I've searched around for a while already, but couldn't come to a conclusive answer. So here's what is going on - every day (or other day), when I start the car from cold, I can hear the air compressor to the air suspension turn on and adding air to the car. It does this for maybe about 15 seconds, then turns off. Then I'm fine for most of the day. What I can't really tell is if it's really leaking, or if it's just how air suspension works (note this is my first set of air bags). It *looks* like the passenger side rear sags overnight, but I can't tell for sure from just eyeing it, and going over bumps and rough surfaces it reacts just fine.

Going from these small hints alone, what are the chances one of my air bags is leaking? Where can I get a new one on the cheap?

 

First I would determine if there is a leak, and where... At the end of the day, measure and note the heights of your 4 air shocks. Repeat the measurement the following morning to see if there is any changes. The corner parking sensors can be used as your reference points (sensor-to-floor measurements). Once you narrow the leak to one particular corner, the next step is to do a soapy water (bubble) spray test to find the leak. Please note that a leak does not always mean a bad shock.

 

Thanks, that's a good idea. I'll give that a go.

 

Check out Post #3 on the link below...
https://www.clublexus.com/forums/ls-...-ls430-ul.html