Update: It turned out to be the power steering pump - it was almost completely dry. I had visually checked the fluid level from the outside of the reservoir - which was about 5mm below minimum - and had intended to fill it up, assuming I lost a small amount leaving the PS lines disconnected while re...

Out of your list of things to replace on the 3.2, I have replaced: Driver side engine mount. Others look to be replaced at some point. Spark plugs Aux belt, idler, tensioner. PS fluid "flushed" lol. Battery ATF fluid replaced using gibbons but not as completely as could be. Brake fluid Coo...