{
  "schema_version": "compare-page.v2",
  "page_id": "booster-car-seats-that-fit-three-across",
  "url": "https://robotrunk.com/compare/want/booster-car-seats-that-fit-three-across",
  "title": "Booster car seats that fit three across in a back seat",
  "question": "Which booster car seats are reported to fit three across in a vehicle's back seat?",
  "answer": "Diono Connect3 RXT: Diono says it fits three-across and is less than 17 inches wide without sacrificing interior seat space. A parent reports that a Diono backless booster fits in the middle between two Diono Radian 3R seats in a Subaru Forester with no fit issues, and that a similar setup also fit in a small Tesla and a RAV4.\n\nPeg Perego Viaggio Flex 120: Its narrow footprint made a difficult three-across situation work, and despite having no armrests the belt fit was consistently good across the vehicles and seating positions tried.\n\nBritax UpNGo Click: The seat is 17.1 inches wide and is designed to fit three across in most vehicles, but Britax will not guarantee 3-across fitment in every vehicle.\n\nBritax UpNGo: The maker does not guarantee that three of these seats will fit across every vehicle's back seat. The seat is 17.1 inches wide (SpaceSaver design), intended to leave room for siblings or carpoolers.",
  "kind": "booster car seat",
  "market": "US",
  "generated_at": "2026-10-19T06:27:10.347Z",
  "columns": [
    "Three-across fit",
    "Width"
  ],
  "notices": {
    "facts": "Every value in the table is a fact RoboTrunk checked, linked to the page it came from. A dash means no checked fact fills that cell.",
    "price": "Prices and stock change, so this page prints neither: each product name links to its RoboTrunk page, which shows them live."
  },
  "cited_facts": [
    {
      "ref": "p1.f3",
      "product": "Diono Connect3 RXT",
      "field": "three-across fit",
      "value": "A parent reports that a Diono backless booster fits in the middle between two Diono Radian 3R seats in a Subaru Forester with no fit issues, and that a similar setup also fit in a small Tesla and a RAV4.",
      "stated_as": "A parent reports that a Diono backless booster fits in the middle between two Diono Radian 3R seats in a Subaru Forester with no fit issues, and that a similar setup also fit in a small Tesla and a RAV4.",
      "source_type": "review",
      "source_url": "https://redditrecs.com/travel-car-seat/model/diono-connect3-rxt-backless-booster-latch/",
      "source_read_at": "2026-10-18T22:20:30.223Z"
    },
    {
      "ref": "p1.f4",
      "product": "Diono Connect3 RXT",
      "field": "3-across width",
      "value": "Diono says it fits three-across and is less than 17 inches wide without sacrificing interior seat space.",
      "stated_as": "Fits 3-Across – less than 17\" wide without sacrificing interior seat space.",
      "source_type": "listing",
      "source_url": "https://top-stroll.myshopify.com/products.json",
      "source_read_at": "2026-10-18T19:37:33.814Z"
    },
    {
      "ref": "p1.f7",
      "product": "Diono Connect3 RXT",
      "field": "dimensions",
      "value": "The seat measures 9.1 inches high, 16.3 inches wide and 15.4 inches deep.",
      "stated_as": "Dimensions: 9.1\" H x 16.3\" W x 15.4\" D",
      "source_type": "listing",
      "source_url": "https://top-stroll.myshopify.com/products.json",
      "source_read_at": "2026-10-18T19:37:33.814Z"
    },
    {
      "ref": "p2.f9",
      "product": "Britax UpNGo Click",
      "field": "seat width and 3-across",
      "value": "The seat is 17.1 inches wide and is designed to fit three across in most vehicles, but Britax will not guarantee 3-across fitment in every vehicle.",
      "stated_as": "This slim booster seat is designed to fit 3 across in most vehicles without compromising safety or comfort. *Britax cannot guarantee 3-across fitment in all vehicles.",
      "source_type": "listing",
      "source_url": "https://strolleria.myshopify.com/products.json",
      "source_read_at": "2026-10-12T20:06:05.806Z"
    },
    {
      "ref": "p3.f7",
      "product": "PEG Perego Viaggio Flex 120",
