score:4
You have been provided incorrect information. It is a US legal requirement that all passengers need to collect their bags on arrival in the US and carry them through customs. There are a small number of exceptions for passengers who are connecting in specific airports, but only when connecting to another international flight out of the US.
Your bags will be tagged all the way to your final destination, but this does not change the requirement to collect and re-check them at LAX. The full process will be :
All of this is is doable in the 100 minutes you have - presuming your inbound flight is on time and the queue at immigration is not too long. If you do miss your connecting flight, United will move you to a later flight free of charge, although when that flight might be will depend on availability of seats on later flights.
If you do leave your bags and go directly to your connecting flight it is likely the bags will eventually be re-united with you, but it will likely take several days, will require you to fill in customs paperwork (as they will be going through customs unaccompanied), will most likely result in your bags being opened and inspected by customs, and may involve a charge from the airline for delivery.
Upvote:-1
You will definitely need to pick up bags and recheck them in LAX. I know this isn't really helpful at this point, but in the future, give yourself a bit more time. The stress is just not worth it. π¬