2007 Alfa Romeo 166 Owner handbook (in English)

168
To replace the bulb (Type D – D1,
35W):
– Remove the engine compartment cov-
er after turning the fastening pins.
– Remove the rubber cap (A-fig. 26)
by pulling the tab (B).– Release the clip (C- fig. 27).
– Remove the bulb (D- fig. 28) and
disconnect the snap-fitted connector (E).– Fit connector to new bulb.
– Fit the bulb in the headlight reflector
making the notch coincide with the corre-
sponding groove.
– Lock the bulb with the clip.
– Fit the rubber cap.
– Refit the engine compartment cover
and fasten turning the fastening pins. Xenon bulbs may only
be touched on the metal
part. If the glass bulb is
touched by the fingers, clean it
carefully with a clean cloth
moistened with methylated spirit
and allow to dry before refitting
the bulb.
Any work on the front
light units should be car-
ried out with the light switch at
position 0 (lights off) and with the
ignition key removed from the
switch: danger of electric dis-
charge.
WARNING
A0D0056m
fig. 26
A0D0057m
fig. 27
A0D0058m
fig. 28

169
High beam headlamp signaller
To replace the bulb (Type D – H1,
55W):
– Remove the engine compartment cov-
er after turning the fastening pins.
– Turn counter-clockwise and remove
the direction indicator bulb holder (A-
fig. 29), without disconnecting the con-
nector to widen the working space.
– Remove the rubber cap (B) by
pulling the tab (C).– Disconnect the snap-fitted connector
(D- fig. 30) and release clip (E).
– Remove the bulb (F- fig. 31).– Fit new bulb in the headlight reflector
making the notches coincide with the cor-
responding grooves.
– Lock the bulb with the clip.
– Fit the connector to the bulb.
– Fit the rubber cap.
– Fit the direction indicator bulb holder
and lock it by turning it clockwise.
– Refit the engine compartment cover
and secure it by turning the fastening
pins.
A0D0059m
fig. 29
A0D0060m
fig. 30
A0D0061m
fig. 31

170
Front sidelights
To replace the bulb (Type B – H6W,
6W):
– Remove the engine compartment cov-
er after turning the fastening pins.
– Turn counter-clockwise and remove
the direction indicator bulb holder (A-
fig. 32) without disconnecting the con-
nector to widen the working space.
– Remove the rubber cap (B) by
pulling the tab (C).– Press the two retaining tabs and re-
move the bulb holder (D- fig. 33).
– Remove the bulb (E- fig. 34) from
the bulb holder, pushing it slightly and
turning it counter-clockwise.– Fit the new bulb into the bulb holder,
pushing it slightly and turning it clock-
wise.
– Push the bulb holder down in its seat.
– Fit the rubber cap.
– Fit the direction indicator bulb holder
and lock it by turning it clockwise.
– Refit the engine compartment cover
and secure it by turning the fastening
pins.
A0D0059m
fig. 32
A0D0062m
fig. 33
A0D0063m
fig. 34

171
Front direction indicators
To replace the bulb (Type B – PY21W,
21W, coloured):
– Remove the engine compartment cov-
er after turning the fastening pins.
– Turn counter-clockwise and remove
the bulb holder (A- fig. 35) without
disconnecting the connector.
– Remove the bulb (B- fig. 36) from
the bulb holder, pushing it slightly and
turning it counter-clockwise.– Fit the new bulb into the bulb holder,
pushing it slightly and turning it clock-
wise.
– Fit the bulb holder and lock it by turn-
ing it clockwise.
– Refit the engine compartment cover
and secure it by turning the fastening
pins.FRONT LIGHT UNITS –
HALOGEN BULB HEADLIGHTS
(optional for versions/markets where
applicable)
The front light units with halogen bulb
headlights contain low beam, high beam,
sidelight and direction indicator bulbs.
The bulbs are arranged inside the light
unit as follows (fig. 37-38):
A.Direction indicator
B.High beam headlight and sidelight
C.Low beam headlight.
A0D0070m
fig. 35
A0D0071m
fig. 36
A0D0054m
fig. 37

