Luxury to F-sport steering/avs ECU conversion
#1
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Hello everyone!
I want to buy used GS350 AWD '12-'13 and I'm choosing between 2 cars (both AWD) - one with the Luxury packet, another with the F-sport package. I really like the car with the Luxury packet more (color, complectation, mileage), but the car with the F-sport packet handles better! And handling is important to me, as for the past 7 years I drove sport-tuned Infiniti G35x '08 sedan, sometimes going to track.
I investigated, that Luxury and F-sport cars have the same spring and shock absorbers (part-numbers match), but they have different ECUs for steering and absorber control (part-numbers are on the pictures).
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I beleive, these ECUs contain "special F-sport tuning", so in sport s+ mode wheel gets harder and shocks stiffer. The same thing is done retrofitting IS-F steering ECU to the IS250/350.
ABS/VSC ECU is the same, but maybe the main ECU would need some F-sport tweaks (though, I couldnt find the main ECU on schemes and check the partnumbers)?
I want to buy used GS350 AWD '12-'13 and I'm choosing between 2 cars (both AWD) - one with the Luxury packet, another with the F-sport package. I really like the car with the Luxury packet more (color, complectation, mileage), but the car with the F-sport packet handles better! And handling is important to me, as for the past 7 years I drove sport-tuned Infiniti G35x '08 sedan, sometimes going to track.
I investigated, that Luxury and F-sport cars have the same spring and shock absorbers (part-numbers match), but they have different ECUs for steering and absorber control (part-numbers are on the pictures).
![Name: HgQQvel.jpg
Views: 242
Size: 75.4 KB](https://www.clublexus.com/forums/attachments/gs-4th-gen-2013-2020/492744d1683159234-luxury-to-f-sport-steering-avs-ecu-conversion-hgqqvel.jpg)
![Name: 9ydXljA.jpg
Views: 234
Size: 121.5 KB](https://www.clublexus.com/forums/attachments/gs-4th-gen-2013-2020/492745d1683159234-luxury-to-f-sport-steering-avs-ecu-conversion-9ydxlja.jpg)
I beleive, these ECUs contain "special F-sport tuning", so in sport s+ mode wheel gets harder and shocks stiffer. The same thing is done retrofitting IS-F steering ECU to the IS250/350.
ABS/VSC ECU is the same, but maybe the main ECU would need some F-sport tweaks (though, I couldnt find the main ECU on schemes and check the partnumbers)?
Last edited by harp00n; 05-24-16 at 02:32 PM.
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jonathancl (08-09-24)
#3
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Well, I searched all the topics here about Luxury vs. F-sport differences and found the video from the official Lexus presentation that on F-sport models (both RWD and AWD) adaptive suspension works differently (faster, though a little bit stiffer) than on Luxury models. And some people wrote, that steering is stiffer too on F-sport models (in S+ mode).
#4
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Lexus' brochure specifically mentions "F-sport tuned AVS" compared to the Luxury package only having "AVS." i.e. I agree you're on to something, though I haven't yet heard of anybody who's done that swap nor what the exact differences are.
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jonathancl (08-09-24)
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#8
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I did it. Replaced my 2013 Luxury AVS ECU 89243-30200 w 89243-30210 that was $50 on ebay.
My quick test drive was enough to confirm no errors or issues on changing modes but too much traffic to validate any meaningful change.
My quick test drive was enough to confirm no errors or issues on changing modes but too much traffic to validate any meaningful change.
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bclexus (08-16-24)
#10
Lexus Champion
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Anyone know where this Steering ECU is? I looked under the Hood and could not find it anywhere? Is it underneath the engine bay, or inside the car? ![Confused](https://www.clublexus.com/forums/images/smilies/confused.gif)
Is it up under the pass side glove box?
https://www.mylparts.com/oem-parts/l...ule-8924330211
![Confused](https://www.clublexus.com/forums/images/smilies/confused.gif)
Is it up under the pass side glove box?
https://www.mylparts.com/oem-parts/l...ule-8924330211
#12
Lexus Test Driver
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
Anyone know where this Steering ECU is? I looked under the Hood and could not find it anywhere? Is it underneath the engine bay, or inside the car? ![Confused](https://www.clublexus.com/forums/images/smilies/confused.gif)
Is it up under the pass side glove box?
https://www.mylparts.com/oem-parts/l...ule-8924330211
![Confused](https://www.clublexus.com/forums/images/smilies/confused.gif)
Is it up under the pass side glove box?
https://www.mylparts.com/oem-parts/l...ule-8924330211
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bitkahuna
GS - 4th Gen (2013-2020)
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06-20-12 02:01 AM