Acura ILX 2021 Bulb Size
Bulb size chart
This 2021 Acura ILX bulb size page is designed to help you verify the correct bulbs by lighting position before you buy replacements. Whether you are changing a headlight, interior light, or exterior signal lamp, the goal is to match the bulb type to the exact location on the car.
The 2021 Acura ILX uses a mix of LED lighting and a few conventional bulb types, so fitment can vary by lamp position. Use this page as a quick reference for the most common bulb sizes listed for the model and compare them with the bulb already installed in your vehicle.
For the best fit, always confirm your ILX trim, lighting package, and market-specific equipment before ordering bulbs. Some positions on the 2021 Acura ILX are LED assemblies, while others use replaceable halogen-style or incandescent bulbs, and aftermarket LED conversion bulbs may not fit or function the same way as original equipment. If your car has optional fog lights or different rear lighting equipment, check the installed bulb directly before purchase so you do not rely on a generic listing alone.
FAQ
What bulb size does the 2021 Acura ILX use for the low beam headlight?
The low beam headlight is listed as LED on the 2021 Acura ILX. In some listings, the headlight system may be shown as a combined high beam and low beam LED setup, so it is important to confirm the exact lamp style on your vehicle before replacing anything.
What bulb size does the 2021 Acura ILX use for the high beam headlight?
The high beam headlight is listed as LED for the 2021 Acura ILX. Because the headlight design is LED-based, replacement may involve the full lamp assembly or an LED service part rather than a simple bulb swap.
Does the 2021 Acura ILX have LED daytime running lights?
Yes. The daytime running light bulb is listed as LED for the 2021 Acura ILX. If the DRL is not working, check whether the issue is a bulb, module, wiring, or the complete LED unit depending on the lamp design.
What is the brake light bulb size on a 2021 Acura ILX?
The brake light bulb is listed as LED. On LED-equipped rear lamps, the light source may be integrated into the housing, so replacement methods can differ from traditional bulb-only brake lights.
What bulb does the rear turn signal use on the 2021 Acura ILX?
The rear turn signal light bulb is listed as 7440A. This is a specific bulb type used for the rear signal position, so it should not be confused with the front turn signal or other exterior bulbs.
What bulb size is used for the front turn signal on the 2021 Acura ILX?
The front turn signal light bulb is listed as LED. Since the front signal is LED on this model, confirm whether your vehicle has a serviceable bulb or a sealed LED lamp before ordering parts.
What are the fog light bulb options for the 2021 Acura ILX?
The front fog light bulb is listed as H11 LED or H16 LED, depending on the specific configuration. Fog light fitment can vary, so check the existing bulb and the lamp housing before buying replacements.
What bulb size is used for the license plate lights on a 2021 Acura ILX?
The license plate light bulb is listed as 168 or 917. Either size may appear in fitment references, so it is a good idea to compare the old bulb number with the replacement before installing new bulbs.
What bulb does the dome light use in the 2021 Acura ILX?
The dome light bulb is listed as 194 or 7441. Interior bulb fitment can vary by trim and equipment, so checking the bulb already installed is the safest way to confirm the correct replacement.
What bulb size is used for the back up reverse light on the 2021 Acura ILX?
The back up reverse light bulb is listed as 921. This is a common reverse-light size, but you should still verify the bulb in your specific vehicle before purchase.
Are the map light and glove box light bulbs the same on the 2021 Acura ILX?
Both the map light bulb and glove box light bulb are listed as LED on the 2021 Acura ILX. Even when both are LED, the exact replacement method can differ depending on the housing and trim level.
Why should I check my trim or lighting package before buying bulbs for a 2021 Acura ILX?
Trim and lighting package can change the bulb type, especially for headlights, fog lights, and some rear lamps. Checking your trim helps you avoid ordering the wrong bulb size for a position that may be LED on one version and a replaceable bulb on another.
Can I switch the 2021 Acura ILX from halogen-style bulbs to LED aftermarket bulbs?
Some positions may accept aftermarket LED conversions, but fitment and performance are not always the same as factory lighting. Always confirm bulb base, polarity, clearance, and beam pattern before converting, especially for headlights and fog lights.