Dog crate for the car:
Why ISOFIX makes the difference
Seat belt, loose crate or firmly connected safety cell? What really holds in an emergency, what distinguishes the rear seat from the trunk and how to find the right size.
Your dog is a passenger who cannot buckle up on its own
In a collision at 50 km/h, an unsecured dog becomes a projectile. A dog weighing 20 kilograms generates around one ton of impact force — against the front seats, against the occupants, against the windshield. This is not scaremongering, it is physics.
It is also the reason why German road traffic regulations treat animals in the car as cargo that must be secured. So the question is not whether, but with what.
A dog in the car is not a co-driver.
It is a passenger.
The three common solutions — and how good they are
01The seat belt with harness
Inexpensive, quick to put on, available everywhere. A good harness distributes the forces across the chest. The weaknesses: the dog can get tangled, the belt length allows room to move, and cheap harnesses tear exactly where they should hold. Acceptable for short distances, uncomfortable for long journeys.
02The loose wire crate
A crate that simply stands on the surface is not a restraint — no matter how sturdy it looks. What matters is whether it is firmly connected to the vehicle. Then there is the material: if plastic breaks, sharp edges are created. If a wire grid bends, it becomes a trap. And a crate that is heavy and bulky is rarely taken out again.
03The firmly connected safety cell
ISOFIX is the connection that also holds child seats: two standardized anchor points in the rear seat into which the seat clicks. No fiddling with belts, no strapping down, no wondering whether it sits firmly enough this time. The same principle applies in the trunk, with fixed anchoring instead of loose placement.
Both places are good — the connection decides
The most common serious accidents are side and frontal collisions: failure to yield, turning accidents, collisions at intersections. Whether your dog travels on the rear seat or in the trunk is therefore less important than whether its crate is firmly connected to the vehicle.
On the rear seat, ISOFIX does this. In the trunk, our BOOT models do the same — precisely fitted to the cargo area and firmly anchored. Choose according to your vehicle and your everyday life, not a rule of thumb.
One advantage of the rear seat remains: your dog can see and hear you. That reduces stress, and a calm dog gets travel sick less often.
A den, not a cage
Dogs seek out small, sheltered spaces — this is not learned behavior but instinct. A crate with a limited interior, dampened vibrations and a soft floor has a calming effect.
Look for high-resilience foam instead of hard plastic and for an all-round net without gaps to slip through.
What to look for when buying a dog crate
- Connection to the vehicle. ISOFIX or fixed anchoring — nothing that just stands loosely on the surface.
- Material. No hard plastic that can break, no wire bars with sharp ends.
- Installation and removal. If it takes longer than a minute, the crate ends up staying at home.
- Size. The dog must be able to stand, turn around and lie down — but more space is counterproductive in a collision.
- Fit for the car. Not every crate fits every model. Check this before buying, not afterwards.
Finding the right size
The most common wrong decision is the wrong size — usually one size too big, because people want to do something good for their dog. Measure your dog's back length from the withers to the base of the tail and its shoulder height while standing. Together with your car model, both give you the right size.
Our size finder does the math for you: choose your vehicle, enter your dog's measurements, get the right model. It takes about a minute.
If your dog becomes restless, pants or drools on journeys, the article Travel sickness in dogs in the car is also worth reading — it explains why a lack of support is the actual trigger.
Start size finder →In brief
A dog crate only protects if it is firmly connected to the vehicle — on the rear seat with ISOFIX, in the trunk with precisely fitted anchoring. In the end, more important than any test seal is that the solution is so easy to use that you use it every day.
One Click — Safe! View DOXAFER®