The passenger compartment of the DS 7 Crossback remained stable in the frontal offset test.  Dummy numbers indicated good protection of the knees and femurs of the driver and passenger.  DS demonstrated that a similar level of protection would be provided to occupants of different sizes and to those sat in different positions.  In the full-width rigid barrier test, protection of the driver and rear passenger was good or adequate for all critical areas of the body.  In the side barrier test, protection was good and the DS 7 Crossback scored maximum points in this test.  However, in the more severe side pole test, protection of the chest was rated as weak, based on dummy readings of rib compression.  Tests on the front seats and head restraints demonstrated good protection against whiplash injuries in the event of a rear-end collision.  A geometric assessment of the rear seats also indicated good whiplash protection.  The DS 7 Crossback has an autonomous emergency braking system as standard.  In tests of its functionality and the low speeds, typical of city driving, at which many whiplash injuries are caused the system showed good performance with collisions avoided or mitigated at all test speeds.

The DS 7 Crossback scored maximum points for its protection of 6 year and 10 year children in Euro NCAP's tests.  Protection of all critical body areas was good in both the frontal offset and side barrier tests.  The front passenger airbag can be disabled to allow a rearward-facing restraint to be used in that seating position.  Clear information is provided to the driver regarding the status of the airbag and the system was rewarded.  All of the restraint types for which the DS 7 Crossback is designed could be properly installed and accommodated in the car.

The protection provided by the bonnet to the head of a struck pedestrian was predominantly good or adequate.  Poor results were recorded along the base of the windscreen and on the stiff windscreen pillars.  The bumper scored maximum points in tests of the protection offered to pedestrians' legs, with good results at all locations.  Similarly, the protection provided to the pelvis area was also good.  The autonomous emergency braking system can detect pedestrians as well as other vehicles and performed well in tests of this functionality, with collisions avoided or mitigated in most scenarios and test speeds.

Tests of the autonomous emergency braking system at highway speeds demonstrated good performance.  The speed assistance system uses a camera to recognise the local speed limit and allows the driver to easily set the limiter appropriately.  The lane assistance system warns the driver when the car is drifting out lane.  A seatbelt reminder system is also standard and covers the front and rear seats.