Fiat Brava front turn signal bulbs measure 1157 in size, while rear turn signal bulbs measure P21W or 1141, with each bulb size corresponding to specific vehicle applications. The replacement chart covers 1978 through 1981 production years and details bulb size specifications for turn signal applications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 1157 bulb is the sole front turn signal type across all listed Fiat Brava model years, covering 1978-1981.
The 1157 is a dual-filament bulb rated at 12V with a 21W main filament and a 5W secondary filament, mounted on a BAY15d bayonet base, and produced to the ANSI standard used in the United States and Canada.
The dual-filament design of the 1157 allows a single bulb to serve two lighting functions simultaneously, which is why it is commonly used in positions requiring both turn signal and parking light operation.
The rear turn signal of the Fiat Brava uses two distinct bulb types across the listed years: the P21W for 1978-1979 and 1981, and the 1141 for 1980.
The P21W is a single-filament bulb rated at 12V and 21W, produced to the ECE standard used in Europe and internationally, and fitted with a BA15s bayonet base.
The 1141 is also a single-filament bulb rated at 12V and 21W with a BA15s bayonet base, but it is produced to the ANSI standard rather than the ECE standard.
Because the P21W and the 1141 share the same BA15s base and identical wattage rating, they are physically and electrically similar, though they originate from different regional standards bodies.
The 1157 uses a BAY15d base, which is a double-contact bayonet fitting, while the P21W and 1141 both use the BA15s base, a single-contact bayonet fitting. These two base types are not interchangeable.
The front and rear turn signal positions on the Fiat Brava require different bulb types in all listed years, as the front position consistently uses the dual-filament 1157 while the rear position uses single-filament bulbs.