Any socal BMW mechicanics? Need help with my temp gauge

[R32toE30]

Looking for some help fixing my temp gauge. I have checked the IS board, changed sensors and still it doesnt work. With the summer heat coming up I am scared not know my car is over heating.

Any in the local area that can help. Im in south orange county but meet any where in the socal area.

Thanks

[MR 325]

Could be a dead gauge itself. I'm sure you could pick one up on here pretty cheap.

[ZM Blue Devil]

bolt behind it loose or missing?