The passenger compartment remained stable in the offset frontal test. Protection of the driver's chest was rated as weak, based on dummy measurements of compression. Dummy measurements indicated good protection of the knees and femurs of both the driver and passenger. Honda demonstrated that a similar level of protection would be provided to occupants of different sizes and to those sitting in different positions. The Jazz's modest weight and benign front structure did not pose a high risk to the occupants of a colliding vehicle in a frontal offset impact. In the full-width rigid wall test, protection was good or adequate for all body critical body regions for both the driver and the rear seat passenger. In the side barrier test, representing a collision by another vehicle, protection of all critical body areas was good apart from the chest, protection of which was adequate. In the more severe side pole impact, protection was good all-round. In an assessment of protection in far-side impact, dummy excursion (its movement towards the other side of the vehicle) was rated as marginal. The Jazz is equipped with a centre airbag to protect against occupant-to-occupant interaction in side impacts. This system worked well in Euro NCAP's test, with good protection of the head for both front seat occupants. Tests on the front seats and head restraints demonstrated good protection against whiplash injury in the event of a rear-end collision. A geometric assessment of the rear seats also indicated good whiplash protection. The Jazz has an advanced e-Call system which, in the event of an accident, automatically sends a message to the emergency services, giving the car's location.

In both the frontal offset and side barrier tests, protection of both child dummies was good or adequate for all critical parts of the body. 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. One child restraint could not be fitted stably in the centre rear seat. Otherwise, the restraints for which the Jazz is designed could be properly installed and accommodated.

The bonnet provided predominantly good or adequate protection to the head of a struck pedestrian, with some poor results recorded on the stiff windscreen pillars. The bumper provided good or adequate protection to pedestrians' legs and protection of the pelvis was good at most test positions but poor in some. The Jazz's autonomous emergency braking (AEB) system can detect vulnerable road users like pedestrians and cyclists, as well as other vehicles. In tests, the system's response to such road users was good, with collisions avoided or mitigated in most cases. The system does not detect pedestrians to the rear of the car, and reversing tests were not performed.

Autonomous emergency braking (AEB) is fitted as standard. The system performed well in tests of its detection and reaction to other vehicles, with impacts being avoided or mitigated in most cases. The Jazz has a seatbelt reminder for front and rear seats but no driver monitoring system to check for driver fatigue or impairment. The lane support system gently corrects the steering of the car if it is drifting out of lane and also intervenes much more aggressively in some critical situations. A speed assistance system uses a camera to detect the local speed limit. This information is presented to the driver who can confirm that the car is to be limited to that speed.