Sometimes ignitors can last a pretty long time. But at other times, not so much...Don't you worry though! They are fairly inexpensive to replace and ridiculously easy to install onto your barbecue.
If you've got a Broil King barbecue with two leads popping out of the ignitor, then this is the exact part you'll need to get it sparking again. If your grill doesn't happen to be a Broil King, then you should throw it out. Kidding! This ignitor may just be the exact fit for your grill as it is quite the common ignitor.
When installing, be sure to leave the battery out while you change out the old ignitor for the new one. If you don't you could be in for quite the shock! Once the new part is installed and all wires are connected, then put a new battery in.