I’ve said repeatedly the car is fine for two kids and three is workable, if at least one is in a booster.

I’m pretty sure the Diono is the slimmest out there, with a 13” wide base. As I said in my original post, I tried multiple combinations with different seats and boosters that work in the Model S and none worked. The Bubble Bum booster works in the middle, but if you don’t have one kid old enough to be in a backless booster, that’s not an option.

Three Diono Radians may work, but I don’t personally think so. I didn’t have three to try it, but looking at the space left next to the Diono, I think it would be 1”+ short. The bubble bum is 13” wide at the widest and fit in the middle pretty snug. The diono is 17” at the widest, so a third probably wouldn’t fit in the middle. You could probably physically get three wide and shut the doors, but I don’t think they’d be in right/safe.

I own a Tesla and own Tesla stock. I have nothing to gain by trashing the Model 3. I’m just trying to give everyone my real world experience with actual car seats and not just what I think based on looking at it. Most people with 3 young kids don’t have $60k to gamble without a test drive.

Hopefully someone proves me wrong, but I just don’t think three car seats is doable.

Edit: your teslarati article says 52.4” hip room. If that is correct, the diono is 17” wide at its widest. 17” x 3 is 51”, so the doors would close, but the outer seats would probably be at the very edge of the cushion or hanging off a little. Most likely, they wouldn’t be able to Latch. To fit three seats and have the outer two latch, I think you’d need 3 seats that were 14”, or possibly even 15” at the widest. The Diono and the Clek are probably too wide. The Cocorro may work at 15” max width, but it’s only good to 40 lbs. My 3 11/12 year old is 52 lbs and my 5 11/12 year old is 48 lbs. What do you do after 40 lbs?

I think the answer is to get someone to measure the distance between all the latch points. Then, I think you can extrapolate the max width per seat and see if a seat exists with that max width.

I’m pretty sure the Diono is the slimmest out there, with a 13” wide base. As I said in my original post, I tried multiple combinations with different seats and boosters that work in the Model S and none worked. The Bubble Bum booster works in the middle, but if you don’t have one kid old enough to be in a backless booster, that’s not an option.

Three Diono Radians may work, but I don’t personally think so. I didn’t have three to try it, but looking at the space left next to the Diono, I think it would be 1”+ short. The bubble bum is 13” wide at the widest and fit in the middle pretty snug. The diono is 17” at the widest, so a third probably wouldn’t fit in the middle. You could probably physically get three wide and shut the doors, but I don’t think they’d be in right/safe.

I own a Tesla and own Tesla stock. I have nothing to gain by trashing the Model 3. I’m just trying to give everyone my real world experience with actual car seats and not just what I think based on looking at it. Most people with 3 young kids don’t have $60k to gamble without a test drive.

Hopefully someone proves me wrong, but I just don’t think three car seats is doable.

Edit: your teslarati article says 52.4” hip room. If that is correct, the diono is 17” wide at its widest. 17” x 3 is 51”, so the doors would close, but the outer seats would probably be at the very edge of the cushion or hanging off a little. Most likely, they wouldn’t be able to Latch. To fit three seats and have the outer two latch, I think you’d need 3 seats that were 14”, or possibly even 15” at the widest. The Diono and the Clek are probably too wide. The Cocorro may work at 15” max width, but it’s only good to 40 lbs. My 3 11/12 year old is 52 lbs and my 5 11/12 year old is 48 lbs. What do you do after 40 lbs?

I think the answer is to get someone to measure the distance between all the latch points. Then, I think you can extrapolate the max width per seat and see if a seat exists with that max width.

To fit 3 across the back, I agree that you almost undoubtedly will have to forgo the LATCH connections for all 3 seats because, as you state, the LATCH connections move the outer seats closer in to the middle. As I understand it, that is just fine so long as the car seats don't interfere (i.e. extend too close to the doors) with the side curtain airbags. I've always understood that LATCH connections were mostly for convenience.

Regarding your question about the Cocorro and what you do after the child reaches 40lbs, wouldn't they be moving toward a booster (assuming age and weight guidance is met)? Of course, its always better to keep them in a car seat longer if possible. In our case, if we have 3 kids, they will be at varying ages such that we will never need 3 full size car seats at once. Our likely set up will be something like a Combi Cocorro (15"), Clek/Radian (17"), and a booster seat (??).

***Please understand that I am not a car seat expert, and that my posts are not advice.***