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Diono Radian 3QX Ultimate 3 Across All-in-One Car Seat | live price, prepared checkout

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Sold and shipped by megababiesusa.com, megababiesusa.com; payment happens on the store's own checkout.

Brand: Diono

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Checked facts

Each fact below was checked against the source it cites before it was published. Each carries that source's link and the time RoboTrunk read it. 82 checked facts, checked 2026-10-18T23:54:26.801Z. Research depth: trimmed read. Deep read: the store's own data and 12 outside pages (the store's own product page; manual; recall notice; blog; review; regulator recall search (CPSC (United States)); regulator recall search (Health Canada); official safety test results (CREP, the Child Restraint Evaluation Program); official safety test results (NHTSA's Car Seat Ease of Use Ratings); official safety test results (ADAC's child seat test)), each read in full by RoboTrunk and trimmed to its main content, then written up and checked. Facts from the maker or a manual quote the page word for word; what real users report is summarised with a link to the page read. Recall status was checked directly with CPSC (United States), Health Canada: Transport Canada recall 2024718 covers 2019–2024 Diono Radian 3QX seats; the issue is that rear-facing installation with the universal anchorage system may not meet Canadian requirements. Diono says owners may keep using the seat rear-facing with the vehicle seat belt and can obtain a free foam-insert remedy kit. A CPSC search returned no records for Diono/Radian 3QX. Official safety test results were looked up directly with CREP, the Child Restraint Evaluation Program, NHTSA's Car Seat Ease of Use Ratings, ADAC's child seat test: CREP, the Child Restraint Evaluation Program (Australia and New Zealand): CREP's published list of 216 tested seats contains no Diono or Radian 3QX seat, and its text says the list is complete, so this seat has not been rated by CREP. NHTSA's Car Seat Ease of Use Ratings (United States): NHTSA lists the Diono Radian 3QX model 50321-NA-01, the Gray Slate SKU, made 2021-02-23. It gives 3 of 5 stars overall in rear-facing, 3 of 5 in forward-facing and 1 of 5 in booster mode; these are ease-of-use ratings, not crash-test results. ADAC's child seat test (Germany, the UK and Europe): ADAC tested the Diono Radian 5 in 2016, not the Radian 3QX, and gave it an overall grade of 5.5 (poor); that result cannot be carried over to the 3QX. Not read, because they are member-only or refused RoboTrunk: Consumer Reports car seat ratings, Which? child car seat tests, JPMA certified products.

The full evidence pack, with every citation, source and gap.

Questions we researched but could not confirm

Every fact above is cited. To find them we read the store listing, the manual, a regulator's recall notice, blogs, owner reviews, the recall records of CPSC (United States) and Health Canada and the safety test results of CREP, the Child Restraint Evaluation Program, NHTSA's Car Seat Ease of Use Ratings and ADAC's child seat test and searched for the maker's page, owner forums and video reviews. We also chased the questions below across those sources and found no reliable answer, so you know exactly where the evidence ends and never have to guess.

Recall notice

This listing matches a model named in a regulator's notice, as the index stood on 2026-09-25.

This listing is the brand and model a regulator's notice names. Two AI models judged it so independently. It does not mean the unit on sale is from an affected batch, that the store knew, or that the product is illegal where the store sells it; a US recall does not bind an Australian store. The notice may cover only some serial numbers or dates of manufacture, which a listing does not show. RoboTrunk never limits or blocks a purchase over a notice; read the notice and decide.

How RoboTrunk matches products to recall notices

To buy this through RoboTrunk, pass merchant megababiesusa-com, product_id gid://shopify/Product/5504254312601 and one variant_id from the list above.

Product image of Diono Radian 3QX Ultimate 3 Across All-in-One Car Seat, supplied by megababiesusa.com: https://cdn.shopify.com/s/files/1/0012/1520/1341/products/2_DIONO_50320-NA-01_RADIAN3QX_LATCH_BLACK_JET_newborn_rear-facing_cut_out_800-01.jpg?v=1597259385

This product on megababiesusa.com

Retrieved 2026-10-23T19:35:47.897Z from https://top-stroll.myshopify.com/products.json

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