The passenger compartment of the Toyota Aygo X remained stable in the frontal offset test.  The driver’s left femur force was slightly elevated and this precluded Toyota from demonstrating how well protected the knees and femurs would be for occupants of different sizes and for those sitting in different positions.  Protection of this body region was rated as marginal, as was that of the driver’s chest, based on dummy readings of compression.  Lower leg protection was weak.  Analysis of the deceleration of the impact trolley during the test, and analysis of the deformable barrier after the test, revealed that the Toyota Aygo X would be a benign impact partner in a frontal collision.  In the full-width rigid barrier test, protection was good or adequate for all critical body regions of the driver rear seat passenger.  In both the side barrier test and the more severe side pole impact, good protection was provided to all critical body areas and the Toyota Aygo X scored maximum points in this part of the assessment.  The car has no countermeasure to mitigate head to head contact between the front seat occupants, so far-side protection was rated as poor.  Tests on the front seats and head restraints demonstrated good protection against whiplash injuries in the event of a rear-end collision.  A geometric analysis of the rear seats also indicated good whiplash protection.  The car has an advanced eCall system which alerts the emergency services in the event of a crash, and a  system to prevent secondary impacts after the car has been in a collision.  Toyota demonstrated that the doors and windows would be openable to allow occupants to escape in the event of vehicle submergence.

In the frontal offset test, protection of the neck of the 10 year dummy was rated as marginal, based on dummy readings of tensile forces.  In the side barrier impact, the head of the 10 year dummy made contact with the car interior leading to high dummy injury values and a rating of poor for the protection provided.  The front passenger airbag can be disabled to allow a rearward-facing child 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.  The Toyota Aygo X is not equipped with 'child presence detection', a system which can alert others if children have been left in the car. All of the child restraint types for which the Toyota Aygo X is designed could be properly installed and accommodated in the car.

Protection of the head of a struck pedestrian or cyclist was largely good or adequate, with poor results recorded on the stiff windscreen pillars and at the base and top of the screen.  Protection of the pelvis, the femur and the knee and tibia was good at all test locations, and the Aygo X scored maximum points in these parts of the assessment.  The autonomous emergency braking system of the Toyota Aygo X responds to vulnerable road users such as pedestrians and cyclists, as well as to other vehicles.  In tests of its response to pedestrians, the system performed well, but offers no protection to those to the rear of the car.  The system also performed well in tests of its reaction to cyclists, but does not protect against ‘dooring’, where a door is opened into the path of a cyclist approaching from behind.  The system’s response to motorcyclists was good.

Overall, the performance of the autonomous emergency braking (AEB) system was good in tests of its reaction to other vehicles.  A seatbelt reminder system is fitted as standard to the front and rear seats.  The car has an indirect driver status monitoring system as standard, detecting driver fatigue but not distraction.  The lane support system gently corrects the vehicle’s path if it is drifting out of lane and also intervenes in some more critical situations.  The speed assistance system identifies the local speed limit.  However, the speed limiter did not control the speed with the accuracy required by Euro NCAP.