Volvo VHD front turn signal bulbs utilize 1157NA, 3357NA, or 1034NA sizes, while rear turn signal bulbs use 1157 size specifications. The replacement chart covers vehicle production spanning 2001 through 2017 with corresponding bulb size data.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Volvo VHD front turn signal draws from three distinct bulb types across its model years: the 1157NA, 3357NA, and 1034NA, all of which carry the NA suffix denoting natural amber glass rather than a clear envelope with an amber-coated housing.
The 1157NA and 1034NA are both dual-filament bulbs sharing the BAY15d bayonet base and a 12V, 21W/5W power rating. The 1034NA is classified as a variant of the 1157, meaning the two are closely related in construction and electrical characteristics.
The 3357NA differs from the other front turn signal bulbs in a fundamental way: it is a single-filament wedge-base bulb in a T25 form factor operating at 27W, making it electrically and physically incompatible with the BAY15d socket used by the 1157NA and 1034NA.
Because the 3357NA uses a wedge base while the 1157NA and 1034NA use a bayonet base, the front turn signal socket type on the Volvo VHD varies by model year, and a bulb from one base family cannot be substituted into a socket designed for the other.
The Volvo VHD front turn signal for 2015-2017 uses the 1157NA, while 2013-2014 use the 3357NA, representing a socket-type difference between those adjacent year groups that affects direct interchangeability.
The 1034NA appears in the Volvo VHD front turn signal position for 2006-2009, as well as 2003. Although it shares the BAY15d base and 21W/5W rating with the 1157NA, it is a distinct ANSI part number and the two are not always treated as interchangeable in fitment specifications.
The rear turn signal on the Volvo VHD uses the 1157 across all listed model years from 2001-2017. Unlike the front position, the rear position shows no variation in bulb type across the entire span of the specifications.
The 1157 used in the rear position is a clear-envelope bulb, whereas the front turn signal bulbs are all NA-suffix types with natural amber glass. This distinction means the amber color in the front signal is produced by the bulb itself, while the rear signal relies on the lens or housing for any amber appearance.
The 1157 and 1157NA share the same BAY15d base and 12V, 21W/5W electrical ratings. The sole difference is the glass color, which means the physical fitment is the same but the optical output differs between the two.
The front turn signal of the Volvo VHD does not follow a consistent bulb type across its model year range, with the 1157NA, 3357NA, and 1034NA each appearing in non-consecutive years, making year-specific verification necessary before selecting a replacement bulb for that position.