PORSCHE 991.1 HEADLIGHTS PDLS 99163117104,99163117204
OEM Porsche 911 (991.1) Bi-Xenon Headlights with Porsche Dynamic Light System (PDLS) are the standard high-performance lighting units for the first-generation 991.
The part numbers 991.631.171.04 (Left) and 991.631.172.04 (Right) identify the Silver/Chrome internal housing variant. These were the primary factory fitment for the Carrera, Carrera S, and early Turbo models before the full LED transition.
Technical Specifications & Details
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Technology: Bi-Xenon (High and Low beam in a single projector).
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PDLS Features: * Dynamic Cornering: The projector swivels into turns based on steering angle and vehicle speed.
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Speed-Sensitive Range Control: Adjusts the light cone for better visibility at highway speeds.
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Aesthetics: Classic silver/chrome internal shrouds with a clear outer lens.
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Compatibility: Designed specifically for the 2012–2016 Porsche 911 (991.1).
Fitment Matrix
| Model | Year Range | Compatibility Note |
| 911 Carrera / S / GTS | 2012–2016 | Direct Plug-and-Play replacement. |
| 911 Turbo / Turbo S | 2014–2016 | Compatible (if not equipped with Full LED). |
| 911 GT3 | 2014–2016 | Direct Fit. |
| 991.2 (2017+) | 2017–2019 | No. Fender and bumper profiles differ significantly. |
Professional Listing / SEO Description
If you are adding these to your luxury parts inventory, here is a professional description:
Headline: Genuine Porsche 911 (991.1) Bi-Xenon PDLS Headlights (L+R) | 99163117104 99163117204
“Available for immediate shipping: a matched pair of OEM Porsche 991.1 Bi-Xenon Headlights with PDLS. These units feature the factory silver-shrouded projectors and active cornering technology for superior nighttime performance. Removed from a low-mileage vehicle; lenses are clear and free of major pitting, UV yellowing, or internal hazing.
Part Numbers: 991.631.171.04 (L) & 991.631.172.04 (R).
Condition: Grade A. Fully tested and ready for installation. Perfect for a direct replacement or a front-end refresh.”
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