Rear passenger suspension dropped, what could be the problem? Hissing air leakag

[celica]

Rear passenger suspension drops over night.
What may cause this, leaking air bags?

It rises fine when the car is switched on.

I’ve replaced it with aerosus replacements just over 2 years ago.
Could it be one of them is now leaking again?

They won’t honour any goodwill apart from 10% off as they are over 2 years.
To be exact I bought these 28 march 2016, so are just over 4 months out of warranty.
Done less than 20k too. Bit disappointed it’s happened again.

[X5Sport]

Spray water with a bit of detergent in it to see where the bubbles are coming from.

[celica]

I’m no good with diy. Can this be done on the drive or up on ramp only?

[JohnB5]

You can do this without lifting the car up.  I replaced both sides without even taking the wheels off.

[celica]

Bit of a strange one

Took it for 100 mile drive over the weekend
It had dropped again the night before and inflated back up before setting off

Since it hasn’t dropped back down as low again, so maybe the air suspension is okay?

What else could cause it, valve or something?

[celica]

So it’s been intermittent this issues
Sometimes come back to the car and it’s fine and sometimes it was dropped

Spent the afternoon loading the car to go to the tip and whilst sorting out the rear 3rd row seats in the car I got back out and heard a hissing air leaking noise. What could this be? Again it is this which is the intermittent problem.

Where and what could be the air leak to come on at times ?

[X5Sport]

See your other thread...