the fit before ordering replacements.
Use the lighting position, not just the vehicle name, when checking replacements. On the 2019 Lexus RX 350, exterior and interior bulbs may differ by trim, market, and lighting package, so a headlight, turn signal, brake light, or cabin light may not all use the same style even on the same model year.
For best results, confirm the trim and equipment on your RX 350 before buying bulbs, especially if the vehicle has LED lighting or an upgraded package. Some positions on this model are listed as LED, while others may use serviceable bulbs such as 7444NA, 7440A, 921, 168NA, or 168. If you are converting from halogen to LED aftermarket bulbs, make sure the replacement is compatible with the socket, polarity, and available space inside the housing. It is also smart to inspect the installed bulb before purchase, since previous repairs, regional differences, or factory options can change what is actually in the vehicle.
It helps you verify bulb sizes by lighting position, such as headlights, fog lights, brake lights, turn signals, license plate lights, and interior lamps. That makes it easier to buy the correct replacement for the exact location that needs service.
Yes. The chart shows the high beam and low beam headlight bulbs as LED for this model year.
The front turn signal light bulb is listed as 7444NA.
The rear turn signal light bulb is listed as 7440A.
The back up reverse light bulb is listed as 921.
The front side marker light bulb is listed as 168NA.
The parking light bulb is listed as 7444NA, and it is noted as optional in the raw list.
Yes. The front fog light bulb is shown as LED.
No. Interior locations can use different bulbs. For example, the glove box light, dome light, and map light are listed as LED, while the trunk or cargo area light and interior door light are listed as 168.
Trim, lighting package, market, and body style can affect bulb fitment. A vehicle with a different package or a previous bulb conversion may not match the standard listing exactly.
Yes. Checking the installed bulb is one of the best ways to avoid a mismatch, especially if the vehicle has been modified, repaired, or equipped with a different lighting package.
Yes, in some positions, but fitment matters. Aftermarket LED conversions should match the socket, size, and electrical requirements, and some housings may need compatible bulbs to avoid issues.
