2006 Dodge Charger Overheating

I decided to replace my thermostat and temperature
sensor gauge to see if it would fix the problem and
it worked. I spent less than $50 for the parts and a
new jug of coolant.  I did it myself by watching
videos and following the steps. I am not a
mechanic, but was tired of the dealer telling me I
needed a new engine and two other smaller shops
could not figure it out either. My temperature gauge
doesn’t bounce around anymore any rise up like the
car is overheating. It stays where it should and the
car runs perfectly. It’s been 8 months since I
repaired it.