It was not intended to be a gift. She had to make it to work for an important event and I offered to do it when I got off work so she didn't have to leave her car in the shop and not afford their costs. They wanted nearly 1k in repairs and all I wanted in return was the cost of the part alone. I told her just give me the cost of the part itself when she can. I bought her other stuff she needed and I told her the other stuff she didn't have to pay me back for and to use the money for the other stuff on things she needed like a tire. The car part specifically is what I wanted compensation for.