Thanks for the reply. It does seem odd that the extenders are perfectly safe for use with obesity yet far too dangerous for pretty much anything else!

Hi all, I'm looking to buy seat belt extenders (similar to the below image) for my 2016 Tekna in order to accommodate the 3 child booster seats I have on the back seats. My understanding is that the seat belts in Nissans are not the "universal" size, and indeed the extenders I have from my...