Just be ready for that blower to jump across the bench when you put power to it.

Were you getting vibration at idle in Park and Drive?

I was referring to MrAI's situation where he says he doesn't "drive it that often". In that case a smart charger keeps the charge up and extends the life of the battery. That's better than fully charging it by driving it and then letting it sit for an extended period.

Krons, I assume you are referring to the hydraulic mounts on the front and back of the engine? If so, can you describe the vibration you were getting that replacement solved? In my case I get vibration when in drive and reverse with foot on the brake. In Park I get much less.

Or you could just buy a smart charger that would keep it fully charged at all times.

Are you saying Neil's method doesn't work?

Is this the part? https://www.fcpeuro.com/products/volvo-diaphram-position-sensor-ate-9441116?ads_cmpid=21630011653&ads_adid=165141815886&ads_matchtype=&ads_network=g&ads_creative=710927653130&utm_term=&ads_targetid=aud-2291188443513:pla-1193982685575&utm_campaign=&ut...

I assume your tensioner is compressed?

Could be a bad brake hose.

Probably sounds crazy but worth a try: turn the ignition key to position I and then back off ten times at a normal speed then see if it connects to the SRS.