Why order the bushing separate and press it in when you can get the
RC F/ GS F bushing LOWER CONTROL ARM BUSHING 48075-24010 & 48076-24010??

also are we useing the RC/F GS F bushing over the IS350? 48076-30030 & 48075-30030

 

Because none of those bushings are oil filled or correct for the LS430. Buy a cheap bushing if you want your LS to drive like an IS.

Those also are aluminum brackets. The LS uses steel brackets.

https://bit.ly/LS430-LCA-Bush

 

Are you able to verify this?
If so, please do.

 

I thought the aluminum (GS brackets) were an improvement/upgrade?

 

I read the link above and apparently the oem bushings are oil filled. Mine must have been torn for a long time before I replaced because I saw no evidence of any fluid at all. Have no idea if ones I bought have oil in them.

 

I will try to find a set of the aluminum bracket version and drill into them to prove or disprove the theory.

The rubber has to be a different hardness or composition either way. They are known to flex a ton even on a stock IS or IS-F. This leads to massive inner tire wear. This is well documented in the IS forums which is why they ditch the aluminum bracket bushings entirely and install the polyurethane version from Figs or RR Racing.

There's no way Lexus would sell the "same thing" for completely different prices.

Something is significantly different between the two. An entire OEM aluminum bracket with bushing is only $97. Just the (known) oil filled bushing for LS430 is $193

 

I thought the replacement bushings were from a GS not an IS. The IS is a much smaller/lighter car than the LS where the GS is a somewhat larger/heavier car but not LS size.

 

48076-30030 = AWD: IS250/350, RC350/300/200T, IS250C, GS, GS450H

48075-24010 = RWD +/-0 degree offset for RCF/GSF

48075-30020 = ISF 0 offset
48075-53020 = ISF +20 offset
48075-53030 = ISF -20 offset

LS430
48652-50030 no mark bracket
48652-50040 - white mark
48652-50050 - pink mark

That's why it's recommended to just press the new bushings in because there are 3 different brackets for LS430

 

When I asked if you could verify the "none of those (non LS) bushings are oil filled..." statement, I was looking for more than just assumptions and opinions.

"The rubber has to be a different hardness or composition..."- assumption
"They are known to flex a ton..."- it's a bushing, and still an opinion. Maybe it's the nature of IS owners' driving style. Maybe it's the tires...?
"There's no way Lexus would sell the "same thing"...- assumption rooted in US Lexus Dealer pricing structures*

Fact- The 48076-30030 bushing (as an example) was used on 20 different Lexus models and 3 Toyota models, dating back to 2006, and as recently as 2024.
Assumption- If the bushing caused such a widespread issue on the IS models, it likely would be a known issue across all the models. It's hard to say if it has been changed as a result, as there is only one superseeding part number.

A higher price doesn't guarantee higher quality.
*Yes, the LS bushings are priced higher by US-based Lexus dealers. However, all the aforementioned bushings, including LS, are available from Japanese direct sellers for $19 to $24. (Amayama, Impex, etc.)
The LS bracket, empty without a bushing, is an anomaly in and of itself. Bell Lexus currently has it priced at $115!

At the end of the day, none of this answers the question if the non LS bushings are hydro filled or not.

 

Thinking about this when I replaced I looked at it flexed and rubber opened up some and could see between cracks and looked like solid rubber. Mine is 2001 UL if that makes any difference.

 

Happy to report the new style GS-F / RC-F bushings do have oil inside. However, when working on customer cars and refurbishing our LS430 fleet we would always use the heavy LS430 steel LCA brackets and press in new LS430 bushings. These brackets are made specifically for the LS and the aluminum brackets hole alignment, sizes, and other geometry may not match exactly to the steel LS430 brackets or position the control arm exactly where it should be. Keep in mind there are three different part number, color coded steel brackets that were fitted to the LS430. It's best to keep the steel brackets and install new bushings. Would be interested in long term testing on the aluminum brackets so see if there is any accelerated inner tire wear, or if the bushings wear out faster from anyone that had them installed for 50k - 100k+miles.