Fiat Brava front side marker bulbs use 194 or 57 size, while rear side marker bulbs use 194 or 257 size. The replacement chart covers 1978 through 1981 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 194 bulb is the most frequently specified size across the Fiat Brava side marker positions, appearing in both front and rear locations for the 1978, 1979, and 1981 model years.
The 194 is an ANSI-standard miniature wedge bulb with a T10 base, rated at 12V and 3.78W, making it a common low-wattage lighting component in automotive applications of this era.
The 1980 Fiat Brava front side marker takes a size 57 bulb, which differs from the 194 used in the surrounding model years for that same position.
The 57 bulb uses a BA9s base rather than a wedge-style fitting, operates at 12V, and draws only 1W, placing it among the lowest-wattage bulbs in these specifications.
The 1980 rear side marker position calls for a size 257, which also uses a BA9s base or festoon configuration and is rated at 12V and 2W.
Because the 57 and 257 both reference a BA9s base, they share a physical socket type, though their wattage ratings differ and they are not interchangeable without confirming the correct output for each position.
The front and rear side marker positions on the Fiat Brava use matching bulb sizes for the 1978, 1979, and 1981 model years, with both positions requiring the 194 in those years.
The 1980 model year is the only year in these specifications where the front and rear side marker positions require different bulb sizes from each other, with the 57 at the front and the 257 at the rear.
The 194 wedge bulb and the 57 or 257 BA9s-base bulbs are physically incompatible due to their different base types, so substitution between these groups is not possible without a socket adapter.