Volkswagen GTI Turn Signal Bulb Size
The Volkswagen GTI turn signal requires bulb size 7440NA or H21W depending on the specific configuration of the lighting assembly. Data for the bulb sizes covers the range from 2015 to 2018.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
Front Turn Signal
| Years | Bulb Size |
|---|---|
| 2023-2024 | 12174NA |
| 2021 | 7440NA |
| 2019 | 7440NA (With Halogen Capsule Headlamps) |
| 2015-2018 | H21W (With HID Headlamps) |
| 12174NA (With Halogen Capsule Headlamps) | |
| 2010-2014 | 12180 |
| 2007-2009 | H21W (With HID Headlamps) |
| 1156NA (With Halogen Capsule Headlamps) | |
| 2006 | H21W (With HID Headlamps) |
| 3457NA (With Halogen Capsule Headlamps) |
Rear Turn Signal
| Years | Bulb Size |
|---|---|
| 2015-2018 | 7440 |
| 2010-2014 | 7440NA |
| 2006-2009 | P21W |
Bulb Specifications
| Description | Bulb Size |
|---|---|
| OEM part number. Natural amber glass variant. 12V. | 12174NA |
| ANSI standard (US & Canada). Single-filament wedge bulb (T20), natural amber glass. 12V, 21W. | 7440NA |
| ECE standard (Europe & worldwide). Single-filament signalling bulb with BAY9s base. 12V, 21W. | H21W |
| Philips part number. Halogen bulb, specialty application. 12V. | 12180 |
| ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base, natural amber glass. 12V, 21W. | 1156NA |
| ANSI standard (US & Canada). Dual-filament wedge bulb (T25), natural amber glass. 12V, 27W/7W. | 3457NA |
| ANSI standard (US & Canada). Single-filament wedge bulb (T20). 12V, 21W. | 7440 |
| ECE standard (Europe & worldwide). Single-filament signalling bulb with BA15s bayonet base. 12V, 21W. | P21W |