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Multimac car seat review: the clever way to fit 4 children in one row

Can the Multimac help larger families fit 3 or 4 children safely across one row without upgrading their car? Find out how it performed in real-life testing for installation, comfort, safety and everyday practicality

Published: June 1, 2026 at 11:22 AM

Our Rating

4.5

A star rating of 4.5 out of 5.

From GBP £1699 RRP

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In a nutshell

A specialist, space-saving car seat system that allows up to 4 children to travel across one row, offering a practical alternative to upgrading your car for larger families.

What we tested

Overall Rating

4.5

A star rating of 4.5 out of 5.

Pros

Cons

The Multimac is an integrated child car seat system designed for larger families who need to fit 3 or 4 children across one row without upgrading to a bigger car. Instead of using separate car seats side by side, the Multimac is one fitted unit with individual harnessed seats, designed to make better use of the available space in the back of a car.

It’s a very different setup from a traditional child car seat, so it’s understandable that parents may have questions about safety, installation and day-to-day use. The Multimac is approved to European child seat safety standard R129, and the brand says it has undergone crash testing across multiple child age and weight combinations.

Is the Multimac safe?

The Multimac is not a standard booster seat or a DIY way of squeezing extra children into a car. It is an integrated child restraint system that is approved to the European R129 safety standard. Multimac says its safety design includes a special-grade aluminium frame, patented support legs designed to deform and absorb crash energy, strong tether strap mountings fixed to the car’s chassis, Adjustamac and chest pads for additional energy absorption, and a 5-point harness system for children up to 12 years old. The optional Ylva headrest is also designed to provide side-impact protection for younger children’s heads and necks. The system has been crash tested at VTI in Sweden, an independent road and transport research institute, and Multimac says it is tested across 11 different child age and weight combinations using 28 dummies. It is tested at the standard 50km/h crash-test speed, but Multimac notes that the key measure is the force generated when the crash-test rig comes to a stop, rather than speed alone. As with any car seat system, correct installation is essential. Multimac strongly recommends professional fitting by one of its nominated fitting agents, and our tester also felt much more comfortable having it professionally installed. You can read more about the safety credentials of the car seat on the Multimac website.

About our parent tester

Sherelle tested the Multimac car seat in a BMW iX with her four children aged 8, 7, 2 and 7 months. She used it for daily school runs and family outings.

How easy is the Multimac to install?

The Multimac was professionally fitted, which took around 90 minutes and needed two people due to the weight of the frame. I felt much more comfortable having it professionally fitted—it’s not something I would have felt confident doing myself.

Multimac strongly recommends installation by one of its nominated fitting agents, and customers can choose to have the system delivered directly to a fitting garage. If you want to move the Multimac between cars, tether straps can be fitted to multiple vehicles, although you will need an additional fitting kit as these are specific to each car.

Once the main frame was in, attaching the rest of the parts was fairly straightforward. Adjusting the safety features, like the headrests and harness heights, was easy to set up for each child.

Multimac car seat being installed in car

How safe and reassuring does the Multimac feel?

Once installed, it felt very secure. The aluminium frame gives it a sturdy, solid feel, and because it is secured using tether straps rather than ISOFIX, it felt very stable once professionally fitted.

It’s worth stressing that the Multimac is not simply a bench seat or space-saving accessory. It is an approved child restraint system that meets the European R129 safety standard. Multimac says the system is crash tested at VTI in Sweden across 11 different child age and weight combinations, using 28 dummies, and is designed with energy-absorbing features including support legs, chest pads, tether strap mountings and a 5-point harness.

Close-ups of Multimac car seat installation points

I also felt reassured that each child had their own harness and that the headrests and chest pads could be adjusted for their individual size. It does feel different from using separate car seats, so I can understand why some parents may have questions at first, but once fitted, it felt robust and secure in daily use.

It’s worth noting that the Minimac is rear-facing only up to 13kg and 82cm. Some parents may prefer to keep their child rear-facing for longer, so this is something to consider depending on your child’s age and your own car seat priorities.

2 pictures of Minimac installed in Multimac car seat

How well made does it feel?

The overall finish feels solid and well made.

The only thing I noticed during testing was that the chest straps have already started to show some crease marks, so I’m not entirely sure how they’ll hold up over time.

Multimac car seat installed in car

How does the Multimac work with multiple children?

All four seats are the same width across the back.

