CITROËN C4 Handbook page 248

In the event of a breakdown
Taking out the standard wheel
F Unscrew the yellow central bolt.
F Raise the spare wheel towards you from
the rear.
F Take the wheel out of the boot.
246
Putting the standard wheel back
in place
F Put the wheel back in its housing.
F Unscrew the yellow central bolt by a few
turns then put it in place in the centre of the
wheel.
F Tighten fully until the central bolt clicks to
retain the wheel correctly.
F Put the box back in place in the centre of
the wheel and clip it.
Tyre under-inflation detection
The spare wheel is not fitted with a
sensor. The punctured wheel must be
repaired by a CITROËN dealer or a
qualified workshop.