Hess97

So after I replaced my gearbox light the D4 on the dashboard had been working perfectly, not sure if they were related; however right after the fix it worked perfectly for about 3 months. Now the D4 light plays hide and seek with me. After like 25min of driving it will pop on. Sometimes it will go off again during the ride and sometimes it will stay on until I turn the car off. And mostly never on when I start the car back up. Should I just take out the cluster and replace a bulb? Any help would be appreciated.