The Volvo 240 front turn signal requires either 1157NA or 1034NA bulb sizes, while the rear turn signal uses a P21W bulb size. The replacement chart covers 1990 to 1993 model years with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Volvo 240's rear turn signal uses the P21W bulb across all four model years covered, from 1990-1993. The P21W is an ECE-standard single-filament bulb rated at 12V and 21W, fitted with a BA15s bayonet base.
The BA15s base on the P21W is a single-contact bayonet fitting, which is distinct from the dual-contact BAY15d base found on the front turn signal bulbs. These two base types are not interchangeable.
The front turn signal specification for the Volvo 240 changed between the 1992 and 1993 model years. The 1034NA was used from 1990-1992, while the 1157NA replaced it for 1993.
Both the 1034NA and 1157NA are ANSI-standard dual-filament bulbs with a BAY15d bayonet base and natural amber glass, rated at 12V with a 21W/5W filament configuration. The 1034NA is classified as a variant of the 1157.
The natural amber glass on the 1034NA and 1157NA produces an amber signal output directly from the bulb, without relying on a colored lens to achieve the required turn signal color.
The dual-filament design of the front turn signal bulbs means a single bulb serves two functions, with the higher 21W filament typically handling the turn signal and the lower 5W filament serving a secondary role such as parking or running light.
The P21W used at the rear is a single-filament bulb, meaning it is dedicated solely to one lighting function, unlike the dual-filament front bulbs.
The front and rear turn signal bulbs on the 240 follow different international standards. The front positions use ANSI-standard bulbs common to the US and Canadian markets, while the rear uses an ECE-standard bulb associated with European and worldwide specifications.