# Petra All\-in\-One Convertible Car Seat \| live price, prepared checkout ## Built for shopping agents: what RoboTrunk does for every product We asked shopping agents, including Meta's Muse first-hand, what they need from a store. This is what they asked for, and what we have built. RoboTrunk is working through its catalogue, so a step may not be done for this one yet. Where a step is done per product, the line ends with what is done for this product. - **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:* 33 checked facts, research depth trimmed read, checked 2026-10-25T15:01:18.293Z, in the [evidence pack](/agent/evidence/maxicosi-com--petra-all-in-one-convertible-car-seat-cc458). - **Receipts:** Every published fact has a receipt showing its source quote. `check_product` and `get_product` return the checked facts that have one. *This product:* each checked fact listed below has one; the source quotes are in the [evidence pack](/agent/evidence/maxicosi-com--petra-all-in-one-convertible-car-seat-cc458). - **Safety:** `check_product` asks the product-safety regulators live (US CPSC, NHTSA and FDA, Health Canada, the UK's OPSS, Australia's ACCC) whether a recall names a product, listed here or not, and flags a match with its notice; a recall never blocks the buyer. *This product:* this page holds no recall result for it yet; `check_product` asks the regulators now. - **Recall watch:** `watch_recalls` tells the buyer if a product bought here is recalled later. - **Second-hand listings:** `check_listing` runs the same recall check on a second-hand listing someone found, and adds what the listing leaves out and the price new. - **The real price:** The full price to the buyer's country, with shipping and tax, each part quoted from the store's policy or, where a part is not settled, what the total depends on: `check_product` and `search_catalog` take the buyer's country and postcode. *This product:* this store's price was read from its catalogue at 2026-10-25T19:45:32.260Z. - **A checkout that finishes:** RoboTrunk lists only stores whose agent checkout it has verified. `create_checkout` prepares the order at the store; `complete_checkout` returns a link to the store's own checkout. The checkout can be finished in either of two ways: the person taps the link in their own browser, or their agent opens it and completes the checkout. RoboTrunk checks the store's total against a budget ceiling before it issues the link. Payment always happens on the store's own page, and RoboTrunk never holds the money. No store pays for placement; RoboTrunk may earn a commission from some stores via their affiliate programs. - **Markdown copy:** Every page has a Markdown copy: [this page's copy](https://robotrunk.com/products/ucp/maxicosi-com/9037557104694.md). - **Photos and ratings:** Search results carry the product photo and, where the store's own page publishes one, its rating (`search_catalog`). - **Fit answers:** `check_fit` answers whether a listing fits a car, pram or bottle, with the exact quote from the store's page, or says it is not known. - **Back-in-stock watches:** `watch_back_in_stock` starts a watch on a listing the store shows as sold out; `get_back_in_stock_watch` shows when it is back in stock. - **Maker's manual:** `ask_product_manual` answers from the maker's manual with the exact passage and page, or says the manual does not cover it. - **Tools and guide:** Every tool and its description is at https://robotrunk.com/mcp; the guide is at [/agents\.md](/agents.md). - **Research from other stores:** Coming soon: reading other stores' listings of the same product as new research sources. Sold and shipped by maxicosi\.com, maxicosi.com; payment happens on the store's own checkout. Brand: Maxi\-Cosi ## Variants - Sea Shadow: USD 229.99; in stock. Variant id: `gid://shopify/ProductVariant/46966334652470` - Seller: maxicosi\.com. Price: USD 229\.99. Stock: in stock. Variant: Sea Shadow, variant id `gid://shopify/ProductVariant/46966334652470`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://dorel-juvenile-maxi-cosi.myshopify.com/products/petra-all-in-one-convertible-car-seat-cc458). [Get ready to buy from maxicosi\.com: prepare checkout](/checkout-prepare?merchant=maxicosi-com&product_id=gid%3A%2F%2Fshopify%2FProduct%2F9037557104694&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F46966334652470). - Seascape: USD 229.99; in stock. Variant id: `gid://shopify/ProductVariant/47916000215094` - Seller: maxicosi\.com. Price: USD 229\.99. Stock: in stock. Variant: Seascape, variant id `gid://shopify/ProductVariant/47916000215094`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://dorel-juvenile-maxi-cosi.myshopify.com/products/petra-all-in-one-convertible-car-seat-cc458). [Get ready to buy from maxicosi\.com: prepare