Who is responsible for paying off the loan, the estate, or me as an individual who is the beneficiary?

My mother passed away and left me her vehicle in her will. Her estate has been set up through probate, with all other assets (except for the vehicle) split equally between my two brothers and me (all named co-executors of the estate). The vehicle currently has a loan attached to it. I was neither on the original loan, a cosigner to the loan, or co-owner on the title. My brothers have misused the liquid assets while fixing up her house, and the lawyer is telling me I need to pay back to the estate the payments I made as co-executor of the estate for the automobile from the joint estate account (my brothers refused to pay the loan from the estate account due to a personal conflict of them not receiving the car in the will).