title_body: Espresso Machine: How Old is Too Old?
upvoted_answer: The easiest would be to service the machine. Think of it as bringing your car to the shop or going to a physician / dentist yourself, so a professional can check some things that might be indicative of problems and do some basic maintenance. 
  
  You can try to find a (video) guide for your specific model, try it yourself (with or without a guide) or have it done by some shop.
  
  Generally, you'll want to look for obvious problems like small leaks, rust and mould. Other things you might be able to do is replacing the gaskets that seal of different tubes. For that, you'd need to know which ones you need exactly.