My friend was telling me how his wife had a flat tire this week. She went to fetch the spare out of the trunk, and it was flat. So she had to call a tow company to come and pump up the tire. I bought my car two years ago. I never checked my spare..out of sight..out of mind! I pulled it out of the trunk and checked the air pressure. It had 43 PSI, the tire should be at 60 PSI. I pumped it up and put it back in the trunk. I will check the spare every six months now.