We used one Minimac infant carrier for our 7 month old. This is suitable from birth up to 18 months (13kg and 82cm) and is the only infant carrier designed to work with the Multimac system. It neatly slots into the rear seat behind the front passenger. Once my youngest outgrows the Minimac, it can be removed and replaced with a standard Multimac child seat.

2 pictures of the Multimac car seat Minimac installed in car

This makes the system adaptable as younger children grow, although parents should check the height and weight limits for each setup carefully.

There’s plenty of space for the children to sit comfortably and getting them in and out of the car is straightforward. The older three get in from the rear driver’s side door.

How comfortable is the Multimac for each child?

Although the children are seated quite close together, there’s still enough personal space for them to be comfortable.

The seats don’t have as much padding or side support as some standalone car seats, so they may not be the most comfortable option for longer journeys.

2 pictures of children in Multimac car seat

How easy is the Multimac to use use day to day?

In terms of day-to-day use, the Multimac system is really straightforward to use. Buckling in all four children was simple, and I got into a routine quite quickly. There was enough space to manoeuvre when getting the children in and out.

The headrests and chest pads are simple to adjust, although the harness straps can feel a little stiff when tightening them.

How practical is it for family life?

It’s really practical for family life. It doesn’t eat into boot space and takes up minimal room in the back, so the children still have plenty of legroom. There’s even space behind the Minimac for shopping bags, which is really handy day to day.

The biggest practical benefit is that all 4 children can travel together without needing a bigger car, which has made school runs and family outings much easier.

Children in Multimac car seat

How easy is it to adjust as children grow?

The system works well for families with children at different stages, from the Minimac infant carrier stage through to children up to around 12 years old. You can adjust the seats, harnesses, headrests and chest pads as children grow, which makes it flexible for a changing family setup.

Over time, though, children towards the upper age range may start to feel a little restricted in the setup.

2 pictures of straps and harness on Multimac car seat

How does it compare to using multiple individual car seats?

A huge advantage of using this system rather than individual car seats is the amount of space it frees up in the car and boot, as well as the convenience of having all the children in one row.

It also removes the challenge of trying to find 3 or 4 separate car seats that fit safely side by side, although it is a very different setup and needs professional fitting.

It does cost significantly more than traditional car seats, so that’s definitely something to consider and it can feel like a big investment. However, it’s extremely practical for day-to-day family life.

How easy is it to keep clean?

The seats are wipeable and really easy to keep clean.

You can also lift them up to clean underneath and they click back into place easily afterwards. This is particularly useful with several children using it daily, as crumbs and snack mess are inevitable.

How durable and sustainable is the Multimac car seat?

The Multimac feels like a long-term product. I can see us using it for the next few years as it really suits our current lifestyle.

We’ll still keep our traditional car seats for when the children are travelling with family, as the Multimac isn’t designed to be moved between cars easily. However, if it prevents a family from needing to buy a larger car, that may be part of its wider sustainability appeal.

The system came with minimal packaging, which was a nice touch.

Multimac car seat in box

Is the Multimac worth the money?

For us, yes. We would have spent significantly more upgrading to a larger car, so the Multimac worked out as a more affordable alternative in the long run.

It has also freed up an extra seat in the front, which means we can all travel together, and the kids love it.

That said, it is a big upfront investment. If your children are nearing the end of needing car seats, it might not be the best value, as it comes as one complete system. In that case, separate seats or a larger car might suit your setup better.

Things to consider before buying

The Multimac is designed for families with several young children who want to keep using their existing car, but it won’t suit every setup. It is expensive upfront, needs professional fitting and is not designed to be moved between cars as easily as separate child seats. Parents who strongly prefer extended rear-facing beyond the Minimac stage may also want to factor this into their decision.

Where can I buy the Multimac?

It is available from Multimac

MadeForMums verdict:

Overall, I’m really impressed with the Multimac system. It has made a big difference for our family because all 4 children can travel together in one row without us needing to buy a bigger car.

It is a premium investment and needs professional fitting, but it feels sturdy, practical and well made. I also found it reassuring that it is approved to the latest R129 safety standard and uses individual 5-point harnesses for each child.

I’d recommend it to larger families with young children who need a practical way to fit 3 or 4 children across one row, particularly if the alternative would be changing to a bigger car. However, it may not be the best option if your children are close to outgrowing car seats, if you need to move seats between cars regularly, or if extended rear-facing is your top priority.

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Authors

Sherelle Lauder

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