The Porsche Macan high beam headlight uses H15 or H7 bulb sizes, while low beam headlight applications require D3S or H7 bulb sizes depending on configuration. The replacement chart covers 2015 through 2018 production years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
ECE standard (Europe & worldwide). Mercury-free HID (xenon) discharge bulb with PK32d-5 base and integral ignitor, for projector-type housings. 42V, 35W.
The H15 is a dual-filament halogen bulb operating at 12V with a 55W main filament and a 15W secondary filament, fitted with a PGJ23t-1 base. In the Porsche Macan, it serves as the high beam bulb exclusively in HID-equipped headlamp assemblies for the 2015-2018 model years, where the secondary filament typically handles a daytime running or parking light function.
The H7 is a single-filament halogen bulb rated at 12V and 55W, using a PX26d base. It is an ECE-standard bulb also approved for use in the United States and Japan. In the Porsche Macan (2015-2016), it fills both the high beam and low beam positions in vehicles fitted with halogen capsule headlamps.
The D3S is a mercury-free HID xenon discharge bulb rated at 42V and 35W, using a PK32d-5 base with an integral ignitor. Its higher operating voltage relative to the 12V halogen types reflects the nature of gas-discharge technology, which requires a high-voltage arc to produce light. The D3S serves as the low beam bulb in HID-equipped Macan assemblies across the 2015-2018 model years.
The D3S is specified for projector-type housings. This is a functional requirement, as the optical design of a projector housing is necessary to correctly focus and distribute the intense output of a xenon discharge source. Substituting a D3S into a reflector housing would produce improper beam patterns.
The Porsche Macan carries two distinct headlamp configurations across the 2015-2018 model years: a halogen capsule system and an HID system. These configurations are not interchangeable, as each uses a different set of bulb types with different base fittings, voltages, and operating technologies.
In HID-equipped Macan assemblies, the low beam and high beam functions are handled by two different bulb types from two different technology families. The D3S xenon bulb manages low beam output, while the H15 halogen bulb manages high beam output within the same headlamp unit.
All three bulb types listed in the specifications conform to ECE standards, which govern lighting equipment across Europe and much of the world. The H7 additionally carries approval for the US and Japanese markets, reflecting its broader regulatory acceptance compared to the H15 and D3S.
Because the HID and halogen configurations use entirely different base types, a D3S with its PK32d-5 base cannot be fitted into a socket designed for an H7 with its PX26d base, and vice versa. Physical incompatibility between bases prevents cross-installation between the two headlamp systems.