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Technical Topics B48 4-Cylinder Turbo Engine / Drivetrain / Exhaust Modifications ESP issues after stage 1

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      02-25-2021, 07:55 AM   #1
DawnRacer
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ESP issues after stage 1

My RWD 330i is at the workshop currently for stage 1 engine optimisation. It's taking some time and they're telling me the ESP light keeps flashing when they're test driving after the tune is done.

Now they're going to flash it back to stock and try again. They also asked me if I've seen this before or if my winter wheels could be the issue but I doubt that as they're from the BMW dealership and not cheap.

Has anyone else esperienced this?
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      02-25-2021, 11:45 AM   #2
Don76
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I'm running stage 1 tune (bootmod3) and don't have this problem mate.

Mine is the 320i RWD.
The tune on mine takes it from 190bhp to 290bhp.

Sure the ESP light will flicker if I try flooring it in the wet, but not under normal driving conditions
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      02-26-2021, 12:32 PM   #3
DawnRacer
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I got it back today. Gotta say, these guys went to town to try and fix my car. They even took it to their friends at Bosch to look at the ESC components and software but in the end, they couldn't fix it.

Got the car back now and will do some driving this weekend to see if the system either adapts or if I can live with it as is. Might also try fitting the summer tires while the weather allows it and see if that makes a difference.

The ESC definitely cuts in too aggressively, Floor it at 80-90kph on a straight dry road and it starts blinking.

When I turn it off the car goes like stink though, it's a huge difference.
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      02-26-2021, 07:55 PM   #4
VipinLJ
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Mine only blinked when I was on crappy OEM RFTs. Because it broke traction. Not anymore.

OT but do you have a dragy?
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      02-28-2021, 08:45 AM   #5
DawnRacer
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Yeah I'm hoping it's the winter tyres, seems pretty likely.

I don't have a dragy but might get one, I really want to know exactly how fast this car is now.
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