Fitted a replacement blower motor on the E92. The old one (which was obviously a cheaper aftermarker part) packed up and didn't work on any setting just over a week ago, although I suspected something was up for a while because some days it would make a quiet rumbling noise.
On removal of the old one, I found that it would bind up as I tried to spin it, so it likely had no chance of moving properly under its own steam. Sprayed some WD40 on the bearings on the replacement Denso unit to extend the life of it, swapped the final stage resistors over and fitted it. Instant cabin air back again, just in time for 20c+ this week. I gave the old one the same WD40 treatment and left it overnight, and it spins the same as the replacement part now, so I'll keep it as a spare even though it may just be properly dead, but I'm not playing contortionist under the dashboard again in order to test it.
Could do with adjusting the handbrake as well, but it is a job I never liked doing on the E46 because it felt a bit like luck of the draw striking a balance between having a decent handbrake while not having any binding with the handbrake off.
