In all honesty, if this is a question you've been pondering on, the likely answer is 'yes, yes you do, please get it replaced'. Not in every case, of course, but it's likely. But if this is a question you've been thinking about, your windshield is damaged, but you can still see through it, most likely. Right? If it's absolutely shattered, you should get it replaced, but you've likely already sussed that out.