      "field": "fit to vehicle",
      "value": "Its narrow footprint made a difficult three-across situation work, and despite having no armrests the belt fit was consistently good across the vehicles and seating positions tried.",
      "stated_as": "Its narrow footprint made a difficult three-across situation work, and despite having no armrests the belt fit was consistently good across the vehicles and seating positions tried.",
      "source_type": "blog",
      "source_url": "https://carseatblog.com/46427/peg-perego-viaggio-flex-120-booster-review-no-armrests-no-problem/",
      "source_read_at": "2026-10-10T14:48:23.570Z"
    },
    {
      "ref": "p4.f2",
      "product": "Britax UpNGo",
      "field": "dimensions",
      "value": "Assembled dimensions are 15.5 inches long, 17.1 inches wide and 9 inches high.",
      "stated_as": "Product Dimensions: 15.5\" L × 17.1\" W × 9\" H",
      "source_type": "guide",
      "source_url": "https://strolleria.myshopify.com/products/britax-upngo-backless-booster-car-seat-raven-black",
      "source_read_at": "2026-10-13T01:06:58.930Z"
    },
    {
      "ref": "p4.f7",
      "product": "Britax UpNGo",
      "field": "three-across fit not guaranteed",
      "value": "The maker does not guarantee that three of these seats will fit across every vehicle's back seat.",
      "stated_as": "*Britax cannot guarantee 3-across fitment in all vehicles.",
      "source_type": "listing",
      "source_url": "https://strolleria.myshopify.com/products.json",
      "source_read_at": "2026-10-12T20:06:05.806Z"
    },
    {
      "ref": "p4.f9",
      "product": "Britax UpNGo",
      "field": "seat width and three-across fit",
      "value": "The seat is 17.1 inches wide (SpaceSaver design), intended to leave room for siblings or carpoolers.",
      "stated_as": "17.1” seat leaves plenty of room for siblings & carpoolers without compromising trusted Britax safety and premium comfort.",
      "source_type": "guide",
      "source_url": "https://us.britax.com/shop/car-seats/upngo-backless-belt-positioning-booster-seat",
      "source_read_at": "2026-10-13T01:07:00.569Z"
    }
  ],
  "rows": [
    {
      "rank": 1,
      "merchant": {
        "slug": "megababiesusa-com",
        "display_name": "megababiesusa.com"
      },
      "product_id": "gid://shopify/Product/8673372274942",
      "name": "Diono Connect3 RXT",
      "url": "/products/ucp/megababiesusa-com/8673372274942",
      "why": "Diono says it fits three-across and is less than 17 inches wide without sacrificing interior seat space.",
      "cells": [
        {
          "column": "Three-across fit",
          "fact": {
            "field": "3-across width",
            "value": "Diono says it fits three-across and is less than 17 inches wide without sacrificing interior seat space.",
            "stated_as": "Fits 3-Across – less than 17\" wide without sacrificing interior seat space.",
            "source_type": "listing",
            "source_url": "https://top-stroll.myshopify.com/products.json",
            "source_read_at": "2026-10-18T19:37:33.814Z"
          }
        },
        {
          "column": "Width",
          "fact": {
            "field": "dimensions",
            "value": "The seat measures 9.1 inches high, 16.3 inches wide and 15.4 inches deep.",
            "stated_as": "Dimensions: 9.1\" H x 16.3\" W x 15.4\" D",
            "source_type": "listing",
            "source_url": "https://top-stroll.myshopify.com/products.json",
            "source_read_at": "2026-10-18T19:37:33.814Z"
          }
        }
      ]
    },
    {
      "rank": 2,
      "merchant": {
        "slug": "albeebaby-com",
        "display_name": "albeebaby.com"
      },
      "product_id": "gid://shopify/Product/9564437938407",
      "name": "PEG Perego Viaggio Flex 120",
      "url": "/products/ucp/albeebaby-com/9564437938407",
      "why": "Its narrow footprint made a difficult three-across situation work, and despite having no armrests the belt fit was consistently good across the vehicles and seating positions tried.",
      "cells": [
        {
