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Acura ILX 2018 Bulb Size
Bulb size chart
Fog Light Bulb Front - H11 LED, H16 LED
Headlight Bulb High Beam - LED
Headlight Bulb High Beam and Low Beam - LED
Headlight Bulb Low Beam - LED
Back Up Reverse Light Bulb - 921
Brake Light Bulb - LED
Center High Mount Stop Light Bulb - LED
Daytime Running Light Bulb - LED
License Plate Light Bulb - 168, 917
Parking Light Bulb - LED
Side Marker Light Bulb Front - 168NA
Side Marker Light Bulb Rear - LED
Tail Light Bulb - LED
Turn Signal Light Bulb Front - LED
Turn Signal Light Bulb Rear - 7440A
Dome Light Bulb - 194, 7441
Glove Box Light Bulb - LED
Map Light Bulb - LED
Trunk or Cargo Area Light - 168, 917
Vanity Mirror Light Bulb - 6615F
H11 LED Bulbs
Used for: Fog Light Bulb Front
H16 LED Bulbs
Used for: Fog Light Bulb Front
921 Bulbs
Used for: Back Up Reverse Light Bulb
168 Bulbs
Used for: License Plate Light Bulb, Trunk or Cargo Area Light
917 Bulbs
Used for: License Plate Light Bulb, Trunk or Cargo Area Light
168NA Bulbs
Used for: Side Marker Light Bulb Front
7440A Bulbs
Used for: Turn Signal Light Bulb Rear
194 Bulbs
Used for: Dome Light Bulb
7441 Bulbs
Used for: Dome Light Bulb
6615F Bulbs
Used for: Vanity Mirror Light Bulb
This page helps you verify bulb sizes for the 2018 Acura ILX by lighting position, so you can match the correct replacement before you buy. Whether you are checking the headlights, interior lights, or exterior signal bulbs, the goal is to make fitment easier and reduce guesswork.
The 2018 Acura ILX uses several LED lighting positions, along with a few replaceable bulb types in specific locations. Because trim and lighting package details can vary, it is smart to confirm the exact lamp position on your vehicle and compare it with the bulb chart on this page.
For best results, compare the bulb listing with your trim, package, and market configuration before ordering. Some 2018 Acura ILX models use LED assemblies in places where other vehicles use replaceable halogen bulbs, and aftermarket LED conversions may not fit or function the same way as factory equipment. If you are replacing a serviceable bulb, check the old bulb first for its printed number, base style, and shape so you can avoid ordering the wrong part. This is especially helpful for items like the fog lights, reverse light, license plate lights, dome light, and vanity mirror light, where similar-looking bulbs can have different fitment.
FAQ
What bulb sizes does the 2018 Acura ILX use for the headlights?
The chart for the 2018 Acura ILX shows LED headlight configurations, including High Beam and Low Beam LED listings, plus a separate High Beam LED and Low Beam LED listing. That means the exact headlamp setup can depend on the vehicle’s lighting package and should be matched to the position on the car.
Are the daytime running lights on the 2018 Acura ILX replaceable bulbs?
The daytime running light on the 2018 Acura ILX is listed as LED. In many cases, that means the light is part of an LED assembly rather than a simple plug-in bulb, so fitment should be verified by position before attempting replacement.
What is the rear turn signal bulb size for the 2018 Acura ILX?
The rear turn signal light bulb is listed as 7440A for the 2018 Acura ILX. Always confirm the side and lamp position before ordering, since rear lighting layouts can vary by trim or market.
What bulb does the front side marker use on this model year?
The front side marker light bulb for the 2018 Acura ILX is listed as 168NA. This is a useful fitment check because the front and rear side marker positions do not use the same bulb type.
What bulb size is used for the license plate lights?
The license plate light bulb on the 2018 Acura ILX is listed as 168 or 917. Either listing may appear depending on the catalog or bulb brand, so it is a good idea to match the installed bulb before purchase.
What bulb does the reverse light use on the 2018 Acura ILX?
The back up reverse light bulb is listed as 921. If you are replacing it, check the socket and bulb shape carefully, since reverse light housings can be tight and access may differ by body style.
What is the fog light bulb size for the 2018 Acura ILX?
The front fog light bulb is listed as H11 LED or H16 LED, depending on the configuration. Because fog light fitment can vary, confirm which bulb is installed in your vehicle before ordering a replacement.
What bulb is used for the dome light?
The dome light bulb for the 2018 Acura ILX is listed as 194 or 7441. Either size may be referenced in parts catalogs, so checking the existing bulb is the safest way to confirm fitment.
What bulb size is used for the trunk or cargo area light?
The trunk or cargo area light uses 168 or 917 on the 2018 Acura ILX. This is a common interior bulb size, but the exact fit should still be verified against the bulb already installed in the vehicle.
What bulb does the vanity mirror light use?
The vanity mirror light bulb is listed as 6615F for the 2018 Acura ILX. If your mirror light is not working, confirm the bulb type and the lamp housing before replacing it.
Do all 2018 Acura ILX trims use the same bulbs?
Not always. Trim level, lighting package, and market can affect which bulbs or LED assemblies are installed on a 2018 Acura ILX. That is why it is important to verify the exact lighting position on your specific vehicle.
Can I switch the 2018 Acura ILX to aftermarket LED bulbs?
Yes, in some locations, but fitment and performance can vary. Aftermarket LED conversions may not match the factory bulb, may not seat correctly, or may affect beam pattern and warning behavior, so it is best to compare the installed bulb and housing before buying.
What should I check before ordering replacement bulbs for this car?
Check the bulb location, the printed bulb number on the old bulb, and whether your vehicle uses a replaceable bulb or an integrated LED assembly. For the 2018 Acura ILX, this step is especially important because several lighting positions are LED and some bulb sizes vary by trim or package.