Update on this ....
We now have new, hopefully stronger, wishbones - @ well north of £500 for the parts. MMC declined to fulfil their 2012 promise in full or even in part.
Once off the car, it is obvious that besides the cracks, the wishbones are significantly bent (as Steve mentioned).
Would urge anyone with an early car (2011/12 production) to check whether their wishbones are at all bent and, if so, get them properly checked (not least because the level of bending we found will affect steering geometry).
We are now feeling better about our 2026 plans for Northern Spain & Grindelwald with supposedly stronger wishbones....
Happy M3W travels for 2026!
