Ford C-Max high beam headlight bulbs use H1 size while low beam headlight bulbs use H11 size. The replacement chart covers 2013 to 2018 vehicle 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 Ford C-Max uses the H1 bulb for high beam headlights across all model years from 2013-2018. The H1 is a single-filament halogen bulb operating at 12V and 55W, fitted with a P14.5s base and produced under the ECE standard, which governs lighting equipment across Europe and much of the world. It also carries approval for use in the United States and Japan.
The low beam headlight position on the Ford C-Max calls for the H11 bulb across the same 2013-2018 span. Like the H1, the H11 is a single-filament halogen bulb rated at 12V and 55W and manufactured to the ECE standard, with additional approval for the US market. Its base type is PGJ19-2, which differs from the P14.5s base of the H1.
Although both the H1 and H11 share identical voltage and wattage ratings of 12V and 55W, their base types are physically distinct and incompatible with each other. The P14.5s base of the H1 and the PGJ19-2 base of the H11 are not interchangeable, meaning each bulb fits only its designated socket position.
Both bulb types are single-filament designs, meaning each serves only one lighting function. This is why the C-Max requires separate bulbs for high beam and low beam operation rather than a dual-filament alternative such as the H4.