Alfa Romeo 166 – bulb specifications
Type of bulbs
A – All-glass bulbs Are pressure-fixed. Pull to remove
B – Bayonet bulbs Push in the bulb and turn counterclockwise to remove this type of bulb from the fixture.
C – Tubular bulbs Release them from the contacts to remove them
D – Halogen bulbs To remove, remove them from the clip in the socket
| Bulbs | Post | Type | Power |
| LOW BEAM / HIGH BEAM (HEADLIGHTS ON GAS OUTLET) | re | D1 | 35W |
| HIGH BEAM BEACON (GAS OUTLET HEADLIGHTS) | re | H1 | 55W |
| LOW BEAM (HALOGEN HEADLIGHTS) | re | H7 | 55W |
| DRIVING LIGHTS (HALOGEN HEADLIGHTS) | re | H7 | 55W |
| FRONT SIDE LIGHT | b | H6W | 6W |
| FOG LIGHTS | re | H3 | 55W |
| FRONT DIRECTION INDICATORS (COLORED BULB) | b | PY21W | 21W |
| SIDE DIRECTION INDICATORS | FOR | Amber 5W | 5W |
| REAR DIRECTION INDICATOR | – | Lead | – |
| STOP / SIDE LIGHT | b | 21 / 5W | 21W / 5W. |
| REVERSING LIGHT | b | P21W | 21W |
| REAR FOG GUARD | b | P21W | 21W |
| ADDITIONAL STOP LIGHT (3RD STOP) | FOR | W2.3W | 2,3W |
| REAR SIDE LAMPS (ON THE TRUNK LID) | b | R5W | 5W |
| FRONT ROOF LIGHTS | b | 10 W halogen bulb. | 10W |
| TRUNK LIGHT | to | 10W | 10W |
| GLOVE BOX AND DOOR LIGHTS | FOR | W5W | 5W |
| SUN LAMP | to | C5W | 5 |
| LICENSE PLATE LIGHT | FOR | W5W | 5 |
| REAR ROOF LAMPS | b | Halogen HT5W | 5W |