BMW 540i Turn Signal Bulb Size
The BMW 540i uses multiple turn signal bulb sizes across front and rear positions, including 3157 for the front inner, 12961 for the front outer, 12496 and PY21W for front applications, and PY21W or P21W for rear locations. The replacement chart covers 1994 through 2020 model years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
Front Inner Turn Signal
| Years | US Type | EU Type | Shop |
|---|---|---|---|
| 1997-2000 | 3157 | P27/7W | Check Price |
Front Outer Turn Signal
| Years | Bulb Type | Shop |
|---|---|---|
| 1997-2000 | 12961 | Check Price |
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 |
|---|---|---|---|
| 2020 | 12496 (Without Adaptive Lighting) | 12496 | Check Price |
| 2019 | 12496 (Without Adaptive Headlamps) | 12496 | Check Price |
| 2017-2018 | 7507 (Without Adaptive Lighting) | PY21W | Check Price |
| 2001-2003 | 3457NA | PY27/7W | Check Price |
| 1999-2000 | 3157 (Front) | P27/7W | Check Price |
| 12961 (Side) | 12961 | Check Price | |
| 1998 | 3157 | P27/7W | Check Price |
| 12961 (Side) | 12961 | Check Price | |
| 1997 | 3357NA (Front) | 3357NA | Check Price |
| 12961 (Side) | 12961 | Check Price | |
| 1994-1995 | 1157 | P21/5W | Check Price |
Rear Turn Signal
| Years | US Type | EU Type | Shop |
|---|---|---|---|
| 2002-2003 | 7507 | PY21W | Check Price |
| 1997-2001 | 1156 | P21W | Check Price |
| 1994-1995 | 1156 | P21W | Check Price |
Bulb Specifications
| Description | Type | Shop |
|---|---|---|
| ANSI standard (US & Canada). Dual-filament wedge bulb (T25). 12V, 27W/7W. | 3157 | Check Price |
| Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W. | 12961 | Check Price |
| Philips/Osram part number. Halogen bulb, specialty application. 12V. | 12496 | Check Price |
| ECE standard (Europe & worldwide). Single-filament amber bulb with BAU15s bayonet base. 12V, 21W. | PY21W | Check Price |
| ANSI standard (US & Canada). Dual-filament wedge bulb (T25), natural amber glass. 12V, 27W/7W. | 3457NA | Check Price |
| ANSI standard (US & Canada). Single-filament wedge bulb (T25), natural amber glass. 12V, 27W. | 3357NA | Check Price |
| ECE standard (Europe & worldwide). Dual-filament signalling bulb with BAY15d bayonet base. 12V, 21W/5W. | P21/5W | Check Price |
| ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V, 21W/5W. | 1157 | Check Price |
| ECE standard (Europe & worldwide). Single-filament signalling bulb with BA15s bayonet base. 12V, 21W. | P21W | Check Price |
| ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W. | 1156 | Check Price |