Temperature gauge

[Soretech]

I have just installed a water temperature gauge in my 2003 v35 and when I turn the engine on and let it get up to temperature the gauge continues to go up to 120° even though the factory dash gauge stays in the middle. 
 

is this a dodgy aftermarket gauge or is the engine overheating and not displaying it?

[Nightcrawler]

How/where did you install the sensor, or is it electronic?

[Soretech]

Pic 

[Soretech]

2 hours ago, Nightcrawler said:

How/where did you install the sensor, or is it electronic?

In the radiator pipe to the right of the coolant reservoir 

[sonicii]

The factory gauge is set to show around about half way for a range of 'normal' temperatures, so it isn't likely to move between say 70deg and 110deg C, but 120 is getting rather hot, I would expect to see the gauge start to rise above the normal range.

might be worth checking your new electronic gauge. maybe drop it in a pot of boiling water and confirm it reads around 100degC.

If your car really is reaching 120degC, then you have an issue that needs to be investigated.