checkout](/checkout-prepare?merchant=maxicosi-com&product_id=gid%3A%2F%2Fshopify%2FProduct%2F9037557104694&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F47916000215094). - Sea Drift: USD 229.99; out of stock. Variant id: `gid://shopify/ProductVariant/47918544486454` - Seller: maxicosi\.com. Price: USD 229\.99. Stock: out of stock. Variant: Sea Drift, variant id `gid://shopify/ProductVariant/47918544486454`. shipping not recorded; confirmed at merchant checkout. returns not recorded; confirmed at merchant checkout. [Public evidence](https://dorel-juvenile-maxi-cosi.myshopify.com/products/petra-all-in-one-convertible-car-seat-cc458). [Get ready to buy from maxicosi\.com: prepare checkout](/checkout-prepare?merchant=maxicosi-com&product_id=gid%3A%2F%2Fshopify%2FProduct%2F9037557104694&variant_id=gid%3A%2F%2Fshopify%2FProductVariant%2F47918544486454). ## 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. 33 checked facts, checked 2026-10-25T15:01:18.293Z. Research depth: trimmed read. Deep read: the store's own data and 10 outside pages \(the store's own product page; maker page; spec sheet; 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 recall search returned no records for Maxi\-Cosi Petra/CC458\. Health Canada's records mention only an archived Maxi\-Cosi Mico infant car seat and base, not this Petra\. 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 includes many Maxi\-Cosi models but none named Petra or CC458, so this exact seat is not rated there\. NHTSA's Car Seat Ease of Use Ratings \(United States\): NHTSA's published list of 126 ease\-of\-use ratings includes Maxi\-Cosi Pria, Romi, Mico and Rodi models but no Petra CC458, so this exact seat is not rated there\. ADAC's child seat test \(Germany, the UK and Europe\): ADAC's published list since 2015 includes many Maxi\-Cosi seats but no Petra CC458, so this exact seat is not rated there\. Not read, because they are member\-only or refused RoboTrunk: Consumer Reports car seat ratings, Which? child car seat tests, JPMA certified products\. - What it is: It is an all\-in\-one convertible car seat with three modes, from birth up to 10 years and 5–100 lb\.. Source: (guide), read 2026-10-25T14:45:10.603Z. - Warranty: The maker page says a warranty is included but gives no length or terms\.. Source: (guide), read 2026-10-25T14:45:13.096Z. - Design: Maxi\-Cosi describes Petra as a 3\-in\-1 seat that grows from birth through the elementary school years\.. Source: (manual), read 2026-10-25T14:45:14.667Z. - Travel and height fit: The review calls it a good option for travel and for children below the 50th percentile for height\.. Source: (review), read 2026-10-25T14:45:19.159Z. - Comfort and fabrics: The blog praises the plush, breathable fabrics and the one\-click LATCH setup\.. Source: (blog, My Floor Scrubber, published 2026-09-16), read 2026-10-25T14:45:45.303Z. - Rear\-facing limits: Rear\-facing mode is for 5–40 lb and 19–40 in\.. Source: (guide), read 2026-10-25T14:45:10.603Z. - Booster longevity: A buyer wanting one seat for all stages should be cautious: the 52\-inch booster standing\-height limit likely means many children will still need a separate booster\.. Source: (review), read 2026-10-25T14:45:19.159Z. - Adjustment learning curve: The blog says the multiple adjustment mechanisms can seem complex at first, especially for first\-time users\.. Source: (blog, My Floor Scrubber, published 2026-09-16), read 2026-10-25T14:45:45.303Z. - Forward\-facing limits: Forward\-facing mode is for 30–65 lb and 34\.4–49 in\.. Source: (guide), read 2026-10-25T14:45:10.603Z. - Three\-across fit: The review flags three\-across fit as a concern, noting the seat is 19\.25 inches wide\.. Source: (review), read 2026-10-25T14:45:19.159Z. - Fit variability: The blog notes that fit can vary with the child's size and the vehicle\.. Source: (blog, My Floor Scrubber, published 2026-09-16), read 2026-10-25T14:45:45.303Z. - Booster limits: Booster mode is for 40–100 lb and 43\.4–52 in\.. Source: (guide), read 2026-10-25T14:45:10.603Z. - Newborn fit: The review page had no observations yet on how well a newborn fits\.. Source: (review), read 2026-10-25T14:45:19.159Z. - Growth range: The blog warns that some children may outgrow the full range sooner than expected\.. Source: (blog, My Floor Scrubber, published 2026-09-16), read 2026-10-25T14:45:45.303Z. - Installation: The seat uses 1\-click LATCH connectors for installation\.. Source: (guide), read 2026-10-25T14:45:10.603Z. - Suitability: The blog says it may not suit buyers who want minimal adjustments or who have very small vehicles\.. Source: (blog, My Floor Scrubber, published 2026-09-16), read 2026-10-25T14:45:45.303Z. - Adjustable base: The base has three adjustable positions to fit the car\.. Source: (guide), read 2026-10-25T14:45:10.603Z. - Cleaning: The blog counts the removable, washable seat pad and cup holders as cleaning