Used for: Dome Light Bulb
Used for: Dome Light Bulb
Used for: Interior Door Light Bulb
Used for: Interior Door Light Bulb
Used for: Trunk or Cargo Area Light
This page helps you find the right bulb sizes for the 2018 Infiniti Q50 by lighting position, so you can match the correct replacement to each exterior and interior lamp. Because the Q50 can use different lighting setups depending on trim, market, and body style, checking the bulb chart by location is the safest way to verify fitment before you buy.
For the 2018 Infiniti Q50, many of the major exterior lights are listed as LED, including the headlight high and low beam, fog light, daytime running light, turn signals, brake light, tail light, and reverse light. Interior and cargo lamps may still use conventional bulb types, so this page is useful whether you are replacing a single failed bulb or comparing several locations at once.
Fitment can vary on the 2018 Infiniti Q50 depending on trim level, lighting package, and regional market, so always compare the bulb position on your vehicle with the chart before ordering. Some Q50 models use factory LED assemblies that are not serviced with a simple replaceable bulb, while others may have separate bulbs in interior locations or certain marker lamps. If you are considering an aftermarket LED conversion, make sure the bulb base, polarity, and physical clearance are correct, and remember that some upgrades may require additional resistors or adapters to avoid warning messages or hyperflash. The best practice is to inspect the installed bulb before purchase whenever possible, especially for interior lights and any trim-specific exterior lamp.
The chart lists the headlight high beam and low beam as LED for the 2018 Infiniti Q50. That means the headlamp assembly is not shown here as a standard replaceable halogen bulb size.
Yes. The front fog light bulb position is listed as LED on this page for the 2018 Infiniti Q50.
The license plate light bulb position is listed as LED. Use the chart to confirm the exact lamp style on your specific vehicle before ordering a replacement.
Yes. The brake light bulb position is listed as LED for the 2018 Infiniti Q50.
The rear turn signal light bulb position is listed as LED. Because lighting packages can differ, it is still a good idea to verify the lamp assembly on the car.
The map light bulb is listed as LED, while the dome light bulb is listed with 194 and 7441. This means the interior lamps may not all use the same bulb style.
The interior door light bulb is listed as 168 and 917. Those are the bulb types shown on this page for that location.
The trunk or cargo area light is listed as 158. Check the installed bulb in your vehicle to confirm the exact match before buying.
No. Trim, lighting package, market, and body style can change the bulb setup. This page is organized by lighting position so you can verify each location separately.
Not always. Some LED exterior lights are part of a sealed or integrated assembly, so the service method may differ from a traditional bulb swap. Always check the specific lamp design on your vehicle.
Check the bulb position, the bulb type shown in the chart, and the installed bulb or lamp assembly on your vehicle. This is especially important for the 2018 Infiniti Q50 because some lighting items vary by trim and package.
No. Even if the base fits, some aftermarket LED bulbs may need polarity correction, adapters, or load resistors. Make sure the bulb matches the socket and the vehicle’s electrical requirements before installation.
