Have a 2017(4M) Prestige with adaptive air. OE suspension is probably getting to around 85% of useful life. Already had to replace the valve block.

Wondering if anyone has had to replace an air spring or compressor?

The OE components look crazy expensive. Like 1600 a spring. See some options like Unity, Suncore, and Westar.. all for a small fraction of the OE cost... Has anyone had experience/luck with any of these?