According to Golf Channel [4], changing your driver is related to the frequency of use; that is, how often you use the driver.  It is advisable to replace your golf driver every 5 years if you consistently play 30 to 40 rounds a year (what we can call reasonable use of the driver).  If you play less than 30-40 rounds every year, then you should replace your driver every 6 to 7 years, depending on how much wear and tear your club undergoes. If you play more frequently (Over 40 rounds a year), your driver (and clubs in general) are more likely to undergo a lot of deterioration. That's why it is recommended to replace the driver every 4 to 5 years. Please note that the periods we are talking about here are for replacing the whole golf driver. During that period, you need to frequently and regularly clean and re-grip your driver (and clubs) to ensure optimal performance. A general rule of thumb is that golf club grips should be replaced every year for regular use (around 40 rounds). Of course, playing more often requires more frequent grip replacements, and playing fewer rounds means less re-gripping.