https://autoexpert.com.au/posts/CRACKED
http://www.lcool.org/forum/viewtopic.php?t=50869#:~:text=https%3A//autoexpert.com.au/posts/CRACKED!%2520Hi-tensile%2520bolts%2520Vs%2520chassis%2520Vs%2520dealer%2520incompetence
you will need to highlight the whole last link to see photo's, hopefully not yours, or check all your towbar bolts
Cheers Craig