Britax Safe-n-Sound B-First iFix | live price, prepared checkout

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• Deep research: We read the maker's manual, independent reviews, video review transcripts and the store's own page, and publish each finding with its source and the date read. check_product returns them with a source for each. This product: 35 checked facts, research depth trimmed read, checked 2026-10-07T03:10:25.563Z, in the evidence pack.
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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. 35 checked facts, checked 2026-10-07T03:10:25.563Z. Research depth: trimmed read. Deep read: the store's own data and 10 outside pages (the store's own product page; maker page; manual; review; blog; 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: The CPSC and Health Canada searches read returned no recall records for Britax Safe N Sound or for the B-First iFix. No Australian recall search was among the sources, so this covers the US and Canadian records only. 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 lists the Safe-N-Sound B-First Ifix, series/model BS3300A-i20133, twice, tested with ISOFIX and with the seat belt, both added Aug 2022 under the 2021 onward protocol: rear facing crash protection 3.5 and 3.6 of 5 stars, forward facing 3.2 and 2.8 of 5 stars, ease of use 4.5 of 5 stars in every mode. NHTSA's Car Seat Ease of Use Ratings (United States): The published list of 126 seats contains no Safe-N-Sound or B-First Ifix seat; the Britax entries are US-market models (Advocate, Boulevard, Marathon, Poplar and similar), so this Australian seat has not been rated there. ADAC's child seat test (Germany, the UK and Europe): No seat in ADAC's published list since 2015 has a brand or name containing britaxsafensound or bfirstifix, so this seat has not been tested by ADAC. Not read, because they are member-only or refused RoboTrunk: Consumer Reports car seat ratings, Which? child car seat tests, JPMA certified products.

