Cybex Pallas G3 car seat review: a stress-free upgrade from harnesses?

Our verdict

If you’ve ever tried to wrestle a stubborn four-year-old into a five-point harness in a cramped car park while balancing a school bag, a water bottle and your sanity, you’ll understand why this car seat upgrade felt long overdue for us.

We recently moved our youngest out of his old Joie Every Stage car seat into the Cybex Pallas G3. He’s nearly five, deep in the “I can do it myself” phase and very aware that his older brother just hops in and sorts his own seatbelt. That alone has been enough to spark months of low-level sibling politics.

And honestly, the shift has been great. This is one of those products that makes everyday life easier without making a huge song and dance about it. Getting my son in and out is quicker, there’s far less faff and, once we moved onto using the seatbelt, the independence it gave him made a noticeable difference to our trips out.

The Cybex Pallas G3 does come with a slight learning curve. The impact shield is a different approach if you’re used to a traditional five-point harness, and it won’t be every child’s cup of tea straight away. It’s also not the slimmest car seat out there, so worth thinking about if you’re tight on space. But once you’re used to it, it feels secure, well thought through and reassuringly solid.

What stands out most is how well the Pallas G3 bridges that awkward in-between stage. It feels grown-up enough for an older child, but still offers the kind of safety features that make you feel comfortable about moving on from a traditional harness. Add in the fact it’ll last for years, right through to around age 12, and it starts to justify the higher price tag.

So, is it the car seat that keeps everyone happy? In our case, pretty much. It’s a strong choice if you’re ready to move on from the harness battles but don’t want to compromise on safety or longevity and you’re after something that makes the school run that bit less stressful.

I tested the car seat with my preschooler over the course of a month

How I’ve tested the Cybex Pallas G3

I used the Cybex Pallas G3 daily for a month with our almost five-year-old in our main family car. Most journeys were short school runs (around 10 minutes), with a few longer drives across the Pennines to visit family that lasted 90 minutes and above.

We also had a useful comparison point, as our eldest uses an Axkid Up, so we could see how two premium high-back booster seats stack up in real life, particularly in terms of size, ease of use and overall comfort. 

The Cybex Pallas G3 comes well packaged

First impressions of the Cybex Pallas G3

The Cybex Pallas G3 arrived fully assembled, which was a relief - even the side impact protection. With this car seat, there’s no deciphering diagrams or wondering if you’ve missed a crucial bit.

Straight out of the box, the Cybex Pallas G3 feels like a premium product. Solid, well put together, nicely padded in all the right places.

In the car, it looks smart and grown-up. Less “bulky toddler throne,” more like an actual car seat. Plus it doesn’t look out of place next to our eldest’s Axkid Up, which might be slimmer, but the Cybex doesn’t feel excessive.

As for fabrics, the Cybex Pallas G3 is available in six different colourways. I tested the Almond Beige, which is one of the lighter colour options.

Installation is quick and simple using ISOFIX points

How easy is it to install the Cybex Pallas G3?

We installed the Cybex Pallas G3 using ISOFIX and a top tether initially, as our youngest started out with the impact shield. Everything just clicked. It took no more than five minutes to install it fully in the car using the tether and ISOFIX. Thankfully, it’s not the heaviest car seat at less than 9kg, so lifting it in was smooth enough into our large car. It’s not featherlight, but it’s far from unwieldy.

I was very pleased to find that the ISOFIX connectors are easy to release and slot in without that awkward two-button juggling act some car seats insist on. Clear green indicators confirm when it’s properly fitted, which is reassuring and, once it’s in, it feels very secure. 

Compared to the Axkid Up we already own, the Cybex feels slightly bulkier but more cushioned. It's a reasonably wide seat, so that’s worth bearing in mind if you’re trying to squeeze three across, but in our SUV it hasn’t affected legroom at all. 

The integrated impact shield is one of the main safety features of the Cybex Pallas G3

What are the safety features like on Cybex Pallas G3?

The big talking point here is the integrated impact shield, but it’s not the only safety feature worth mentioning. The Cybex Pallas G3 is an i-Size-approved (UN R129) forward-facing car seat and has been tested to European safety standards, including independent testing such as ADAC, which tends to be what many parents look for beyond brand claims. 

Instead of a traditional harness, younger children sit behind a padded impact shield that clicks into place. As they grow, the impact shield is removed and the seat becomes a high-back booster, taking them up to 150cm (roughly 12 years old). 

I’ll be honest - the impact shield does take a bit of getting used to. It’s a different way of thinking about safety, especially if you’ve been firmly in the harness camp. But once you understand how it works, it starts to make a lot of sense. 

The idea is that in a frontal collision, your child rolls forward into the shield, which spreads the force across a larger surface area rather than concentrating it on the head and neck, as can happen with a harness. Cybex says this helps reduce the risk of neck injuries, which is reassuring if you’re moving away from a rear-facing toddler car seat and want that extra peace of mind.