advantages\.. Source: (blog, My Floor Scrubber, published 2026-09-16), read 2026-10-25T14:45:45.303Z. - Headrest and harness: The QuikFit headrest and harness adjust in eight positions with one hand\.. Source: (guide), read 2026-10-25T14:45:10.603Z. - Positioning: The blog picks it as its comfort\-and\-longevity choice in a roundup of premium all\-in\-one seats\.. Source: (blog, My Floor Scrubber, published 2026-09-16), read 2026-10-25T14:45:45.303Z. - Harness rethreading: The headrest and harness adjust without rethreading the harness\.. Source: (guide), read 2026-10-25T14:45:10.603Z. - Fabric: The plush PureCosi fabric is made without added fire retardant treatments\.. Source: (guide), read 2026-10-25T14:45:10.603Z. - Fabric: EcoCare fabric is made from 100% recycled plastic bottles and is described as soft and breathable\.. Source: (guide), read 2026-10-25T14:45:10.603Z. - Infant inserts: The infant head and lumbar inserts remove without rethreading the harness\.. Source: (guide), read 2026-10-25T14:45:10.603Z. - Padding: The infant head and lumbar inserts have extra plush padding for small babies\.. Source: (guide), read 2026-10-25T14:45:10.603Z. - Care: The fabrics are machine washable and dryer safe\.. Source: (guide), read 2026-10-25T14:45:10.603Z. - Cup holders: It has two removable cup holders that are dishwasher safe\.. Source: (guide), read 2026-10-25T14:45:10.603Z. - Safety standards: Maxi\-Cosi says the seat is engineered and tested to meet or exceed federal safety standards\.. Source: (guide), read 2026-10-25T14:45:10.603Z. - Side impact: Maxi\-Cosi says it meets federal side\-impact safety standards\.. Source: (guide), read 2026-10-25T14:45:10.603Z. - Aircraft use: The seat is certified for use on an aircraft\.. Source: (guide), read 2026-10-25T14:45:10.603Z. - Fit caveat: Maxi\-Cosi warns that actual fit varies and not every child will comfortably fit the full listed ranges\.. Source: (guide), read 2026-10-25T14:45:10.603Z. - Origin: The seat is made in Columbus, Indiana\.. Source: (guide), read 2026-10-25T14:45:10.603Z. - Manual: A Petra All\-in\-One Convertible Car Seat user guide is offered on the product page\.. Source: (guide), read 2026-10-25T14:45:10.603Z. The full evidence pack, with every citation, source and gap: [evidence pack](/agent/evidence/maxicosi-com--petra-all-in-one-convertible-car-seat-cc458) ## 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 spec sheet, 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 the manual, 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. - How thick is the padding compared with other convertible car seats? - Does the fabric or shell show pilling, fading or wear over time? - Which vehicle models have confirmed a good fit, and does it fit three across? - How much front\-passenger legroom does it leave when rear\-facing? - What tools are needed to install it? - What specific warnings does the manual give about airbags or accessories? - What exactly is included in the box? - What are the warranty length and terms? - How well does it fit a newborn near the 5 lb minimum? - When should the infant inserts be removed? - What parts tend to break or need replacing with daily use? - Does it fit airplane seats easily in practice? To buy this through RoboTrunk, pass merchant `maxicosi-com`, product_id `gid://shopify/Product/9037557104694` and one variant_id from the list above. Product image of Petra All\-in\-One Convertible Car Seat, supplied by maxicosi\.com: This product on maxicosi.com: Retrieved 2026-10-25T19:45:32.260Z from This page is published by RoboTrunk, a store built for shopping agents. The store named on this page sells the product and ships it. RoboTrunk is not the seller and never holds the money. Buying works in one path. RoboTrunk's tools prepare a checkout at that store, then hand back a short-lived link. The person approves the total; once RoboTrunk has checked the store's total against it, the person is given the checkout link to tap in their own browser, or, if the person prefers and gives permission, their agent may open the link and finish there, and payment always happens on the store's own checkout page. RoboTrunk never takes the payment or sees a card. Where the rest of this site is: - /agent/story.md is what RoboTrunk is and how it works, in full. - /agent/tools.json is every tool, its arguments and its answers. - /agent/merchants is every store you can buy from through RoboTrunk. - /products/ucp is every store's indexed products. - /products/search is one search across every store, in plain words. - [What RoboTrunk is](/agent/story.md) - [Every tool, in your browser through WebMCP](/agent) - [The tools and how to call them](/agent/tools.json) - [The stores you can buy from](/agent/merchants) - [Every store's products](/products/ucp) - [Search every store at once](/products/search)