Temp Gauge Help

I recently purchased a 2004 Tacoma and noticed that the temp gauge fluctuates from time to time. The majority of the time it stays just under half, but will creep up to half or just above half. It never goes any higher, but not sure why it continues to do this. I have had the coolant, thermostat, and water pump (leaking) replaced by Toyota and they said I am good down to -35 to -40. Not sure if I need to worry about this or not. Any help would be appreciated. Thanks.

Note: I used to have a 2003 Tacoma V6 TRD and the temp always stayed just below half.

 

My '04 V6 is almost in the same spot, but actually just a bit higher. I've researched this issue only to really find that these gauges are not very accurate.
The only way to see what your true temp is, would be to plug into a Scan Gauge or stop by a local shop and have it plugged in and see what your running.

I've always figured if my fan isn't on, I'm in the "NORMAL" range. I wouldn't worry too much. It's hard not to focus on the damn thing though!!

It is possible that you may have some air in your cooling system, causing a air bubble. It's doubtful though, are you getting good heat??

 

I am definitely got a good heater That thing will make my face and hands burn.

 

Actually the fluxuation is when your Thermostat opens up and sends coolant to the radiator. Older cars did this all the time. Maybe you have a sensitive gauge.

 

Ok that rules out excessive air in the system. Thinking your gauge is just off like all the rest.

 

You may have a higher temp thermostat in there if your heater works extremely well. Some people swap to a hotter thermostat in winter to get more heat.