What is the low beam headlight bulb size for a 2018 Acura RLX?

The 2018 Acura RLX uses a LED Headlights bulb for the low beam headlights. We recommend upgrading to LED for better visibility.

What is the high beam headlight bulb size for a 2018 Acura RLX?

The high beam bulb size for the 2018 Acura RLX is LED Headlights.

Why are my 2018 Acura RLX headlights dim?

Dim headlights on a 2018 Acura RLX can be caused by aging halogen bulbs, which lose brightness over time, or oxidation (cloudiness) on the plastic headlight lenses. Upgrading to a LED Headlights LED conversion kit can provide a significantly brighter and whiter light output.

Which bulb fits the 2018 Acura RLX fog light?

The 2018 Acura RLX uses a LED Fog Lights bulb for the fog light position.

Is the 2018 Acura RLX single or dual beam?

The 2018 Acura RLX uses a single bulb (dual filament) headlight system. This means one bulb controls both high and low beams.

Can I install LED bulbs on my 2018 Acura RLX?

Yes, the 2018 Acura RLX comes with standard halogen bulbs from the factory, but they can be upgraded to LED. You will need a LED Headlights LED conversion kit for the low beams.

Does the 2018 Acura RLX have fog lights?

Yes, the 2018 Acura RLX takes a LED Fog Lights bulb for the fog light position.

Did the 2018 Acura RLX change headlight bulb sizes from the previous year?

Yes — the 2018 Acura RLX uses different bulb sizes than the 2017 model. The 2018–2020 generation introduced this bulb configuration.

How do I change the headlight on a 2018 Acura RLX?

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 LED Headlights 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 2018 Acura RLX?

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 LED Headlights 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 2018 Acura RLX headlights?

A pair of halogen LED Headlights 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 2018 Acura RLX?

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 LED Headlights position are available as direct plug-and-play replacements.

The 2018 Acura RLX is the first model year to use this bulb configuration (2018–2020).

Fitment Guaranteed for 2018 Acura RLX

What Size Bulbs Does a 2018 Acura RLX 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 2018 Acura RLX Have?

When it comes to nighttime visibility, the 2018 Acura RLX relies on an arrangement of 10 specialized bulbs. It features a comprehensive lighting system powered by factory-integrated LED technology, which offers superior longevity and a modern cool-white appearance compared to traditional bulbs. This model belongs to the mid years of the RLX's 2014-2020 production span.

Can You Put LED Bulbs in a 2018 Acura RLX?

Upgrading to LED is one of the most effective ways to modernize your Acura's appearance and safety profile. Since your RLX uses a single LED Headlights bulb for both high and low beams, ensure your chosen LED kit is "dual-beam" compatible. This allows the LED circuitry to mimic the two-filament design of the original halogen bulb. Don't forget the LED Fog Lights fog lights; switching these to LED can dramatically improve your visibility in adverse weather.

2018 Acura RLX Bulb Size Chart

Position	Bulb Size	Shop
Low Beam	LED Headlights	Buy LED Headlights →
High Beam	LED Headlights	Buy LED Headlights →
Fog Light	LED Fog Lights	Buy LED Fog Lights →
Brake Light	Brake Light Assembly	Buy Brake Light Assembly →
Side Marker	LED Bulb	Buy LED Bulb →
Turn Signal Front	LED Bulb	Buy LED Bulb →
Parking Light	LED Bulb	Buy LED Bulb →
Turn Signal Rear	LED Bulb	Buy LED Bulb →
Reverse Light	LED Bulb	Buy LED Bulb →
Trunk Light	168	Buy 168 →

How do the 2018 Acura RLX's bulbs compare to other years?

The 2018 Acura RLX changed bulb sizes from 2017. The previous model year used a different configuration.

The 2019 model continues with the same bulb sizes.

This bulb configuration covers the 2018–2020 model years. ← 2017 2019 →

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Other RLX Years

2020 2019 2017 2016 2015 2014