EJMEYERCO

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. The ride was very rough, more noticeable on the street than on the freeway. 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 assembly with coils, I decided to take a chance and buy the 2 new air spring assemblies off Amazon. Link 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.