The Peg-Perego YPSI stroller is compatible with all 2018 and newer Peg-Perego Infant Car Seats.
The Peg-Perego YPSI is also compatible with the Agio line of Primo Viaggio 4-35 infant car seats as they are made by Peg-Perego.
How to use the Peg-Perego Infant Car Seat on the Peg-Perego YPSI
To attach your Peg-Perego Infant Car Seat to the Peg-Perego YPSI, you will use the included "links", a set of two small posts with a red button included with purchase of your stroller. If using your YPSI stroller as a double for twins, you will need to purchase an additional set of links, as well as the YPSI Double Adapters, to attach two car seats at once.
Please note these adapters will only work on Peg-Perego infant carseats manufactured in January 2018 or later, an older car seat model will not "click" securely onto these adapters.
To attach the car seat to your stroller, place the adapter marked "1" on the left side of the stroller (when standing at the front of the stroller near the smaller wheels), and place the adapter marked "2" on the right side. Then lower the Primo Viaggio infant car seat onto the adapters so baby is facing the handle of the stroller, until you hear the adapters click into place.
To remove the car seat from the stroller, lift adapter tab "1" outwards so it stays in place, then lift adapter tab "2" out while lifting up on the car seat handle. The adapters will stay on the car seat once installed, so there's no need to remove the adapters when transitioning between the car and the stroller. If you need to remove the adapters from the car seat completely, just press the grey release button on the back of the car seat and the adapters will detach.