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

The 2018 Acura TLX 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 TLX?

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

Why are my 2018 Acura TLX headlights dim?

Dim headlights on a 2018 Acura TLX 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 TLX fog light?

The 2018 Acura TLX uses a Fog Light bulb for the fog light position.

Is the 2018 Acura TLX single or dual beam?

The 2018 Acura TLX 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 TLX?

Yes, the 2018 Acura TLX 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 TLX have fog lights?

Yes, the 2018 Acura TLX takes a Fog Light bulb for the fog light position.

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

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 TLX?

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 TLX 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 TLX?

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.

This vehicle is part of the 2017–2020 Acura TLX generation. All models in this range share identical light bulb sizes.

Fitment Guaranteed for 2018 Acura TLX

What Size Bulbs Does a 2018 Acura TLX 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 TLX Have?

Owners of the 2018 Acura TLX will find a total of 9 lighting elements throughout the vehicle's exterior. 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 TLX's 2015-2020 production span.

Can You Put LED Bulbs in a 2018 Acura TLX?

Upgrading to LED is one of the most effective ways to modernize your Acura's appearance and safety profile. Since your TLX 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 Fog Light fog lights; switching these to LED can dramatically improve your visibility in adverse weather.

2018 Acura TLX Bulb Size Chart

Position	Bulb Size	Shop
Low Beam	LED Headlights	Buy LED Headlights →
High Beam	LED Headlights	Buy LED Headlights →
Fog Light	Fog Light	Buy Fog Light →
Brake Light	Brake Light Assembly	Buy Brake Light Assembly →
Turn Signal Front	LED Light Bulbs	Buy LED Light Bulbs →
Parking Light	LED Light Bulbs	Buy LED Light Bulbs →
Turn Signal Rear	7440	Buy 7440 →
Reverse Light	7440	Buy 7440 →
Trunk Light	168 or 194	Buy 168 or 194 →