Dodge Omni front and rear turn signal bulbs utilize 1157 and 1156 sizes, with the front position requiring the 1157 bulb size exclusively. The replacement chart covers vehicle production spanning 1978 to 1990, detailing bulb specifications across the model's manufacturing years.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Dodge Omni uses the 1157 bulb for the front turn signal across all model years covered in the specifications, spanning 1978-1990.
The 1157 is a dual-filament bulb operating at 12 volts with a 21W/5W output and a BAY15d bayonet base, conforming to ANSI standards recognized in both the United States and Canada.
The dual-filament design of the 1157 allows it to serve two lighting functions within a single housing, which is why it appears in positions where both a running light and a turn signal share the same lamp.
The rear turn signal on the Dodge Omni transitioned from the 1156 bulb to the 1157 bulb between the 1980 and 1981 model years.
The 1156 is a single-filament bulb rated at 12 volts and 21W, fitted with a BA15s bayonet base, and also conforms to ANSI standards for the US and Canadian markets.
Although the 1156 and 1157 share a similar physical profile and both use a 15mm bayonet base, their base configurations differ. The BA15s base of the 1156 has a single locating pin, while the BAY15d base of the 1157 has two offset pins, making the two bulbs non-interchangeable without modification.
For the 1981-1990 Dodge Omni, the front and rear turn signals both use the 1157, meaning a single bulb type covers both positions during those years.
For the 1978-1980 Dodge Omni, the front turn signal uses the 1157 while the rear uses the 1156, requiring two distinct bulb types to service all turn signal positions.