What is the low beam headlight bulb size for a 2021 Acura RDX?

The 2021 Acura RDX uses a N/A bulb for the low beam headlights. We recommend upgrading to LED for better visibility.

What is the high beam headlight bulb size for a 2021 Acura RDX?

The high beam bulb size for the 2021 Acura RDX is N/A.

Why are my 2021 Acura RDX headlights dim?

Dim headlights on a 2021 Acura RDX can be caused by aging halogen bulbs, which lose brightness over time, or oxidation (cloudiness) on the plastic headlight lenses. Upgrading to a N/A LED conversion kit can provide a significantly brighter and whiter light output.

Which bulb fits the 2021 Acura RDX fog light?

The 2021 Acura RDX typically does not come with factory fog lights in all trim levels. If your vehicle is equipped with them, check the manual as sizes can vary by trim.

Is the 2021 Acura RDX single or dual beam?

The 2021 Acura RDX uses a dual bulb headlight system. This means you have separate bulbs for high and low beams.

Can I install LED bulbs on my 2021 Acura RDX?

Yes, the 2021 Acura RDX comes with standard halogen bulbs from the factory, but they can be upgraded to LED. You will need a N/A LED conversion kit for the low beams.

Did the 2021 Acura RDX change headlight bulb sizes from the previous year?

Yes — the 2021 Acura RDX uses different bulb sizes than the 2020 model. The 2021 generation introduced this bulb configuration.

Is the 2021 Acura RDX the first or last year to use N/A bulbs?

The 2021 Acura RDX is the only year in the 2021 generation to use the N/A bulb for the low beam headlight.

How do I change the headlight on a 2021 Acura RDX?

Turn off the vehicle and open the hood. Locate the headlight assembly from behind, remove the dust cover or retaining clip, disconnect the wiring harness, twist the old N/A bulb counter-clockwise to remove it, then insert the new bulb and reassemble. The whole process typically takes 10 to 30 minutes per side depending on accessibility.

Are LED headlights legal for a 2021 Acura RDX?

LED bulbs used off-road or in auxiliary lights are legal everywhere. For on-road headlight use, legality varies by state. Many states allow LED retrofits as long as the beam pattern meets DOT standards. For the best legal compliance, choose a DOT-approved N/A LED kit that is designed as a direct replacement and produces a proper cutoff pattern without excessive glare.

How much does it cost to replace 2021 Acura RDX headlights?

A pair of halogen N/A bulbs costs $15 to $40, while LED conversion kits run $25 to $60 per pair. If you have a shop do the work, expect an additional $20 to $50 in labor per bulb. Replacing them yourself at home saves the labor cost and usually takes under 30 minutes.

What is the difference between halogen and LED for a 2021 Acura RDX?

Halogen bulbs produce a warm yellow light (around 3200K), last 500 to 1000 hours, and draw more power. LED bulbs emit a brighter white light (5000-6000K), last 25,000+ hours, and use less energy. LED upgrades for the N/A position are available as direct plug-and-play replacements.

The 2021 Acura RDX has a unique bulb configuration not shared with adjacent model years.

Fitment Guaranteed for 2021 Acura RDX

What Size Bulbs Does a 2021 Acura RDX Use?

Correct headlight, fog light, and tail light bulb sizes. Sourced from OEM catalog data.

Installation Difficulty

Moderate (Dust covers often present)

Est. Replacement Cost

$15 - $40 (Halogen) / $30+ (LED)

What Lighting System Does the 2021 Acura RDX Have?

When it comes to nighttime visibility, the 2021 Acura RDX relies on an arrangement of 1 specialized bulbs. It features a standard lighting system powered by a dual-bulb halogen configuration using separate low beam and high beam bulbs for precise light distribution. This model belongs to the late years of the RDX's 2007-2022 production span.

Can You Put LED Bulbs in a 2021 Acura RDX?

Upgrading to LED is one of the most effective ways to modernize your Acura's appearance and safety profile. We recommend starting your upgrade with the low beams, as they see the most use. Adding a matching LED kit later will complete the look and ensure consistent lighting performance.

2021 Acura RDX Bulb Size Chart

Position	Bulb Size	Shop
Turn Signal Front	7440NA	Buy 7440NA →

How do the 2021 Acura RDX's bulbs compare to other years?

The 2021 Acura RDX changed bulb sizes from 2020. The previous model year used a different configuration.

The 2022 model switched to a different bulb configuration.

This bulb configuration covers the 2021 model years. ← 2020 2022 →

Finding the best installation guide...

Other RDX Years

2022 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007