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
Looking for the right bulbs for a 2016 Lexus RX 350? This page is designed to help you verify bulb sizes by lighting position, so you can match the correct replacement to the front, rear, interior, and cargo-area lamps on your vehicle. Because lighting layouts can vary by trim, market, and body style, checking the bulb location first is the safest way to shop.
For the 2016 Lexus RX 350, the listed bulb sizes include common fitments such as 921 for the back up reverse light, 168 for the trunk or cargo area light and interior door light, 7444NA for the front turn signal and parking light, 7440A for the rear turn signal, and 168NA for the front side marker light. Use these references as a starting point and confirm the installed bulb before ordering replacements.
Fitment can differ depending on the trim level, lighting package, and whether your RX 350 uses halogen or LED components in certain positions. Some owners also upgrade to aftermarket LED bulbs, but those conversions may require attention to polarity, load resistors, or compatibility with the vehicle’s lighting system. Before buying anything, remove the existing bulb and compare the base type, connector style, and physical shape to make sure the replacement will fit correctly and function as expected.
The listed bulb size for the back up reverse light on the 2016 Lexus RX 350 is 921.
The trunk or cargo area light uses bulb size 168 on the 2016 Lexus RX 350.
The interior door light bulb is listed as 168 for this model year and model.
The front turn signal light bulb size listed for the 2016 Lexus RX 350 is 7444NA.
The parking light bulb is listed as 7444NA on the 2016 Lexus RX 350.
The rear turn signal light bulb size listed for this vehicle is 7440A.
The front side marker light bulb is listed as 168NA.
Yes. Trim, lighting package, and market differences can change the exact bulb setup, so it is important to verify the bulb by position and compare the installed part before ordering.
Not always. Some lighting positions may differ between halogen and LED-equipped vehicles, and an LED conversion may require a different bulb style or added components for proper operation.
Aftermarket LED bulbs can work, but fitment and performance depend on the application. You may need to check polarity, beam pattern, and whether the vehicle needs resistors or other compatibility parts.
The best method is to remove the installed bulb and compare its base, size, and connector to the replacement. Matching the bulb by location on the vehicle is helpful, but a physical check gives the most reliable result.
It is often a good idea to replace bulbs in pairs for matching brightness and color, especially for turn signals, parking lights, and side markers, even though only one side may have failed.
Some bulb sizes are used in multiple positions on the 2016 Lexus RX 350. For example, 168 is listed for both the trunk or cargo area light and the interior door light, so location matters as much as the bulb number.
If your RX 350 has a different setup than the listed bulb size, check the installed bulb and any owner documentation for your exact trim or market version. Lighting packages and production differences can affect fitment.
