only way to make a good assestment on the condition of the housing is to remove it really.
It's only a few pins and you wont lose that much coolant by removing it. Mine has been replaced a number of times by the previous owner with none genuine parts, and since me purcahisng it i've had to replace it once.
I've only done 2 trackdays since this and maybe 700 miles on the road. No issues at the moment.