172
Low beam headlights
To replace the bulb (Type D – H7,
55W):
– Remove the engine compartment cov-
er after turning the fastening pins.
– Remove the rubber cap (A- fig.
39) by pulling the tab (B).
– Disconnect the snap-fitted connector
(C- fig. 40).
–- Release the clip (D).
– Remove the bulb (E- fig. 41).– Fit the bulb in the headlight reflector
making the notch coincide with the corre-
sponding groove.
– Lock the bulb with the clip.
– Fit the connector to the new bulb.
– Fit the rubber cap.– Refit the engine compartment cover
and secure it by turning the fastening
pins.
A0D0036m
fig. 38
A0D0072m
fig. 39
A0D0074m
fig. 41
A0D0073m
fig. 40

173
High beam headlights
To replace the bulb (Type D – H7,
55W):
– Remove the engine compartment cov-
er after turning the fastening pins.
– Turn counter-clockwise and remove
the direction indicator bulb holder (A-
fig. 42) without disconnecting the con-
nector to widen the working space.
– Remove the rubber cap (B) by
pulling the tab (C).– Disconnect the snap-fitted connector
(D- fig. 43) and release the clip (E).
– Remove the bulb (F- fig. 44).– Fit the new bulb in the headlight re-
flector making the notches coincide with
the corresponding grooves.
– Lock the bulb with the clip.
– Fit the connector to the bulb.
– Fit the rubber cap.
– Fit the direction indicator bulb holder
and lock it by turning it clockwise.
– Refit the engine compartment cover
and secure it by turning the fastening
pins.
A0D0075m
fig. 42
A0D0076m
fig. 43
A0D0077m
fig. 44

174
Front sidelights
To replace the bulb (Type B – H6W,
6W):
– Remove the engine compartment cov-
er after turning the fastening pins.
– Turn counter-clockwise and remove
the direction indicator bulb holder (A-
fig. 45) without disconnecting the con-
nector to widen the working space.
– Remove the rubber cap (B) by pulling
the tab (C).– Press the two retaining tabs and re-
move the bulb holder (D- fig. 46).
– Remove the bulb (E- fig. 47) from
the bulb holder, pushing it slightly and
turning it counter-clockwise.– Fit the new bulb into the bulb holder,
pushing it slightly and turning it clock-
wise.
– Push the bulb holder down in its seat.
– Fit the rubber cap.
– Fit the direction indicator bulb holder
and lock it by turning it clockwise.
– Refit the engine compartment cover
and secure it by turning the fastening
pins.
A0D0075m
fig. 45
A0D0078m
fig. 46
A0D0079m
fig. 47

175
Front direction indicators
To replace the bulb (Type B – PY21W,
21W, coloured):
– Remove the engine compartment cov-
er after turning the fastening pins.
– Turn counter-clockwise and remove
the bulb holder (A- fig. 48), without
disconnecting the connector.
– Remove the bulb (B- fig. 49) from
the bulb holder, pushing it slightly and
turning it counter-clockwise.– Fit the new bulb into the bulb holder,
pushing it slightly and turning it clock-
wise.
– Fit the bulb holder and lock it by turn-
ing it clockwise.
– Refit the engine compartment cover
and secure it by turning the fastening
pins.FRONT FOGLIGHTS
To replace the bulb (Type D - H3, 55W)
proceed under the car as follows:
– Disconnect the connector (A- fig.
50) from the light unit.
– Turn the cover (B) counter-clockwise
and remove it.
– Disconnect the connector (C- fig.
51) from the bulb.
– Release the clip and remove the bulb
(D- fig. 52).
A0D0080m
fig. 48
A0D0081m
fig. 49
A0D0082m
fig. 50