Guarantors for car financing? (credit, financing) – gutefrage

Hi guys, I want to finance a car. I have a permanent employment contract. But my passport is only valid for another year. So I have someone who can vouch for me. The problem is that the person wants to buy a house in 2-3 months and wants to take out a loan for it. Now my question is, can the person get into trouble even if I pay my monthly installments on time?