          "column": "Three-across fit",
          "fact": {
            "field": "fit to vehicle",
            "value": "Its narrow footprint made a difficult three-across situation work, and despite having no armrests the belt fit was consistently good across the vehicles and seating positions tried.",
            "stated_as": "Its narrow footprint made a difficult three-across situation work, and despite having no armrests the belt fit was consistently good across the vehicles and seating positions tried.",
            "source_type": "blog",
            "source_url": "https://carseatblog.com/46427/peg-perego-viaggio-flex-120-booster-review-no-armrests-no-problem/",
            "source_read_at": "2026-10-10T14:48:23.570Z"
          }
        },
        {
          "column": "Width",
          "fact": null
        }
      ]
    },
    {
      "rank": 3,
      "merchant": {
        "slug": "strolleria-com",
        "display_name": "strolleria.com"
      },
      "product_id": "gid://shopify/Product/8008999993418",
      "name": "Britax UpNGo Click",
      "url": "/products/ucp/strolleria-com/8008999993418",
      "why": "The seat is 17.1 inches wide and is designed to fit three across in most vehicles, but Britax will not guarantee 3-across fitment in every vehicle.",
      "cells": [
        {
          "column": "Three-across fit",
          "fact": {
            "field": "seat width and 3-across",
            "value": "The seat is 17.1 inches wide and is designed to fit three across in most vehicles, but Britax will not guarantee 3-across fitment in every vehicle.",
            "stated_as": "This slim booster seat is designed to fit 3 across in most vehicles without compromising safety or comfort. *Britax cannot guarantee 3-across fitment in all vehicles.",
            "source_type": "listing",
            "source_url": "https://strolleria.myshopify.com/products.json",
            "source_read_at": "2026-10-12T20:06:05.806Z"
          }
        },
        {
          "column": "Width",
          "fact": {
            "field": "seat width and 3-across",
            "value": "The seat is 17.1 inches wide and is designed to fit three across in most vehicles, but Britax will not guarantee 3-across fitment in every vehicle.",
            "stated_as": "This slim booster seat is designed to fit 3 across in most vehicles without compromising safety or comfort. *Britax cannot guarantee 3-across fitment in all vehicles.",
            "source_type": "listing",
            "source_url": "https://strolleria.myshopify.com/products.json",
            "source_read_at": "2026-10-12T20:06:05.806Z"
          }
        }
      ]
    },
    {
      "rank": 4,
      "merchant": {
        "slug": "strolleria-com",
        "display_name": "strolleria.com"
      },
      "product_id": "gid://shopify/Product/8085815623754",
      "name": "Britax UpNGo",
      "url": "/products/ucp/strolleria-com/8085815623754",
      "why": "The seat is 17.1 inches wide (SpaceSaver design), intended to leave room for siblings or carpoolers.",
      "cells": [
        {
          "column": "Three-across fit",
          "fact": {
            "field": "three-across fit not guaranteed",
            "value": "The maker does not guarantee that three of these seats will fit across every vehicle's back seat.",
            "stated_as": "*Britax cannot guarantee 3-across fitment in all vehicles.",
            "source_type": "listing",
            "source_url": "https://strolleria.myshopify.com/products.json",
            "source_read_at": "2026-10-12T20:06:05.806Z"
          }
        },
        {
          "column": "Width",
          "fact": {
            "field": "dimensions",
            "value": "Assembled dimensions are 15.5 inches long, 17.1 inches wide and 9 inches high.",
            "stated_as": "Product Dimensions: 15.5\" L × 17.1\" W × 9\" H",
            "source_type": "guide",
            "source_url": "https://strolleria.myshopify.com/products/britax-upngo-backless-booster-car-seat-raven-black",
            "source_read_at": "2026-10-13T01:06:58.930Z"
          }
        }
      ]
    }
  ]
}