Can car be repossessed if pay on the past due amount?
"Pay on" - sure - your still in breach of the payment agreement
and owe the debt - just by a lesser amount. (The lender has the
obligation to do everything to mitigate (that means lessen) his
damages...that would seem to include accepting partial payments
which act to do so.
"Pay off" all amounts due - then no repossession should occur -
there is no debt to be in default of not not paying.