What is the low beam headlight bulb size for a 2018 Porsche 718 Cayman?

The 2018 Porsche 718 Cayman uses a HID-D3S 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 Porsche 718 Cayman?

The high beam bulb size for the 2018 Porsche 718 Cayman is HID-D3S LED.

Why are my 2018 Porsche 718 Cayman headlights dim?

Dim headlights on a 2018 Porsche 718 Cayman can be caused by aging halogen bulbs, which lose brightness over time, or oxidation (cloudiness) on the plastic headlight lenses. Upgrading to a HID-D3S LED LED conversion kit can provide a significantly brighter and whiter light output.

Which bulb fits the 2018 Porsche 718 Cayman fog light?

The 2018 Porsche 718 Cayman uses a LED Fog Light bulb for the fog light position.

Is the 2018 Porsche 718 Cayman single or dual beam?

The 2018 Porsche 718 Cayman 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 Porsche 718 Cayman?

Yes, the 2018 Porsche 718 Cayman comes with standard halogen bulbs from the factory, but they can be upgraded to LED. You will need a HID-D3S LED LED conversion kit for the low beams.

Does the 2018 Porsche 718 Cayman have fog lights?

Yes, the 2018 Porsche 718 Cayman takes a LED Fog Light bulb for the fog light position.

How do I change the headlight on a 2018 Porsche 718 Cayman?

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-D3S 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 Porsche 718 Cayman?

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-D3S 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 Porsche 718 Cayman headlights?

A pair of HID HID-D3S LED bulbs costs $50 to $150. 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 Porsche 718 Cayman?

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-D3S LED position are available as direct plug-and-play replacements.

This vehicle is part of the 2017–2019 Porsche 718 Cayman generation. All models in this range share identical light bulb sizes.

Fitment Guaranteed for 2018 Porsche 718 Cayman

What Size Bulbs Does a 2018 Porsche 718 Cayman Use?

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

Installation Difficulty

Hard (Tight clearances)

Est. Replacement Cost

$50 - $150 (HID System)

What Lighting System Does the 2018 Porsche 718 Cayman Have?

Lighting on the 2018 Porsche 718 Cayman is managed by a total of 11 bulbs, covering everything from primary headlights to signal indicators. It features an extensive lighting system powered by premium factory HID/Xenon technology utilizing D3S projector housings for high-intensity output.

Can You Put LED Bulbs in a 2018 Porsche 718 Cayman?

The 2018 Porsche 718 Cayman is already equipped with factory D3S HID/Xenon headlights. Since HID technology already provides exceptional brightness, we recommend staying with high-quality OEM replacement bulbs rather than attempting an LED retrofit for the primary headlights. However, the LED Fog Light fog lights are typically halogen and are excellent candidates for an LED upgrade to match the color temperature of your HID headlights.

2018 Porsche 718 Cayman Bulb Size Chart

Position	Bulb Size	Shop
Low Beam	HID-D3S LED	Buy HID-D3S LED →
High Beam	HID-D3S LED	Buy HID-D3S LED →
Fog Light	LED Fog Light	Buy LED Fog Light →
Brake Light	LED Bulb	Buy LED Bulb →
Side Marker	LED Bulb	Buy LED Bulb →
Turn Signal Front	LED Bulb	Buy LED Bulb →
Turn Signal Rear	LED Bulb	Buy LED Bulb →
Reverse Light	LED Bulb	Buy LED Bulb →
License Plate	LED Bulb	Buy LED Bulb →
Parking Light	LED Bulb	Buy LED Bulb →
Trunk Light	2886X	Buy 2886X →

Installation Guide

Open in YouTube →

Video suggestion: Installation GuideBy YouTube

Other 718 Cayman Years

2019 2017

More from Porsche

718 Boxster 718 Cayman 911 912 924 928 944 968

Other Vehicles That Use HID-D3S LED Bulbs

2023 Chevrolet Camaro 2022 Dodge Charger 2022 Dodge Durango 2022 Hyundai Ioniq 2022 Kia Sportage 2021 Dodge Challenger