The Kia Rio parking light utilizes 2357NA and 168 bulb sizes for the specific lighting components located on the front and rear of the vehicle. Available data covers the period from 2001 through 2020 for the various configurations listed in the provided chart.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 2357NA is the most frequently specified front parking light bulb for the Kia Rio, appearing across the 2001-2002, 2010-2011, 2020, and 2023 model years.
The 2357NA is an ANSI-standard dual-filament bulb rated at 12V with a high-filament draw of 26.9W and a low-filament draw of 8W, fitted with a BAY15d bayonet base and natural amber glass.
The natural amber tint of the 2357NA glass produces the amber color required for parking light applications without relying on a colored lens.
The 2019 Kia Rio front parking light specification splits into two distinct bulb sizes depending on headlamp configuration: the PY21W applies to one variant, while the 2357NA applies to the variant equipped with halogen capsule headlamps.
The same headlamp-dependent split present in the 2019 model year also applies to the 2020 Kia Rio, where the 2357NA is specified specifically for the halogen capsule headlamp configuration.
The PY21W is an ECE-standard single-filament amber bulb rated at 12V and 21W, fitted with a BAU15s bayonet base. The BAU15s base is offset, meaning it is not interchangeable with the BAY15d base used by the 2357NA despite a similar physical appearance.
Because the BAU15s and BAY15d bases are physically distinct, the PY21W and 2357NA cannot be substituted for one another, making headlamp configuration a necessary factor when selecting a replacement bulb for the 2019-2020 Rio.
The 168 bulb is specified for the 2006-2009 Kia Rio front parking light. It is an ANSI-standard miniature wedge bulb in the T10 form factor, rated at 12V and 4.9W, which represents a significantly lower wattage than either the 2357NA or PY21W.
The T10 wedge base of the 168 bulb is a different mounting type from the bayonet bases used by the 2357NA and PY21W, making cross-substitution between these bulb families physically incompatible.
The 2357NA is an ANSI-standard bulb, while the PY21W follows the ECE standard used in European and international markets, reflecting a regulatory distinction that influences which bulb is fitted to a given Rio variant.