Slowlane

Good info, thanks for sharing, l've got a 2012 ISF and pretty happy with the steering feel. I'll stick with it.

MileHIFcar

For sure you got the good upgrades from the factory!😉

LILEVO

iTrader: (1)

The 89650-53042 (2013-2014 only) is also like a 2-3 month special order from Japan. I ordered a couple back in late December. One should be arriving in a few weeks, the second sometime in March. Not sure if they had to make them from scratch or what.

MileHIFcar

Hmm...😣 From the link I posted @ Discount Parts Monster they had them in stock and shipped out about 4-5 days after I placed my order🤷‍♂️

LILEVO

iTrader: (1)

Oh from there maybe. I used the super secret place in Canada that has them for like $385 USD

https://www.lexuspartsdirect.ca/p/Le...965053042.html

MileHIFcar

Ahh yes Canada has them for super cheap👍 unfortunately they wouldn't ship to Colorado so I had to pay the tax here

Joe Z

iTrader: (10)

For cliff notes... What would MY08 benefit from updating to the -42 last unit???

89650 COMPUTER ASSY, POWER STEERING
89650-53042

Production dates / part #s
- STEERING ECU

89650-53040 (12/2007 - 07/2010)

89650-53041 (08/2010 - 07/2012)

89650-53042 (08/2012 - 07/2014) end production of IS F




@illwillem

Guess I'm adding to my list modding while stuck at home !!!

The RC F Torsen LSD update was a Fun project / upgrade

Joe Z

LILEVO

iTrader: (1)

Yes, either -41 or -42. There's nothing "wrong" with the -41 unit on my 2012, but I've never driven an 08-10 or a 13-14 to compare. So easiest for me is to just swap in the -42 unit for a direct comparison.

LILEVO

iTrader: (1)

2013/2014 ECU installed, videos below. VERY impressed and happy with the ECU.

2012 ECU (includes suspension comparison because I also upgraded to 2013/14 suspension)



2014 ECU video

MileHIFcar

Glad you like the -42 steering ECU upgrade! definitely made a difference on my car as well, but I went from the -40 to the -42 so it was very noticeable😎

lobuxracer

iTrader: (2)

Same here. Huge difference with 255's in front.

jdmSW20

iTrader: (12)

Kinda been following this thread and I might have to put this on my "to do" list. Been looking for things to do to refresh the car some, the 08 could definitely use some love/small upgrades. Good info you guys