Originally Posted by Shinobi-X

So after dropping some fair weight from the suspension, I decided to purchase the 2012 steering ECU. I've seen a few people here and there do it, but not much feedback from the F crowd. I purchased my ECU through Sewell, part #89650-53041 (the previous unit is 89650-53040).

Installation: This was pretty straightforward and the easiest part of a rather stress-free process. It involves removing the battery and battery tray, which reveals the steering ECU just beneath it (images below). You then have three bolts and three connectors to remove, before pulling the ECU and reversing the process to install the new one. No additional parts or any modifications were necessary.

Calibration: I purchased mine new, so it didn't provide any assist out of the box. It's possible other steering functions could be affected, so for this very reason I'd highly recommend doing this at your dealer or somewhere you can get access to a Techstream and/or a person who knows what they're doing.

I happened to be at my dealership with one of the awesome techs willing to volunteer his time. He plugged in the laptop and had to clear a few aspects of the cars memory, before going through a process detailed in the software. This involved an illumination of the steering dash-light (which was normal), some manual 90 degree turns and centering of the wheel, a period of steering "vibration" (wheel turns itself under computer control), and a nice confirmation to signal all went well. It really is a simple step-by-step process where you read instructions and just hit "next".

The drive: The car feels incredible and has a very distinct feel, much nicer than the 53040 unit. I'd really like to get away from the idea of it being "heavier", because it's plenty easy to manage in low speed situations, especially in normal mode-- however, it's definitely more tactile in its feedback, resists irregularities in the road more confidently, and dials out the assist more rapidly and favorably as speed increases. In sport mode, the wheel firms up nicely and the car feels that much more assuring, as it seems to communicate what's going on with the car that much better, magnifying the above. Previously, I felt the steering was somewhat numb/disconnected at or during small degrees of steering input from center, but the 53041 ECU completely rids the car of this, and it's very confidence-inspiring. Most of all, it's just very fun to place the car where I want it, while feeling it transition.

This is how the car should have came from the factory. Period. If the suspension upgrades in later years do as much for the real-world performance, as this does for feel, then I have to say I'm very impressed by Lexus' continued refinement of the brand.

Originally Posted by torxuvin

606$ at sewell. I think I would have to test it out before considering...

Originally Posted by Rossi

- 30% clublexus discount :-)

Originally Posted by Andyfishy

Questions....

I'm driving a 2009 ISF and I'm a noob about the steering ECU & the LSD (Limited Slip Differential).

I wanted to ask if the 2011+ Steering ECU will work on my car?
If so, how is it going to work? Where can I order it? Is it a hard to swap the ECU? Anybody tried it already?

Sorry for my poor English because English is my second language haha..

Thanks guys

Originally Posted by Rossi

Please post some feedback after the install.

Originally Posted by Shinobi-X

The steering ECU will work in your car and offer a much improved feel. Given the steering is the primary way you interact with the car, I consider it to be one of the better changes you can make, especially since it's all factory. Rossi posted the details, but feel free to also read the thread for a bit more info.

https://www.clublexus.com/forums/is-...it-2010-f.html

Relatively speaking, it's cheap and you can sell your old steering ECU, since it's an upgrade for ISx50 cars. Altogether, the swap was under $300, which is a no-brainer considering the cost of some other mods.

Originally Posted by Andyfishy

Thanks man, will see how it goes after installing it tomorrow

Originally Posted by Andyfishy

Anybody knows how does the aftermarket LSD work? Hard to install? Any modification to the ecu needed?

Originally Posted by Shinobi-X

Sounds good.

Which part number did you go with, 53041 or 53042?

Originally Posted by ilv1004s

as a person whos done this
yes the MY11+ Steering ECU is a straight swap
and no the LSD doesnt need any modifications

no ECU modification for the above mods

and for any ISX50 owners the ISF ecu works straight
the car isnt that complicated as some members think it is
its mostly hardware not software

Originally Posted by Andyfishy

Thanks, how about the OS Giken TCD SUPERLOCK LSD on Figs?