Try putting your car in diagnostic mode -while car is off do three quick presses of the start button with no foot on brake pedal.
I believe with this car you have to have your car in the Diagnostic mode to check the CEL and reset it - I might be incorrect though.
What car was it that was trying to race you? What year is your supra?
I had some instagram zoomer run up on me like that in traffic and downshift and then goose it, then he started honking like it was some BabaYaga YouTube video and I just smiled and waved and didn't do a thing while the goober...
All i want is the new Supra bumper to look like the new M3/M4 (sarcasm)
https://www.thedrive.com/news/40063/chinese-bumper-kit-makes-your-old-bmw-look-like-the-new-bucktoothed-m3
Here is where i read something about the F90 M5 axles - another member on the forum, which is not saying much (no offense to original poster).
https://www.supramkv.com/threads/a90-supra-engines-and-parts-diagrams-all-revealed.1404/page-4#post-27678
I did my own digging:
BMW Z4 M40i rear...
I remember reading that this car uses axles that the previous generation BMW M5 did - i'll have to track back where I found that it post it here.
For the folks reading this, remember that if you upgrade the axles, then you are passing the stress down the line to the differential.
If they do...
Not sure if it has been metioned yet in this thread, but wait until some of the CA folks see that they are scanning your ECU for the proper OEM Checksum...
Also, I was surprised on how loud the Supra exhaust is in Sport Mode in a stock car at low RPMS....the car really doesn't need an...
I always try to be nice and say thank you sir, etc...regardless if its an older guy or younger guy...never know when they will see the car again and mess with it or something stupid.