Buick LaCrosse Turn Signal Bulb Size

Buick LaCrosse front and rear turn signal bulb sizes include 3757NA, 7443NA, 4157NA, 7440, and 7440NA options depending on location and model variation. The replacement chart covers 2005 through 2018 production years with corresponding bulb specifications.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Front Left Turn Signal

YearsUS TypeEU TypeShop
2010-20133757NA (For vehicle with High Intensity Discharge Headlights)PY27/7WCheck Price

Front Right Turn Signal

YearsUS TypeEU TypeShop
2012-20133757NA (For vehicle with High Intensity Discharge)PY27/7WCheck Price
20113757NAPY27/7WCheck Price
20103757NA (For vehicle with High Intensity Discharge)PY27/7WCheck Price

Front Turn Signal

YearsUS TypeEU TypeShop
2014-20167443NAWY21/5WCheck Price
2010-20133757NAPY27/7WCheck Price
2005-20094157NAPY27/7WCheck Price

Rear 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.

YearsUS TypeEU TypeShop
2017-20187440W21WCheck Price
2014-20167440NAWY21WCheck Price
2010-20133757NAPY27/7WCheck Price
2005-200930573057Check Price

Bulb Specifications

Description Type Shop
ANSI standard (US & Canada). Dual-filament wedge bulb (T25), natural amber glass. 12V.3757NACheck Price
ANSI standard (US & Canada). Dual-filament wedge bulb (T20), natural amber glass. 12V, 21W/5W.7443NACheck Price
ANSI standard (US & Canada). Dual-filament wedge bulb (T25), natural amber glass. 12V, 27W/7W.4157NACheck Price
ANSI standard (US & Canada). Single-filament wedge bulb (T20). 12V, 21W.7440Check Price
ANSI standard (US & Canada). Single-filament wedge bulb (T20), natural amber glass. 12V, 21W.7440NACheck Price
ANSI standard (US & Canada). Dual-filament wedge bulb (T25). 12V, 27W/7W.3057Check Price

Other Locations