ETA Here's the actual hazard, looks like it's on car seats from 2014 and 2015 and its on the handle. Britax has received reports of cracks developing in and around the carry handle grip on certain B-Safe 35 and B-Safe 35 Elite infant car seat models. If the cracks lead to the handle breaking, then the seat could be dropped, causing potential injury to the infant.
Re: Britax B Safe 35 car seat recall