An unrestrained dog in a car is a projectile in a sudden stop - dangerous to itself and to everyone in the cabin. Restraint is not about obedience; it is physics.
Why loose is dangerous
At city speed, an emergency brake throws an unsecured dog forward with many times its body weight. Beyond impact risk, a loose dog can also block the driver's arms or slip out of an opened door straight into traffic.
The seat-belt harness setup
The standard solution: a padded car harness on the dog, connected by a short tether to the seat-belt buckle or the ISOFIX anchor. Two rules make it safe: the tether attaches to a harness, never a collar (neck injury risk), and it stays short enough that the dog can sit and lie down but not reach the front seats.
Back seat, always
Front airbags are sized for adults and can injure a dog even in a minor collision. The back seat - or the cargo area for larger dogs - is the right place.
Getting a reluctant dog used to it
Let the dog wear the car harness at home first, then feed a few meals in the parked car, then take five-minute trips. Most dogs settle within a week when the car stops predicting only vet visits.
See our harness collection for padded car-suitable options and seat-belt attachments in the leash and lead range.