• suitability: Britax rates the seat for children from birth to roughly 4 years.. Source: https://baby-little-planet.myshopify.com/products.json (listing), read 2026-10-06T20:29:14.451Z.
• what it is: The store's structured data describes it as an ISOFIX rear-facing car seat with advanced SICT side impact protection, a protective shell and a rearward level indicator.. Source: https://baby-little-planet.myshopify.com/products/britax-safe-n-sound-b-first-ifix (guide), read 2026-10-07T02:45:31.200Z.
• installation: ISOFIX installation needs tension applied to two connectors plus top tether fitting, with extra force on the seat and several checks.. Source: https://www.britax.com.au/root/b-first-ifix-convertible-car-seat-charcoal/5637145247.p?rdc=2%5C (guide), read 2026-10-07T02:45:33.737Z.
• manual: Britax publishes a dedicated instruction manual for the B-First Ifix.. Source: https://www.britax.com.au/user-guides (manual), read 2026-10-07T02:45:53.489Z.
• market position: The guide describes this seat as the ISOFIX version of the B-First ClickTight, positioned between the ClickTight and the Graphene and replacing the Millennia.. Source: https://www.parentingcentral.com.au/best-car-seats-australia-2022/ (blog, Parenting Central, published 2022-08-26), read 2026-10-07T02:46:07.374Z.
• safety test: CREP tested the Safe-N-Sound B-First Ifix (BS3300A-i20133) with ISOFIX under the 2021 onward protocol, added Aug 2022: rear facing crash protection 3.5 of 5 stars and ease of use 4.5 of 5 stars.. Source: https://www.childcarseats.com.au/api/v1/child_car_seats/filter_data/retrieve?_format=json (guide), read 2026-10-07T02:46:18.274Z.
• rearward facing limits: It is used rearward facing from birth to about 2-3 years.. Source: https://baby-little-planet.myshopify.com/products.json (listing), read 2026-10-06T20:29:14.451Z.
• installation position: Britax prefers the centre rear seat, but because most vehicles have no centre ISOFIX anchorages the seat belt should be used there.. Source: https://www.britax.com.au/root/b-first-ifix-convertible-car-seat-charcoal/5637145247.p?rdc=2%5C (guide), read 2026-10-07T02:45:33.737Z.
• aircraft: Britax publishes an aircraft compatible car seats chart covering its range.. Source: https://www.britax.com.au/user-guides (manual), read 2026-10-07T02:45:53.489Z.
• width: The guide's 0-4 years table lists the B-First Ifix as 46.7cm wide, among the wider seats in that group.. Source: https://www.parentingcentral.com.au/best-car-seats-australia-2022/ (blog, Parenting Central, published 2022-08-26), read 2026-10-07T02:46:07.374Z.
• safety test: In the same ISOFIX test the forward facing mode scored crash protection 3.2 of 5 stars and ease of use 4.5 of 5 stars.. Source: https://www.childcarseats.com.au/api/v1/child_car_seats/filter_data/retrieve?_format=json (guide), read 2026-10-07T02:46:18.274Z.
• forward facing limits: It is used forward facing from about 12 months to 4 years.. Source: https://baby-little-planet.myshopify.com/products.json (listing), read 2026-10-06T20:29:14.451Z.
• gated buckle: A gated buckle may be used with this seat only when it is installed with the vehicle seat belt.. Source: https://www.britax.com.au/root/b-first-ifix-convertible-car-seat-charcoal/5637145247.p?rdc=2%5C (guide), read 2026-10-07T02:45:33.737Z.
• safety test: The same seat tested with the seat belt scored rear facing crash protection 3.6 of 5 stars and ease of use 4.5 of 5 stars.. Source: https://www.childcarseats.com.au/api/v1/child_car_seats/filter_data/retrieve?_format=json (guide), read 2026-10-07T02:46:18.274Z.
• dimensions: Rearward facing the seat measures 508 mm high, 467 mm wide and 728 mm deep.. Source: https://baby-little-planet.myshopify.com/products.json (listing), read 2026-10-06T20:29:14.451Z.
• top tether: The top tether must always be used.. Source: https://www.britax.com.au/root/b-first-ifix-convertible-car-seat-charcoal/5637145247.p?rdc=2%5C (guide), read 2026-10-07T02:45:33.737Z.
• weight and dimensions: CREP's own record for this seat gives a weight of 10.7 kg and shell dimensions of 730-800 mm high, 450 mm deep and 470 mm wide when upright, which differs from the store's 9.9 kg and 508/650 mm figures.. Source: https://www.childcarseats.com.au/api/v1/child_car_seats/filter_data/retrieve?_format=json (guide), read 2026-10-07T02:46:18.274Z.
• dimensions: Forward facing upright it measures 650 mm high, 467 mm wide and 538 mm deep.. Source: https://baby-little-planet.myshopify.com/products.json (listing), read 2026-10-06T20:29:14.451Z.
• accessories: Britax does not recommend aftermarket accessories other than Britax branded ones.. Source: https://www.britax.com.au/root/b-first-ifix-convertible-car-seat-charcoal/5637145247.p?rdc=2%5C (guide), read 2026-10-07T02:45:33.737Z.
• weight: Britax gives the seat weight as 9.9 kg.. Source: https://baby-little-planet.myshopify.com/products.json (listing), read 2026-10-06T20:29:14.451Z.
• seat angle: The rearward-facing seat angle range is specified by the AS/NZS 1754:2013 standard.. Source: https://www.britax.com.au/root/b-first-ifix-convertible-car-seat-charcoal/5637145247.p?rdc=2%5C (guide), read 2026-10-07T02:45:33.737Z.
• height markers: The seat has a lower height marker at 350 mm, a transition marker at 390 mm and an upper marker at 435 mm.. Source: https://baby-little-planet.myshopify.com/products.json (listing), read 2026-10-06T20:29:14.451Z.
• shell: The closed shell has deeper side wings that create a larger barrier between the child and the vehicle.. Source: https://www.britax.com.au/root/b-first-ifix-convertible-car-seat-charcoal/5637145247.p?rdc=2%5C (guide), read 2026-10-07T02:45:33.737Z.
• side impact: Advanced SICT is a deployable crumple-zone feature fitted in the headrest and torso of the seat.. Source: https://baby-little-planet.myshopify.com/products.json (listing), read 2026-10-06T20:29:14.451Z.
• fabric feel: Thermo5 fabric is knitted, feels smooth on the skin and soft to touch, and wicks moisture away to keep the baby cool and dry.. Source: https://www.britax.com.au/root/b-first-ifix-convertible-car-seat-charcoal/5637145247.p?rdc=2%5C (guide), read 2026-10-07T02:45:33.737Z.
• installation: ISOFLEX latch connectors let the seat be installed to a vehicle's ISOFIX low anchorages instead of with the seat belt.. Source: https://baby-little-planet.myshopify.com/products.json (listing), read 2026-10-06T20:29:14.451Z.
• level indicator: The level indicator shows an optimal installation range for the rearward-facing angle.. Source: https://www.britax.com.au/root/b-first-ifix-convertible-car-seat-charcoal/5637145247.p?rdc=2%5C (guide), read 2026-10-07T02:45:33.737Z.
• comfort: Ventilation zones in the rear interior and exterior of the seat improve airflow for a rearward-facing child.. Source: https://baby-little-planet.myshopify.com/products.json (listing), read 2026-10-06T20:29:14.451Z.
• installation: Coloured belt paths are built in to guide correct seat-belt installation.. Source: https://baby-little-planet.myshopify.com/products.json (listing), read 2026-10-06T20:29:14.451Z.
• harness: The harness adjuster button is positioned lower and inset to make it harder for a child to reach.. Source: https://baby-little-planet.myshopify.com/products.json (listing), read 2026-10-06T20:29:14.451Z.
• harness: The headrest and harness height can be adjusted from the front without taking the seat out of the car.. Source: https://baby-little-planet.myshopify.com/products.json (listing), read 2026-10-06T20:29:14.451Z.
• insert: A Flexi Infant Comfort Insert with EVA composite material and detachable wings is supplied and can be removed as the baby grows.. Source: https://baby-little-planet.myshopify.com/products.json (listing), read 2026-10-06T20:29:14.451Z.
• fabric: The seat uses Thermo5 high performance fabric.. Source: https://baby-little-planet.myshopify.com/products.json (listing), read 2026-10-06T20:29:14.451Z.
• shell: The enclosed shell is designed to keep the child inside the protective parts of the seat.. Source: https://baby-little-planet.myshopify.com/products.json (listing), read 2026-10-06T20:29:14.451Z.
• colours and codes: The seat comes in Black and Charcoal, with GTINs 9311742036600 and 9311742036617.. Source: https://baby-little-planet.myshopify.com/products.json (listing), read 2026-10-06T20:29:14.451Z.

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 maker's page, the manual, owner reviews, blogs, 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 regulator recall notices, 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.

• What exactly is included in the box with this car seat?
• What warranty does Britax give on the B-First iFix?
• How do I remove and wash the seat cover?
• Can this seat be used on an aircraft?
• Does the car seat have an expiry date, and when is it?
• Does the fabric pill or wear with heavy use?
• Can a toddler pull the harness loose through the adjuster strap?
• Where is the serial number for product registration?
• Which specific vehicle models has ISOFIX fitting been confirmed in?
• Can three of these seats fit across a back seat?
• How long does a first-time installation usually take?
• Does it fit behind the driver in a small car when rearward facing?

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