Hello i recently bought a 2003 Lexus Ls 430, it has 160k miles interior is mint exterior has some minor flaws, however i bought it as a fixer upper knowing the cost of the air suspension..
When i bought it, it was known that the rear left ( driver side rear) air bag would leak down when shutting car off, i assumed the bag had a leak or a line, but now both sides wont air up they are both completely deflated, i know the compressor is working because the front is good and i hear the compressor running, The car is very bouncy and the back is so low, a few days ago before this happened i noticed the back was airing up high on "normal", and high was extremely high on "high" mode, in need of help and advice thank you

 

Seems the struts are toast, but also want to check for any leaks in the air lines. New struts can be ordered from Impex Japan at 1/3 of their US cost. I would lean toward replacing both rear air struts. I just did this exact job and the bounciness and jarring ride is totally gone…it’s much smoother now.

 

yeah I mean I was driving and felt the car go down, only thing is how come both went out at the same time, I know one was leaking but how come they aren’t airing up now

 

I would have your mechanic check the air lines for any leaks too, but the bounciness means the struts are blown internally (even if no oil leak is visible). The hydraulic damping only lasts so long and then the ride goes to hell. It sounds like you might have an air leak in the system somewhere in addition to the struts being bad.

 

Check the rear distribution block as well. That distributes the air between the 2 rear struts and if there is a leak there, both rear struts will drop.

 

where is that located? Do you have a picture I searched it up and couldn’t find it

 

https://www.japan-parts.eu/lexus/us/...veler/1#48095D

 

The box with number 48096 top centre in that diagram.
48096 VALVE SUB-ASSY, HEIGHT CONTROL, NO.2
Part number 48096-50040 for a 2004 LS430.

 

I’m sorry but I’m having a hard time understanding that diagram I’m not sure where it is, is it under in the wheel well?

 

I suggest you get under the car and follow the air-line from the strut back to the valve.
It's forward of the rear subframe in the middle of the car.

 

UPDATE: ok so I did find the rear junction box thing, I also found a line leaking bad so I fixed that, still have a small leak from what seems to be the junction box in the rear underneath. I’m not sure if it’s the air line seals I sprayed soapy water but didn’t see any bubbling, and I don’t have the proper tool to remove the lines and I also can’t seem to find the seals anywhere. The rear is going up on one side a little bit but it seems like the leak isn’t allowing it to fully go up, air bags are inflating but not enough.
Anyone know where I could find the air suspension line seals?
My plan is to replace the seals where the air lines connect, if that doesn’t fix the leak I’ll replace the junction box underneath.

i also need the front airline seals as I hear it leaking from there to

 

If you mean the O-rings then they are on the parts diagram. You will have to find your year/region to get an accurate part number.
This is the parts page for my 2004 (UK) model.
https://lexus-europe.epc-data.com/ls...color=8P8&trim

 

Yes I replaced the o rings and lines for both rear bags, driver side rear goes up on start up but leaks down slowly, passenger side doesn’t go up, I still hear a leak from the rear junction box or the metal line having a hard time finding the exact leak, if that doesn’t fix it do you suggest replacing the airbag/strut?