Volkswagen Golf R Turn Signal Bulb Size

The Volkswagen Golf R turn signal requires a 7440NA bulb size for the specific lighting component located on the exterior of the vehicle. Data for the bulb specifications covers the range from 2018 through 2018.

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
2023-2024	12174NA	12174NA	Check Price
2019	7440NA (With Halogen Capsule Headlamps)	WY21W	Check Price
2018	H21W (With HID Headlamps)	H21W	Check Price
2018	7440NA (With Halogen Capsule Headlamps)	WY21W	Check Price
2015-2017	H21W (With HID Headlamps)	H21W	Check Price
2015-2017	12174NA (With Halogen Capsule Headlamps)	12174NA	Check Price
2012-2013	12180	12180	Check Price

Rear Turn Signal

Years	US Type	EU Type	Shop
2015-2018	7440	W21W	Check Price
2012-2013	7440NA	WY21W	Check Price

Bulb Specifications

Description	Type	Shop
OEM part number. Natural amber glass variant. 12V.	12174NA	Check Price
ANSI standard (US & Canada). Single-filament wedge bulb (T20), natural amber glass. 12V, 21W.	7440NA	Check Price
ECE standard (Europe & worldwide). Single-filament signalling bulb with BAY9s base. 12V, 21W.	H21W	Check Price
Philips part number. Halogen bulb, specialty application. 12V.	12180	Check Price
ANSI standard (US & Canada). Single-filament wedge bulb (T20). 12V, 21W.	7440	Check Price

Other Locations

Additional Notes

The 12174NA is an OEM-designated part number for a natural amber glass bulb rated at 12V. It serves as the front turn signal across the Volkswagen Golf R for the 2015-2017 and 2023-2024 model years when halogen capsule headlamps are fitted, making it the most frequently specified front turn signal bulb in these listings.
The 7440NA and 7440 are both ANSI-standard single-filament wedge bulbs using the T20 form factor, rated at 12V and 21W. The 7440NA carries a natural amber glass coating, while the 7440 does not. These two variants are not interchangeable in applications where amber coloring is required by the lamp housing design, as the amber tint is built into the glass of the NA variant rather than the housing itself.
The H21W uses a BAY9s bayonet base and follows the ECE standard, which governs lighting regulations in Europe and many international markets. Rated at 12V and 21W, it is specified for the front turn signal on the Volkswagen Golf R (2015-2017) equipped with HID headlamps, and it is not physically interchangeable with the T20 wedge-base 7440NA despite sharing the same wattage rating.
For the 2018-2019 Golf R with halogen capsule headlamps, the front turn signal uses the 7440NA rather than the 12174NA found on surrounding model years, indicating a fitment distinction that makes direct substitution between these two part numbers inadvisable without confirming the specific model year.
The 2015-2017 Golf R front turn signal position carries two distinct bulb specifications depending on headlamp type. Vehicles with halogen capsule headlamps use either the 12174NA or 7440NA, while vehicles with HID headlamps require the H21W with its BAY9s base, representing an incompatible socket configuration relative to the wedge-base alternatives.
The 12180 is a Philips part number designating a 12V halogen bulb for a specialty application. It is listed as the front turn signal bulb for the 2012-2013 Golf R, and its classification as a specialty bulb suggests it does not share a common ANSI or ECE designation with the other bulbs in these specifications.
The rear turn signal for the 2015-2018 Golf R uses the standard 7440, while the 2012-2013 Golf R uses the 7440NA. Both are T20 single-filament wedge bulbs at 12V and 21W, but the amber glass coating present on the 7440NA indicates the earlier model years relied on the bulb itself to produce the amber signal color at the rear position.