Alongside this, you’ve got linear side-impact protection built into the seat, designed to absorb forces in the event of a side collision, as well as a reclining headrest that helps keep your child’s head in a safer position if they fall asleep. 

In day-to-day use, the integrated impact shield is also more convenient than a traditional buckle system. It adjusts easily, even one-handed, which helps when you’re juggling everything else.

That said, it won’t suit every child. Some will take to it straight away, while others might need a bit of time to warm to the feeling of it.

I tested the Cybex Pallas G3 with and without the impact shield

How easy is the Cybex Pallas G3 to use day to day?

Getting my youngest in and out of the Cybex Pallas G3 is noticeably quicker than our previous car seat, the Joie Every Stage. For younger children (around 15 months to four years, or 76 to 105cm), the impact shield clicks in easily and feels secure once adjusted. Once your child is older (around four to 12 years, or 100 to 150cm), you switch to using the car’s seatbelt, which makes things even simpler. 

The biggest win for us here is independence. Being able to load both kids into the car and have them buckle themselves in without a full-body wrestling match is lovely. School runs are smoother and I arrive feeling marginally less frazzled. Though, there’s something sad about the closure of one more parenting chapter - my kids no longer need me to buckle them in their car seats. 

Moving on. There’s a small adjustment period with the impact shield, but nothing I’d call fiddly. After a few days, it becomes second nature. 

As for switching the car seat between cars - for example, if you’re sending your children off to the grandparents’ for a sleepover - we haven’t yet had the opportunity to try this. That said, given the fact the ISOFIX connectors are easily removed, I suspect this car seat is as good as our existing Axkid Up to move from car to car. 

The impact shield easily clicks into place

Is the Cybex Pallas G3 car seat comfortable?

Comfort-wise, the Cybex Pallas G3 has been a hit. The padding around the head and sides is generous, and the headrest in particular does a good job of keeping head and neck supported. On longer journeys, our youngest has happily dozed off without his head lolling forward awkwardly.

We’ve had no issues with overheating either. The breathable fabric and ventilation seem to do their job, even on warmer days.

The Cybex Pallas G3 is designed for children aged 15 months to approximately 12 years

Does the Cybex Pallas G3 car seat grow with your child? 

Yes. One of the biggest selling points here is longevity. The Cybex Pallas G3 is designed to take you from toddler years right through to around 12 years old, transitioning from the impact shield to a high-back booster using the car’s seatbelt.

Once we switched to the seatbelt, it instantly felt more “grown up,” which our youngest loved. No twisting, no awkward positioning - it sits nicely across his shoulder and chest. Adjustments are straightforward too. The headrest height (with 12 positions) and recline are easy to tweak, and the three-position reclining headrest is particularly handy for naps, as it helps stop their head flopping forward.

The covers are simple to remove for machine-washing

How easy is the Cybex Pallas G3 to clean?

The covers on the Cybex Pallas G3 are removable and machine-washable at 30°C, which, frankly, is non-negotiable at this stage of parenting. Spills, crumbs, the occasional travel sickness incident - it’s all part of the package. So, being able to strip it down and clean it properly makes a big difference.

It’s not a two-minute job to remove and refit the covers, but once you’ve done it once, it’s manageable and cleans up well once washed.

Cybex Pallas G3 car seat: is it worth the money? 

There’s no getting around it, the Pallas G3 sits at the premium end of the high-back booster market with an RRP of £210. But when you factor in that it could last from toddlerhood through to the end of car seat years, it starts to make more sense. You’re not buying multiple seats as your child grows. Broken down over time, the cost per year feels very reasonable.

Final verdict: is the Cybex Pallas G3 a good option for families?

Overall, the Cybex Pallas G3 is a great fit for families with toddlers or younger children who are ready to move on from the daily harness struggle but still want something that feels safe and well thought through.

It’s particularly handy if your child is itching for a bit more independence, or if you’ve got siblings and you’re trying to reduce the inevitable “why can’t I do that?” debates in the back seat.

I wouldn’t personally choose this car seat from the very earliest age (15 months) that it’s approved for as I prefer extended rear-facing car seats. But coming to it later, as we did, it feels like a natural and very welcome step up.

All in, the Pallas G3 strikes a sensible balance between safety, practicality and long-term value. It’s not the cheapest high-booster seat option, but it’s thoughtfully designed and, more importantly, it makes everyday life that bit easier - which, when you’re juggling two kids and a busy week, counts for a lot.

About the author

Rebecca Roberts (aka Beccy) is Mumsnet's lifestyle editor and a key member of our car seat testing team, bringing a practical, parent-first lens to every review. As a mum of two, she helps assess car seats in real-life conditions - from quick school runs to longer journeys - focusing on what actually matters to busy families: safety, ease of installation, comfort and everyday usability.

Known for her honest, no-nonsense approach, Beccy combines hands-on testing with real-world insight to highlight the car seats that genuinely make parents’ lives easier. When she’s not at her desk, she’s often juggling PTA duties or walking her two dogs along country lanes.