Porsche Cayenne 957 Headlight Wiring Harness
What This Harness Solves
Many 957 Cayenne headlights suffer from brittle, deteriorating internal wiring insulation over time. This harness replaces the failing wiring to restore reliable headlight operation and long-term durability. These are sold individually. If you need to replace the harness in both headlights, please order a quantity of two.
Advanced Installation – NOT Plug and Play
This replacement headlight wiring harness is designed for:
This is a universal-style replacement harness engineered to correct deteriorated factory wiring inside the headlight assembly.
⚠️ Important – Read Before Purchasing
This is NOT a plug-and-play product.
Installation requires:
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Splicing into the factory Xenon plug (for HID models)
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Cutting and connecting factory wiring
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Soldering and properly insulating connections
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Complete disassembly of the entire headlight assembly
Because this harness supports multiple years and configurations, some wires may not be used, depending on your specific model, trim level, and lighting setup. This is normal. Installation requires matching up every wire individually to ensure proper connection.
Installation Difficulty: 8/10
This is not a quick connector swap.
Expect:
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Several hours of labor at minimum
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Possibly a full day depending on experience
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Full headlight teardown and careful reassembly
This project is best suited for:
If you are expecting a 5-minute install, this product is not for you.
Professional Installation Option Available
For customers who prefer not to perform the installation themselves, you may select the “Send In Your Lights for Installation” option in the drop-down menu.
With this option:
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You ship your headlights to us
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We professionally install the harness
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The completed headlights are returned to you
This service is available for an additional cost.
