Hi Guys,
My 2007 RX 350 has a slight but regular coolant leak...have done a visual of hoses under the bonnet, but nothing noticeable.

Seems to be no leaks around the valley plate area... usually a go-to issue from the bit of research I've done on this site.

Under the car the coolant seems to be pooling around the rear area where the sump bolts on to the engine casing. Photos are not great, but give you an idea.




Any help would be greatly appreciated!
Thanks.