ISOFIX for dog crates:
permitted or only for child seats?
Why the anchorage in the car is not a child seat accessory, what it does technically and how a dog seat uses it.
The sentence found in every other comment
An owner stands at the car with the rear door open, the crate already halfway onto the seat, and pauses. In his head is a sentence he read in a forum the night before: the anchorages on the rear seat are there for child seats, for nothing else. So he places the crate loosely on the seat, puts a belt over it and drives off. It is exactly this sentence that causes dogs to travel less securely every day than they could.
Many consider ISOFIX for dog crates a misuse. The idea sounds plausible because people know the system from the child seat shelf. But it confuses two things that have nothing to do with each other: the anchorage in the vehicle and what is attached to it.
This article separates the two. First the technology: what these bars actually are and why they do not belong to any particular passenger. Then the practice: how to recognize the anchorages in your car, how installation works and why a second restraint inside remains sensible.
The anchorage in the car knows no passenger.
It only knows a connection.
What the anchorage really is
Between the seat cushion and the backrest sit two small metal bars. They are not attached to the upholstery but to the load-bearing structure of the vehicle. Their spacing, thickness and position are standardized — which is why a matching latch arm fits into every car the same way.
That is all this anchorage is: a fixed point on the vehicle where something can latch in. It does not ask what latches in. It has no function that wears out and no intended recipient for whom it is reserved. Many vehicles also have a third anchor point behind or below the backrest, intended to limit tipping forward.
A dog seat uses these points in the same way as any other compatible system: with two latch arms that hook in and a support that absorbs the tipping moment. This turns an object lying on the upholstery into part of the vehicle.
Where the misunderstanding comes from
01The standard describes child seats, not the bars
The system was developed for child restraint systems, and the associated regulations describe exactly these seats: how they are tested, how they are labeled, which vehicles they fit. Because all the texts you find on the subject deal with child seats, the impression arises that the bars in the car are part of the child seat. But they are part of the vehicle — just like the seat belt buckles, which no one assigns to a particular load either.
02What is established under traffic law
The legal situation in Germany is more concise on this point than the discussion suggests. In road traffic, animals are considered cargo, and cargo must be secured so that it does not slip even during an emergency stop or an evasive maneuver. How you achieve this is not prescribed. We claim nothing more here: we are a manufacturer, not a legal advisor, and where your specific case is concerned, you are better off asking someone who is authorized to give advice on it.
03What you should still check yourself
There are two things to look at before the first installation. First, your vehicle's manual: it states which seating positions have anchorages and where the additional anchor point is located. Second, the installation instructions from the manufacturer of the seat you use. A connection is only as good as its weakest link, and the weakest link is almost always a step someone skipped.
How installation works
First, feel along the gap between the seat cushion and the backrest until you find the two bars. In many cars there are small plastic guides that make it easier to slot in; if they are missing, it helps to briefly take the load off the backrest.
Then position the seat and push it straight back until both latch arms click audibly into place. It is important that both sides engage equally far — if positioned at an angle, often only one side catches. Next comes the support to the front or bottom, depending on the model, and finally the test: grip the body with both hands and shake it firmly. If the seat moves with the vehicle and not on the upholstery, it is seated correctly.
Whether this position is on the rear seat or in the trunk makes no difference to the principle. What matters is the fixed connection to the vehicle, not the location in the car.
How to recognize the anchorages in your car
Most vehicles from recent decades have them; you just cannot see them. Look for a small label or an embossing in the seat cover, often with a pictogram showing a seat and an arrow. It marks the spot where the bars lie in the gap. Sometimes there is a black plastic cap, sometimes just a slit in the seam.
The third point is less often found at first glance. Depending on the design, it is located on the back of the backrest, in the trunk floor or in the headliner, and is usually marked with an anchor symbol. If you are unsure about a spot, look in the manual under the heading child seat attachment — all points are marked there, even if you need them for something else.
If you find no anchorages at any seating position, that is no cause for concern, just a different starting point. The attachment is then carried by the belts, and you take particular care that the seat has no room left to move forward after tightening.
Why the second restraint remains sensible
The connection to the vehicle solves one task: the seat stays where it is. It does not solve the second task, namely keeping the dog in the seat when you open the door at a traffic light, get out at a rest stop or the tailgate opens after a rear-end collision. That is exactly what the eyelet inside is for.
A short leash, hooked in and kept tight, holds the dog in the seat without restricting it. Short here really means short: long enough for it to turn and lie down, and short enough that it cannot get tangled or jump out of the open door. For this there is the DOXAFER® Safety-Leash, which belongs precisely in this eyelet.
Together, this results in two separate levels: on the outside the fixed connection to the vehicle, on the inside the short connection to the dog. If one fails, the other continues to hold. Anyone who has only one of them has half the solution.
What matters during installation
- Both latch arms engage. After latching, pull on the seat and check that both sides hold — a single side will not bear the load.
- The support stands properly. It absorbs the tipping moment and must not rest on a floor mat or a storage compartment.
- No play to the front. The seat may move with the vehicle, not on the upholstery.
- The short leash is hooked in. Before every drive, not only on long journeys.
- Nothing loose next to it. Water bowl, toys and bag belong stowed away, not next to the dog.
How to set up the interior for long drives is covered in the article on dog travel sickness; the matching blanket and the orthopedic floor are part of it for many dogs.
Which size fits your dog?
A seat only secures well if the dog can stand, turn and lie down in it without being cramped — and if at the same time it does not have so much room that it can gather momentum when braking. Measure your dog standing and compare the values instead of going by breed. How the attachment on the rear seat works in detail is explained in the article Dog crate on the rear seat with ISOFIX. You will find matching accessories in the accessories section, and more articles in the magazine.
Start size finder →In brief
The anchorage in the car is an attachment point on the vehicle, not an accessory for a particular type of seat. A dog seat uses it in the same way as any other compatible system — and what ultimately counts under traffic law is simply that your dog is secured. The short leash on the inside, the fixed connection on the outside.
More on the standard, technology and legal situation around Isofix in the car
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