Chicco Corso Sold as a set with Chicco KeyFit 30 Zip.
Which base takes which seat?
KeyFit 30 carriers belong on KeyFit or KeyFit 30 bases. The KeyFit 35 and Fit2 carriers must not be used on a KeyFit or KeyFit 30 base. Chicco manual (PDF)
The KeyFit 35 base takes KeyFit, KeyFit 30 and KeyFit 35 carriers, but not the Fit2 carrier. Chicco manual (PDF)
Fit2 carriers only go on Fit2 bases, and KeyFit, KeyFit 30 or KeyFit 35 carriers must not be clicked into a Fit2 base. Chicco manual (PDF)
Chicco suggests one base for each car the baby rides in regularly, so the carrier can move between cars without reinstalling. Chicco help article
Reusing older parts
Second baby, or upgrading one piece: what carries over and what doesn't.
Will parts move between models?
Every KeyFit carrier clicks into Chicco's compatible strollers, so one carrier moves across the Chicco travel-system strollers. Chicco product page
The KeyFit 30 can be used for 6 years. The "Do Not Use After" date is printed on the maker's label under the seat. Chicco manual (PDF)
How do I hear about a recall?
Register the seat so Chicco can reach you in a recall. Mail the card that came with it, call 1-877-424-4226, or register online at chiccousa.com/carseatregistration.aspx. Chicco manual (PDF)
Care and warranty
Keeping it clean, and what the maker covers.
How do I clean it?
Car seat fabrics can be spot-cleaned, hand-washed with mild soap, or machine-washed cold on a delicate cycle with mild detergent, then hung to dry. Chicco manual (PDF)
On the Corso stroller, the removable fabrics can be machine-washed on their own in cold water with mild soap on a delicate cycle, with no bleach, then drip-dried. Chicco manual (PDF)
What does the warranty cover?
Using add-on pads, accessories or products that did not come with the seat voids the Chicco car seat warranty, unless Chicco approved them. Chicco manual (PDF)