Hey, I know this is an older thread, but there are ways to fix this economically. I had the same issues, sagging front end. I bought RMT remanufactured struts and installed. After installation I calibrated them using the autotel
scanner that connects via bluetooth. That
scanner can be set to region-specific and car specific. I was able to inject air with my craftsman air compressor (which is essential)d, just make sure you use the correct port and calibrated my tires/wheels just like they do at the dealership. Really the most difficult part of the job is separating the ball joints. Everything else is a piece of cake. Really not a tough job at all. If you have a dual point leak down (front driver and front passenger) I doubt it's a solenoid. Usually, one or both of the struts have failed. I inspected my old struts and aside from the old accordion cover being brittle, I couldn't find any leaks. The air suspension is extremely simple - air goes in and without leaks, the struts shouldn't deflate. If they deflate, then you have a leak and that's where the fun begins, chasing the leak. But 10 out of 10 it's the struts that go bad. Again, buy a pancake compressor, get the right fitting and you'll fix in no time.