If you’ve landed here, you’ve probably heard the name Multimac mentioned somewhere, looked at the price, and thought “what actually is this?” It’s a reasonable question. The Multimac doesn’t look much like a conventional car seat, it doesn’t install like one, and at first glance it isn’t obvious what problem it’s solving.
This post explains the whole thing from scratch.
The Multimac is a bench seat system that fits across the rear of your car and holds two, three or four children in a single unit. Each child sits in their own individual position within a shared aluminium frame, with their own harness, their own headrest and their own crash protection. It’s approved to European safety standard ECE 44-04 and it’s made in Birmingham.
It exists because standard car seats weren’t designed to share a back seat. Two can usually manage. Three is where things stop working, and four is effectively impossible with conventional seats. The Multimac solves this for families who need more than two children secured in the rear of one car, without buying a different car.
The Multimac is designed for families with multiple children who are running out of back seat. The typical buyer has three children, or two children and a third on the way, and has realised that the car they have won’t take three standard car seats side by side.
It also suits families with four children, families with twins plus an older sibling, and families who’ve been managing with two separate seats and a middle child who travels less comfortably than the other two.
The seat covers children from birth to approximately age 12, so one installation handles multiple children across their entire childhood. A family who fits a Multimac when their youngest is a newborn and their oldest is four typically won’t need to think about car seats again until both children are well into secondary school.
The Multimac is an aluminium frame that sits across the rear bench of your car. The frame connects to your car’s structure using two tether straps, which are bolted to the floor of the vehicle. There is no ISOFIX.
This is the part that surprises most people, because ISOFIX has become so associated with car seat safety that a seat without it sounds like a step backwards. It isn’t. ISOFIX is one method of anchoring a seat to a car. The Multimac’s tether and floor-bolt system is another, and it’s precisely what allows the Multimac to span the full width of the rear bench without being constrained to the two outer ISOFIX positions that limit conventional multi-seat arrangements.
Within the frame, each child position has its own five-point harness, its own adjustable headrest, and its own structural protection. The children share the frame. They don’t share the safety system.
Newborns and young babies use a separate insert called the Minimac, a rear-facing infant seat that clicks into the Multimac frame. The Minimac covers children from birth to approximately 18 months, 13kg or 82cm. Once a child outgrows the Minimac, they move into the standard forward-facing position within the frame using the Ylva Headrest and the five-point harness.
The Minimac is the only infant seat compatible with the Multimac. It’s not a universal car seat that works elsewhere. Its purpose is rear-facing infant travel within the Multimac frame specifically.
The Multimac comes in several configurations, each at a different width to suit different cars and different family sizes.
Three-seat models (for families with up to three children): the 930, 1000, Superclub Junior and Superclub, ranging from the narrowest width suitable for smaller cars through to wider rear benches.
Four-seat models (for families with up to four children): the 1200, 1260 and 1320, again at increasing widths to match different vehicle dimensions.
All models cover the same age range and share the same frame and accessories system. The choice between them comes down to how many children you need to seat and how wide your car’s rear bench is.
The Multimac is installed by a trained Multimac fitter. It’s not a product you fit yourself, and it’s not sold as one.
The installation involves locating the right anchor points in your specific vehicle, bolting the tether straps to the car’s floor structure, and positioning and configuring the frame correctly across the rear seat. Each child position is then set up for the children who’ll be using it, with accessories matched to their ages and sizes.
A professional fitting typically costs between £150 and £250 depending on the vehicle, and takes a couple of hours. Once it’s in, it stays in. The seat can be removed in around five minutes if needed, but most families leave it installed permanently.
The Multimac is designed and manufactured in Birmingham. Automotive Macliver Limited, the company behind it, has been making multi-child car seat systems in the UK since the late 1990s. It’s one of a small number of car seat products that carries Made in Britain status.
The Multimac ranges from approximately £2,000 to £3,000 depending on the model, plus the cost of professional installation. The quote builder on the Multimac website gives an accurate price based on your car and the number and ages of your children.
The upfront cost is the thing that makes most people hesitate. The context that helps is that this is a single purchase covering all your children from birth to 12, replacing what would otherwise be multiple individual seats at different stages for each child. Spread across the number of children using it and the years they’ll use it, the cost per child per year tends to look considerably more reasonable than the headline number suggests.
The Multimac also holds its value well and can be sold on through the Resto-Mac buy-back scheme when your children have outgrown it.
The Multimac fits the majority of standard 5-seat cars with a rear bench. The fitting checker on the Multimac website confirms compatibility for your specific vehicle in a couple of minutes, and will tell you which models suit your car’s dimensions.
If your car is compatible and you want a more specific conversation about which model suits your family, the quote builder takes you through it step by step.
Read enough Multimac reviews and a pattern emerges. The word that comes up most often isn’t “safe” or “practical” or even “expensive.” It’s “wish.” As in: wish we’d done this sooner.
The Multimac is the kind of product that sounds unusual until you’ve used it, at which point the question of why you didn’t get one earlier becomes obvious. Families who’ve spent two years negotiating three separate seats across a rear bench, or who’ve been quietly dreading the arrival of a third child because of what it means for the car, tend to find the Multimac’s logic immediately clear once they’ve seen it in person.
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