Will they teether fit on all headrests?

HI Emma, thank you for your enquiry, we usually recommend the tether to go under the headrest so I am not too sure what you are asking, is it possible for you to pop into your local store, one of our trained techs can access the suitability of the Maxi Cosi Rodi in your vehicle. We hope this helps. if you follow the link https://www.babyonthemove.co.nz/store-locations/ this will take you to our online store finder. Here you can find contact details for your nearest Baby On The Move Store where one of our team experts will be happy to assist you in your product search and help answer any further questions you may have. We hope this has helped with your query.