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

GX470 Popping sound front end.

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Old 04-05-18, 03:36 AM
  #16  
SteveAlex
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Originally Posted by chiph9
"Cushion Sub-Assembly, Cab Mounting"

https://www.lexussouthatlantaparts.c...rimLevel=19100

There's eight different part numbers, and you need two of each (for left/right sides). Prices are in the $30-$60 USD range (each). Consider replacing them all - if you have a couple that have gone bad, the others can't be far behind.

5220135100 front bumper area, upper
5220235090 front bumper area, lower
5220335210 front door area, upper
5220435120 front door area, lower
5220535160 rear door area, upper
5220635040 rear door area, lower
5220735050 rear bumper area, upper
5220835050 rear bumper area, lower

If you have the 3rd row seat option, looks like you also need a pair of a 9th cushion.

5221660010 rear cross-member area

I've never replaced one. There's a nut & washer underneath the vehicle, but I'm not sure if the bolt will stay in place when you loosen it (you might need to get inside the interior panels to hold the other end). An impact driver might be fast enough to where it won't spin - no idea.

Chip H.
This is exactly the info I am looking for, thanks! I can give the technician of the dealer garage some guidance now, after all I am in Nigeria. Probably I will change the front wheel left and right ones first.
Cheers! Will let know how it works out!
Old 04-20-18, 01:57 PM
  #17  
RXstate
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@Lwalters, where did you end up getting one? Did you have the dealer do it or did you buy a wreck?
Old 03-15-21, 01:11 PM
  #18  
harrymanlo
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Default Same problem same number of miles

I made a video as best I could so you can hear it. also attached a couple pictures.




Originally Posted by Lwalters
I have a 2003 GX 470 with 190,000 miles on it. Last week while towing my enclosed trailer 3500 pounds. I heard a popping coming from the front end. I knew I had one of the CV joints boots torn before this so I climbed underneath and noticed that another one had torn on The other side. So I decided to go ahead and replace both CV axles. It is still popping. This only happens under a stop then acceleration. If you’re rolling it will not pop unless you really accelerate. Not sure what it Is worst-case I could think was the differential but when I change the oil there was no substantial amount of shavings in the oil. Could it be a motor mount not sure. Any recommendations or suggestions is welcome.
Old 03-18-21, 07:33 PM
  #19  
atownt42
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I have the same exact problem and sound. My buddy at a Lexus repair shop lifted it and pushed the accelerator to pinpoint the noise and it was coming from the transfer case. They said the chain is slipping as it was probably stretched from overheating. I think the owner before me might have let it dry out and the dealership did a cover up job to repair. I've seen chain and gear replacements for them, but the inside of a transfer case looks very complex. I think my options are a new case for $3K or a salvaged one from a junkyard for about half the price. Guys at the shop said they've only seen this happen 1 other time in 20 years. What route are you taking for your repair?
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