What is the low beam headlight bulb size for a 2018 Alfa Romeo Giulia?

The 2018 Alfa Romeo Giulia uses a HID-D5S LED 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 Alfa Romeo Giulia?

The high beam bulb size for the 2018 Alfa Romeo Giulia is HID-D5S LED.

Why are my 2018 Alfa Romeo Giulia headlights dim?

Dim headlights on a 2018 Alfa Romeo Giulia can be caused by aging halogen bulbs, which lose brightness over time, or oxidation (cloudiness) on the plastic headlight lenses. Upgrading to a HID-D5S LED LED conversion kit can provide a significantly brighter and whiter light output.

Which bulb fits the 2018 Alfa Romeo Giulia fog light?

The 2018 Alfa Romeo Giulia uses a H11 LED bulb for the fog light position.

Is the 2018 Alfa Romeo Giulia single or dual beam?

The 2018 Alfa Romeo Giulia 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 Alfa Romeo Giulia?

Yes, the 2018 Alfa Romeo Giulia comes with standard halogen bulbs from the factory, but they can be upgraded to LED. You will need a HID-D5S LED LED conversion kit for the low beams.

Does the 2018 Alfa Romeo Giulia have fog lights?

Yes, the 2018 Alfa Romeo Giulia takes a H11 LED bulb for the fog light position.

Did the 2018 Alfa Romeo Giulia change headlight bulb sizes from the previous year?

No — the 2018 Alfa Romeo Giulia uses the same bulb sizes as the 2017 model. This configuration has been consistent across the 2017–2019 generation.

How do I change the headlight on a 2018 Alfa Romeo Giulia?

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 HID-D5S LED 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 Alfa Romeo Giulia?

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 HID-D5S LED 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 Alfa Romeo Giulia headlights?

A pair of halogen HID-D5S LED 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 Alfa Romeo Giulia?

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 HID-D5S LED position are available as direct plug-and-play replacements.

The 2018 Alfa-Romeo Giulia shares its bulb sizes with the 2017–2019 generation.

Fitment Guaranteed for 2018 Alfa-Romeo Giulia

What Size Bulbs Does a 2018 Alfa-Romeo Giulia 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 Alfa-Romeo Giulia Have?

When it comes to nighttime visibility, the 2018 Alfa-Romeo Giulia relies on an arrangement of 11 specialized bulbs. It features an extensive lighting system powered by a halogen-based setup where a single HID-D5S LED dual-filament bulb handles both low and high beam duties within the same reflector.

Can You Put LED Bulbs in a 2018 Alfa-Romeo Giulia?

Upgrading to LED is one of the most effective ways to modernize your Alfa-Romeo's appearance and safety profile. Since your Giulia uses a single HID-D5S LED 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 H11 LED fog lights; switching these to LED can dramatically improve your visibility in adverse weather.

2018 Alfa-Romeo Giulia Bulb Size Chart

Position	Bulb Size	Shop
Low Beam	HID-D5S LED	Buy HID-D5S LED →
High Beam	HID-D5S LED	Buy HID-D5S LED →
Fog Light	H11 LED	Buy H11 LED →
Brake Light	Brake Light Assembly	Buy Brake Light Assembly →
Dome Light	LED Bulb	Buy LED Bulb →
Side Marker	LED Bulb	Buy LED Bulb →
Turn Signal Front	5200	Buy 5200 →
Parking Light	LED Bulb	Buy LED Bulb →
Turn Signal Rear	LED Bulb	Buy LED Bulb →
Reverse Light	LED Bulb	Buy LED Bulb →
Trunk Light	2825	Buy 2825 →

How do the 2018 Alfa-Romeo Giulia's bulbs compare to other years?

The 2018 Alfa-Romeo Giulia uses the same bulbs as the 2017 model.

The 2019 model continues with the same bulb sizes.

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

Finding the best installation guide...

Other Giulia Years

2022 2021 2020 2019 2017

More from Alfa-Romeo

164 4C Milano Spider Spider Graduate Spider Quadrifoglio Spider Veloce Stelvio

Other Vehicles That Use HID-D5S LED Bulbs

2019 Alfa Romeo 4C 2019 Alfa Romeo Giulia 2019 Audi A3 2019 Audi A4 2019 Audi A4 Allroad 2019 Audi A4 Quattro