Seeking Booster Seat/car Seat (High Weight 5 Pt Harness) Advice

I have a ford focus hatchback 2door car. Pretty small...

I fit the Britax Regent in my backseat just fine actually fits better than the Marathon does. It does take up one whole seat and some of the middle seat so if you need other passengers back there it is wide. I have a only child though so not a problem for me.

The Sunshine Kids Radian 80 is also a great option and not as wide. I have seen a family with sextuplets use that seat in a van and everyone fits.

J.-
I also have a Toyota Matrix and my son, who is also big for his age, needed a bigger seat. We went with the Graco Air Turbo Booster. I was a little concerned, like you, not having the harness and the car seat style anchors in the car, but he couldn't fit in many of the 5 point harnesses, and the Britax was just too huge for the car. Anyway, I have been pleased with the Graco; it just uses the seat belt, fits well in the back seat of the Matrix, and is really easy for him to get in and out of. It takes a little getting used to after the traditional car seat, but it seems comfortable, and easy to use once you get the hang of it. It is also a breeze to move between cars. You can also use it for awhile...I think the weight cut off is fairly high. Good luck, and I hope this helps!

We have been able to fit our Britax Marathon in my husband's VW bug so it may be able to work. My son is really tall too and it's still working for now!

I haven't actually seen one yet, other than on-line but we are looking into a Sunshine Kids radian80

Just google that and you should be able to bring up info on it. It looks to me like the best 5-point harness booster on the market.

Good luck!
~A.