If you’ve come to this page, it’s likely you’re frantically searching for a baby seat for your Porsche 911. A dilemma we found ourselves in and had almost lost hope. Trawling through post after post on Reddit and various forums about how there was no rear facing baby seat that would fit in the back of a 911. Having only had our car for less than a year, we desperately did not want to have to sell it. Something we felt was becoming a real possibility. Pretty much every post we came across told us that even if we did find a baby seat for a Porsche 911, it would render the passenger seat unusable. Something that would just be pointless. However, we would not be defeated, and our determination paid off!
The Options
Our first option was to look at the official Porsche Baby seat iSize. The Porsche website confirms it’s compatible with a 911. However, after more research and contacting numerous people at Porsche, they confirmed that it is not suitable for rear seats. A couple of sources also told us this seat was discontinued as of 1st April 2026. Therefore, this was a none starter.
We found a couple of mentions of various car seats that people had tweaked to make work. But those seemed like a bit of a headache and also they said they rendered the passenger seat unusable, even for smaller passengers. At 5’7″, these wouldn’t work for us. We also couldn’t find any stores in Japan that sold these options. So we certainly weren’t going to be buying them without trying them first.
We measured the space in the back, with the front seat at a relatively comfortable level so that it was still useable. The widest we felt the seat could be was 44cm and around 68cm length. There seemed to be a lot of options available at a length of 67cm but most then had a wider base.
One option that seemed to work was the Cybex Aton 2. It’s dimensions are 66 x 44 x 39cm so I think it would work. However, we couldn’t find any new available in Japan. Google tells us this is because some were recalled and also the trend towards more swivel seats.
So we began our search in Japanese stores for the smallest baby car seat on the market. From research online, we narrowed these down to the Nuna Pipa Urbn and the Joie Gemm3. Nuna and Joie are part of the same company, with Nuna being the more luxury brand, and Joie being the more affordable option.
The Search Begins
As both Nuna and Joie are from the same brand, we headed to the Katoji store in Toyosu to check them both out. We confirmed with the store in advance that they had both models in stock and on display. Our plan was to measure them and put them side by side and make a judgement call.
However, when we got to the shop and the staff saw we were interested, they said we could try them in the car! We were quite surprised, since it was in the middle of a shopping mall. They didn’t even ask for any deposit or passport or anything. We simply gave our name and phone number and off we sauntered with the 2 car seats up to the rooftop.
Nuna Pipa Urbn
The Nuna Pipa Urbn was one seat we saw mentioned on one of the forums. The current version is a very lightweight 3.3kg and it measures 65cm x 43.5cm x 57cm so we hoped that it would be a good fit. One of the best things about the Nuna Pipa Urbn car seat is that it comes with built in isofix fittings. This means you don’t need a separate base or to fiddle on securing with a seatbelt. It simply clicks in place and is secure via isofix. You can of course, also use the seatbelt strap to further secure it.
We were quite shocked at how easy it slid into place and the moment of truth when we put the passenger seat back. It fit! Not only does the seat fit, but there’s also ample space for the passenger too.
The seat does have to be pushed all the way forward. It also has to be at a relatively straight back. But it’s certainly comfortable enough to be used. I could easily sit like this for a couple of hours or more.
To get the seat out was super easy too. You simply pulled a lever at the back of the seat and it unhooked so easily from the isofix. At ¥55,000 (approx £260) it’s not the cheapest out there. It is also compatible with many strollers including (of course) the Nuna ones but also Cybex as well. For the higher price, it certainly ticks all the boxes and still comes in cheaper than the Porsche one was.
Joie i-Gemm 3
The Joie i-Gemm 3 is the smaller seat out of the two, and also the cheaper option at ¥30,580 (approx. £145). It measures at W43.8 × D65.1 × H58.7cm according to the dimensions, however, in reality it’s a lot shorter than the Nuna. It weights in at 4.4kg so a bit heavier than the Nuna. The Joie comes with an isofix base to attach the car seat too or it can be used by securing with the seatbelts. Unfortunately, the base was too long, even with the seat pulled all the way forward. You could possibly make it fit at a push, but you’re guaranteed to ruin the seats.
When you remove the base and fit with only the seatbelts, there was much more space for the passenger than the Nuna. The below pictures show the passenger in the same seat position as the Nuna above. So you can see the big difference in space for the passenger.
The seat could be pushed back a bit as well as being reclined further with the Joie i-Gemm 3. However, securing the seat with the seatbelts was a bit fiddly. I’m sure over time you’d get in to a rhythm and a knack. We also felt that securing just by the seatbelt, didn’t seem as safe as with the isofix. So it’s a shame the base didn’t fit.
Conclusion
We are so happy that we found not one, but two rear facing baby seats for a Porsche 911. Out of the two, our favourite was by far the Nuna Pipa Urbn 2. We felt that overall, we couldn’t find any faults with it, other than being the more expensive option. The weight, ease of fitting into the back seats, ease of release, security of using isofix and the overall look and feel were far superior than the Joie i-Gemm 3. The fact it can also be used on various strollers was an added advantage.
Having said that, we can certainly see why people would go for the Joie over the Nuna. The extra couple of cm space for the passenger does make a difference. As well as the cheaper price tag. Had we been able to fix to the seat with the base/isofix it would’ve been a harder decision for us. But we took the plunge and bought the Nuna Pipa Urbn 2.
We are currently waiting for the delivery (of both the seat and the baby). We can’t wait to try it out and take some pictures of our adventures in the 911 with the new baby. I am sure that it will make for interesting rides with a baby and a cute Westie in the back. We’ll update once we have actual usage of the rear facing baby seat in the Porsche 911 and hope that we won’t be disappointed.
Thanks for reading, and if you have any other options that work, let us know in the comments below.
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