Porsche Cayman Headlight Bulb Size

Additional Notes

• The H9 bulb is the most consistently used high beam type across the Porsche Cayman's halogen headlamp configurations, appearing in that role from 2006 through 2016. It is a single-filament halogen bulb rated at 12V and 65W, fitted with a PGJ19-5 base, and carries ECE approval with additional recognition in the United States.
• The H7 bulb serves as the low beam source in all halogen headlamp configurations across the full 2006-2016 range covered by these specifications. Rated at 12V and 55W with a PX26d base, it holds ECE approval and is also recognized in the United States and Japan.
• Three distinct HID bulb types appear across the Cayman's high beam positions depending on the model year. The H11 was used in HID-equipped high beams for 2006-2008, the D2S replaced it for 2009-2012, and the H7 took over that role for 2014-2016. These types are not interchangeable, as they differ in base design, operating voltage, and ignition method.
• The low beam HID configurations similarly changed across production years. The D1S was specified for 2006-2008, the D2S for 2009-2012, and the D3S for 2014-2016. Each uses a different base and ignition arrangement, making cross-year substitution incompatible without housing modifications.
• The D2S and D1S are both rated at 85V and 35W, but they differ in base type and ignition design. The D2S uses a P32d-2 base and requires a separate external ignitor, while the D1S uses a PK32d-2 base with an integral ignitor built into the bulb itself. Despite their similar electrical ratings, they are not interchangeable.
• The D3S, used in the low beam HID position on the 2014-2016 Porsche Cayman, is a mercury-free formulation operating at 42V and 35W. It incorporates an integral ignitor and uses a PK32d-5 base, distinguishing it from both the D1S and D2S used in earlier model years.
• The H11, specified as the high beam bulb in HID-equipped 2006-2008 models, is a single-filament halogen type rated at 12V and 55W with a PGJ19-2 base. Although it shares the same wattage as the H7, its base design differs, and the two types are not interchangeable.
• All six bulb types listed in these specifications carry ECE certification, meaning they conform to the regulatory standard used across Europe and in numerous other markets worldwide. The halogen types, H7, H9, and H11, also carry approval for use in the United States, while the HID types, D1S, D2S, and D3S, are governed by ECE standards without separate US-specific designations noted in the specifications.