The BMW M235i uses D1S and H15 bulbs for high beam headlight functions, while low beam headlight applications require D1S and H7 bulb sizes. The replacement chart covers 2014 to 2016 model 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.
The BMW M235i (2014-2016) uses two distinct headlamp system types across all model years: HID (High-Intensity Discharge) and halogen capsule. The specific bulb sizes required depend entirely on which headlamp system is fitted to the vehicle.
The D1S is an HID xenon discharge bulb operating at 85V and 35W. It features a PK32d-2 base with an integral ignitor built into the bulb body, and it is designed exclusively for projector-type housings. It conforms to ECE standards applicable in Europe and worldwide.
On the BMW M235i equipped with HID headlamps, the D1S bulb serves both the high beam and low beam positions across all three model years covered in the specifications.
The H15 is a dual-filament halogen bulb rated at 12V with a 55W/15W output, using a PGJ23t-1 base. The two filaments correspond to separate functions within a single bulb, which is why it appears in the high beam position on halogen-equipped M235i vehicles rather than a single-filament type.
The H7 is a single-filament halogen bulb rated at 12V and 55W, fitted with a PX26d base. Unlike the D1S and H15, the H7 carries approval not only under ECE standards but also in the United States and Japan, giving it broader regulatory acceptance.
On halogen-equipped M235i vehicles, the high beam and low beam positions use different bulb types: the H15 for high beam and the H7 for low beam. These two bulbs are not interchangeable, as they differ in filament count, base type, and wattage.
The D1S integral ignitor design means the ignitor is not a separate replaceable component, distinguishing it from some other HID systems where the ignitor is housed externally in the ballast assembly.
All three bulb types specified for the M235i conform to ECE standards, indicating they are designed and tested to European regulatory requirements for photometric performance and safety.