Diono Radian incompatibility?



My 7 month old daughter has been using her Diono R100 carseat rearfacing for about a month now and a friend of mine recently saw on a facebook carseat group that Diono isn't compatible with numerous vehicles once it is forward facing. We have the seat set up in our Mazda 6, which my friend said is one of the cars that are incompatible with Diono when forward facing. Can anyone confirm this for me? We plan to buy a new vehicle in the next year or so and I would like to know which SUVs/vans work well with Diono.

On a sidenote, for liability reasons shouldn't the carseat companies be responsible for providing a continuously updated list of vehicles that are compatible/incompatible?!!!



Did you ever get an answer to your question? I'd be interested to know what the problem might be.


CPST and ketchup snob
Staff member
Diono seats frequently range from difficult to impossible to install in many seating positions due to an interaction of the low belt path, awkward base design, and modern vehicles' contours and belt geometry. The increase in fixed forward-leaning head restraints hasn't helped.

The seat was designed back when more vehicles had flatter seats, no protruding head restraints, and often even lap-only belts center. It hasn't been significantly revised since.

There are now many alternatives which are often much easier to install. If you need help in a particular vehicle or your own seat recommendations I'd encourage starting a new thread for more attention to the question. :)

Car-Seat.Org Facebook Group

Forum statistics

Latest member

You must read your carseat and vehicle owner’s manual and understand any relevant state laws. These are the rules you must follow to restrain your children safely. All opinions at Car-Seat.Org are those of the individual author for informational purposes only, and do not necessarily reflect any policy or position of Carseat Media LLC. Car-Seat.Org makes no representations as to accuracy, completeness, currentness, suitability, or validity of any information on this site and will not be liable for any errors, omissions, or delays in this information or any losses, injuries, or damages arising from its display or use. All information is provided on an as-is basis. If you are unsure about information provided to you, please visit a local certified technician. Before posting or using our website you must read and agree to our TERMS.

Graco is a Proud Sponsor of Car-Seat.Org! Britax is a Proud Sponsor of Car-Seat.Org! Nuna Baby is a Proud Sponsor of Car-Seat.Org!

Please  Support Car-Seat.Org  with your purchases of infant, convertible, combination and boosters seats from our premier sponsors above.
Shop travel systems, strollers and baby gear from Britax, Chicco, Clek, Combi, Evenflo, First Years, Graco, Maxi-Cosi, Nuna, Safety 1st, Diono & more! ©2001-2022 Carseat Media LLC