The Aston Martin DBS high beam and low beam headlight bulbs utilize H9 and D1S bulb sizes. The replacement chart covers vehicle production years spanning 2008 to 2012 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.
The Aston Martin DBS used two distinct headlight system types across the 2008-2012 model years: halogen capsule headlamps and HID headlamps. Each system required a different bulb for both high and low beam positions, making headlight system identification essential before any bulb replacement.
The H9 is a single-filament halogen bulb rated at 12V and 65W, built to ECE standards for use in Europe and worldwide markets, and also approved for use in the United States. It uses a PGJ19-5 base, which is a push-and-twist locking mount specific to the H9 type and not shared with other common halogen sizes such as H7 or H11.
The D1S is a high-intensity discharge xenon bulb rated at 85V and 35W, also built to ECE standards. It incorporates an integral ignitor within the bulb body and uses a PK32d-2 base. The D1S is designed exclusively for projector-type housings and is not interchangeable with reflector-style headlamp assemblies.
Because the D1S includes a built-in ignitor, it differs from D2S and D3S bulbs, which require a separate external ignitor. Substituting a different D-series bulb type in the Aston Martin DBS HID system would result in an incompatible electrical and mechanical fit.
The H9 and D1S bulbs share no physical or electrical compatibility with each other. The halogen H9 operates on a standard 12V vehicle circuit, while the D1S requires the high-voltage output of a dedicated HID ballast, meaning the two headlamp systems are entirely separate in their electrical architecture.
Both the H9 and D1S specifications applied uniformly to both the high beam and low beam positions across all five model years covered. This indicates the DBS used a single bulb per function in each headlamp system rather than a dual-filament arrangement.
The H9 bulb, while sharing the same general halogen family as bulbs like the H1 or H7, uses a distinct PGJ19-5 base that physically prevents installation of other halogen types. Cross-fitting an H11 or similar bulb, which uses a different base, is not possible without modification.
The D1S bulb's 35W power rating is notably lower than the 65W rating of the H9, yet HID systems generally produce greater luminous output due to the higher efficiency of gas-discharge technology compared to halogen filament technology.