The INFINITI M45 high beam headlight uses a 9005 bulb size, while low beam headlight applications utilize D2S, H1, or D2R bulb sizes depending on configuration. The replacement chart covers 2003 through 2010 model 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.
The 9005 bulb appears across all listed model years of the Infiniti M45 as the high beam headlight bulb. It is an ANSI-standard single-filament halogen bulb rated at 12V and 65W, fitted with a P20d base, and recognized under US and Canadian standards.
The low beam headlight position on the Infiniti M45 is not served by a single bulb type across all years. Three distinct bulb types are specified depending on the model year and headlamp system installed: D2S, D2R, and H1.
D2S and D2R are both HID (xenon) discharge bulbs operating at 85V and 35W, each requiring an external ignitor to function. Despite sharing the same wattage and voltage rating, they are not interchangeable. The D2S carries a P32d-2 base and is designed for projector-type housings, while the D2R carries a P32d-3 base and is designed for reflector-type housings.
The 2003-2004 model years specify the D2R bulb for the low beam position, indicating those vehicles used reflector-type HID headlamp housings.
For the 2009-2010 model years, the low beam position specifies the D2S bulb exclusively, indicating projector-type HID housings were standard in those years.
The 2006-2008 model years present a split specification for the low beam position. Vehicles equipped with HID headlamps use the D2S bulb, while those equipped with halogen capsule headlamps use the H1 bulb, reflecting two distinct factory headlamp configurations available during that period.
The H1 bulb is a single-filament halogen type rated at 12V and 55W, fitted with a P14.5s base. It holds ECE standard recognition and is also approved for use in the US and Japan.
Because the D2S and D2R bulbs share identical voltage and wattage ratings but differ in base type and housing compatibility, substituting one for the other would result in an improper fit and incorrect light output for the housing design.