If I were your awesome friend, I would know it was only a matter of time. Yeah, I probably wouldn't be happy that it died, but I definitely wouldn't blame you, especially if the only reason I kept the vehicle was so I could loan it to friends in need. If it really is dead or in need of expensive repairs, I would probably not bother having it fixed, but that's just me. Your friend may feel otherwise. You could always offer to give her some money at some point in the future when things aren't so tight. Right now, you can't give what you don't have.