Yes - I have the TrailAir pinbox on my Landmark with the airbag - it came from factory therefore you should not have any issue to warranty if you add the correct replacement model for your coach.
Here is a Lippert (TrailAir supplier) website that you may find useful to figure out the pinbox model needed based on your existing pinbox model.
Brian
Thanks for the feedback. We do not have our unit yet so I cant go look...which pin-box does the 3650RL come with? I am assuming the chassis is a Lippert?
We really liked ours as well and with the shroud on. However we changed to a Goose Box due to the frame issues so we could still use the ball and not have to change hitches.5th airborne here. I like the fact the air bag is protected and also u can still use the shroud.
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We really liked ours as well and with the shroud on. However we changed to a Goose Box due to the frame issues so we could still use the ball and not have to change hitches.