How-to
How to secure a dog in the car: a step-by-step guide
Last updated: 2026-09-22
Fit your dog with a well-fitted harness, clip a seat belt restraint into a standard seatbelt socket, attach the other end to the harness's back or chest ring, then adjust the strap so your dog can sit and lie down but can't reach the footwell or a window.
The quickest way to keep your dog restrained and legal is an adjustable 3-in-1 dog car seat belt that clips into any standard seatbelt socket.
What you need
A well-fitted dog harness (never rely on a collar for car restraint), and a seat belt restraint that clips into a standard seatbelt socket. Our 3-in-1 dog car seat belt covers the restraint and also works as a lead and tether.
Common mistakes to avoid
Attaching to a collar instead of a harness — this can injure the neck in a sudden stop. Leaving the strap too long so the dog reaches the footwell, a window, or can be thrown far in a crash. Letting a dog travel loose in the front seat, where an airbag can seriously injure them.
Check the fit on every journey, and give a nervous dog a few short trips to get used to being clipped in.
Step by step
- 1Fit the harnessPut your dog's harness on and check the fit — you should be able to slip two fingers underneath it comfortably.
- 2Sit the dog where they'll travelSettle your dog on the seat they'll ride on, ideally a back seat away from active airbags.
- 3Clip into the seatbelt socketPush the metal tongue of the restraint into a standard seatbelt socket until it clicks, the same way you buckle yourself in.
- 4Attach to the harnessClip the other end to the harness's back or chest ring — never to a collar.
- 5Adjust the lengthSet the strap so your dog can sit and lie down comfortably but cannot reach the footwell, a window, or the driver.
Frequently asked questions
Should I attach the seat belt to a collar or a harness?
Always a well-fitted harness. A collar attachment can injure a dog's neck in a sudden stop. If you don't have a harness yet, add one before using any car restraint.
Where is the safest place for a dog to travel in a car?
On a back seat, restrained with a seat belt harness, or in a crash-tested crate or the boot behind a dog guard. Avoid the front seat where an airbag can injure a dog.
Sources: UK Highway Code, Rule 57. General canine road-safety guidance from UK animal-welfare charities. Guidance only — not veterinary or legal advice.