Invest in this car or get another one?

I have a 2003 VW Beetle. And I have put about $3,000 in repairs into it in the past year and a half. It's back in the shop and now needs two new sensors (coolant and nok), something like an evaporation purge filanode and valve, new bearings, needs the sunroof frame replaced and two new tires. I'm at my wits end and feeling like it might be a better option to get a newer car instead of continuing to invest so much money when I could be paying a lease on a newer car. This trip alone is going to cost me about $2000. What is your advice?