Chevrolet Beretta Turn Signal Bulb Size

The Chevrolet Beretta uses a 2057NA bulb size for the front turn signal and a 2057 bulb size for the rear turn signal. The replacement chart covers vehicle production years from 1987 to 1994 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.

Front Turn Signal

If US Type and EU Type show the same value, a direct cross-reference for this bulb is not available or the data is insufficient.

Years	US Type	EU Type	Shop
1990-1994	2057NA	P21/5W	Check Price
1987-1989	2057	2057	Check Price

Rear Turn Signal

Years	Bulb Type	Shop
1987-1994	2057	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base, natural amber glass. Brighter variant of 1157. 12V, 26.9W/8W.	2057NA	Check Price
ECE standard (Europe & worldwide). Dual-filament signalling bulb with BAY15d bayonet base. 12V, 21W/5W.	P21/5W	Check Price
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. Brighter variant of 1157. 12V, 26.9W/8W.	2057	Check Price

Other Locations

Additional Notes

The 2057 and 2057NA are the two bulb types specified across all front and rear turn signal positions on the Chevrolet Beretta for the 1987-1994 model years.
Both the 2057 and 2057NA are ANSI-standardized dual-filament bulbs rated at 12V with a wattage draw of 26.9W on the high filament and 8W on the low filament, sharing a BAY15d bayonet base.
The BAY15d base is an offset twin-contact bayonet fitting, which physically prevents incorrect single-filament bulbs from being seated in the socket.
Both bulb types are described as brighter variants of the 1157, meaning they produce higher light output while retaining the same base configuration and general form factor as the 1157.
The 2057NA differs from the standard 2057 solely in its natural amber glass envelope, which produces an amber-colored output without requiring an amber-tinted lens or housing.
The Chevrolet Beretta uses the 2057NA in the front turn signal position for the 1990-1994 model years, while the 1987-1989 model years use the clear-glass 2057 in that same position.
The rear turn signal position uses the standard 2057 across all model years from 1987-1994, with no amber-glass variant specified for that location.
Because the 2057 and 2057NA share the same BAY15d base and electrical ratings, one will physically fit where the other is specified, though substituting a clear 2057 for a 2057NA in the front position would alter the color output of the turn signal.