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GX - 1st Gen (2004-2009) Discussion topics related to the 2003 -2009 GX470 models

Leaking Rear Air Suspension

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Old 09-02-16, 02:02 PM   #31
gbrowndsl
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With the engine on and hitting the height level buttons you get no compressor noise from the rear of the vehicle? If so, sounds like a good place to start.
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Old 09-06-16, 09:22 AM   #32
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Correct...I get no response, noise or anything. Compressor is gone?
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Old 09-06-16, 12:13 PM   #33
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I know you said you checked fuses, etc. But did you put a voltmeter on the air compressor leads and have someone change the height from Lo to High? (have a pair of jackstands under there for safety)

Chip H.
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Old 09-11-16, 08:34 AM   #34
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Sounds like compressor is done if fuses etc. are all fine.
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Old 04-07-17, 03:07 PM   #35
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The exact same problem on my 2003 GX470 with 150,000 miles. Last week after parking the car in the garage I heard an air leak coming from the rear right. In approximately 2-3 minutes the entire back end was lowered. I took it back out for a drive and the compressor would fill the lines again but the same thing would happen after it was parked, the air would leak out. However, there were a few times that I would park it and it wouldn't air out. I took a look under the car and was obvious it was coming from the air spring assembly. After going back and forth with replacing the air spring assemble with coils, I decided to take a chance and buy the 2 new air spring assemblies off Amazon. Link
https://www.amazon.com/gp/product/B01LY8EMWY/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1 https://www.amazon.com/gp/product/B01LY8EMWY/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1
for $200. I bought both but only installed the failing side. I will hold on to the other one until it goes out. Lexus wanted $1,600 for one side.
Simple Install
Remember
1 - Take the top clip out with long needle nose pliers. After you take the tire off, you can see the clip between the frame and fender wall. Pulls right out
2 - To remove the existing air line from the old air spring assembly, I used the tip of a caulking tube slit by the middle to go over the air line. Simply put it on the line and push in to the fitting and it will release the air line. You can also buy the Special Service Tool for around $60 but the caulking tip works great.
3 - The new air spring assembly comes with a new fitting where the air line plugs in. It also comes with the new O-rings and plate already installed. So this is plug and play
4 - When re-installing the new air spring, have someone help you hold it up to install the airline in the fitting. The space is very tight and the air line is very short.
5 - It took approximately 1.5 hours to do one side.

Rides great again. I am glad I stuck with the air ride instead of swapping for the coil kit. Good luck everyone and hopefully this saves someone money.
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Old 05-29-17, 05:50 PM   #36
SC3coupe
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Thanks for the info on how to change out the bags. Did you have to jack the rear axle (rear end) up and down to install the bag. Or was the whole rear end on jackstand and compressed during the whole removal and installation?

Quote:
Originally Posted by EJMEYERCO View Post
The exact same problem on my 2003 GX470 with 150,000 miles. Last week after parking the car in the garage I heard an air leak coming from the rear right. In approximately 2-3 minutes the entire back end was lowered. I took it back out for a drive and the compressor would fill the lines again but the same thing would happen after it was parked, the air would leak out. However, there were a few times that I would park it and it wouldn't air out. I took a look under the car and was obvious it was coming from the air spring assembly. After going back and forth with replacing the air spring assemble with coils, I decided to take a chance and buy the 2 new air spring assemblies off Amazon. Link https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1 for $200. I bought both but only installed the failing side. I will hold on to the other one until it goes out. Lexus wanted $1,600 for one side.
Simple Install
Remember
1 - Take the top clip out with long needle nose pliers. After you take the tire off, you can see the clip between the frame and fender wall. Pulls right out
2 - To remove the existing air line from the old air spring assembly, I used the tip of a caulking tube slit by the middle to go over the air line. Simply put it on the line and push in to the fitting and it will release the air line. You can also buy the Special Service Tool for around $60 but the caulking tip works great.
3 - The new air spring assembly comes with a new fitting where the air line plugs in. It also comes with the new O-rings and plate already installed. So this is plug and play
4 - When re-installing the new air spring, have someone help you hold it up to install the airline in the fitting. The space is very tight and the air line is very short.
5 - It took approximately 1.5 hours to do one side.

Rides great again. I am glad I stuck with the air ride instead of swapping for the coil kit. Good luck everyone and hopefully this saves someone money.
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Old 06-05-17, 11:28 AM   #37
EJMEYERCO
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I jacked up the frame using jack stands. The rear end will drop and the air bag comes right out as soon as you remove the top clip.
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Old 08-20-17, 08:55 AM   #38
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Hi all
thank you ,you always been very helpful
I have 04 rx330 with air suspension,,it functions fine until shutting down the engine,,the front passanger wheel will go very low,,from reading here it looks that the bag is leaking,,is that correct?
For replacement is that the only bolt going to the hub?
Are the bags the same for all corners?
thank you
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2004 , 470 , air , airbags , gx , gx470 , hose , leak , leaking , lexus , location , rear , shocks , suspenion , suspensiom , suspension

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