Drivetrain malfunction

ambletx · 07-24-2020, 02:14 PM

Car is back and running great. Here's the service report on my issue.

A Need For Speed · 07-24-2020, 03:23 PM

Quote:

Originally Posted by ambletx

Car is back and running great. Here's the service report on my issue.

Bad plug/coil. What do me and Aronis win?

ambletx · 07-24-2020, 03:55 PM

Quote:

Originally Posted by A Need For Speed

Bad plug/coil. What do me and Aronis win?

I suppose that’s part of the problem. However, what caused this to happen is right here “Aluminum corrosion in the charge air intercoolers, or in the radiator for the low temperature cooling is causing an unfavorable chemical reaction to the coolant. Caused overflow to cyl 3, consequential damage failure of coil and spark plug.”

A Need For Speed · 07-24-2020, 08:02 PM

Quote:

Originally Posted by ambletx

I suppose that’s part of the problem. However, what caused this to happen is right here “Aluminum corrosion in the charge air intercoolers, or in the radiator for the low temperature cooling is causing an unfavorable chemical reaction to the coolant. Caused overflow to cyl 3, consequential damage failure of coil and spark plug.”

cooked the coil/fouled the plug. Pay up.

BTW was just kidding. Lighten up Francis. Glad they fixed it.

ambletx · 07-24-2020, 08:13 PM

Quote:

Originally Posted by A Need For Speed

Lighten up Francis.

N-Dorfin · 07-08-2021, 06:59 AM

Mine M5 was going into limp mode after kickdowns as well (diagnostics said misfires on cylinders). Turned out, it was the same problem - corrosion on coils due to a leak of coolant... BMW under warranty replaced all coils and spark plugs. Now I did around 500 miles, tried several kickdowns and everything seems fine now

...

Mrjetsetlife · 08-02-2022, 11:22 PM

Do you remembered how much the dealership charged you for that?

JetDriver · 08-03-2022, 11:04 AM

Have they resolved this issue with a different coolant/additive requirement? It is strange to me that accelerated corrosion is happening in a car made these days. I suppose this is happening due to electrolysis.

Bimmerboybrian · 01-01-2023, 11:48 PM

Hello I have a f90 comp 2021 while driving today cruising in 5-6th gear going around 70-80mph and suddenly the car started to kick/jerk and the awd malfunction came on and put me in 2wd.
I slowed down and exited the freeway and the message went away but after awhile it started to jerk/kick at the same gears and speed but no malfunction code. Has anyone had this problem. Btw car is completely stock.

AHall · 01-02-2023, 08:03 AM

Quote:

Originally Posted by Bimmerboybrian

Hello I have a f90 comp 2021 while driving today cruising in 5-6th gear going around 70-80mph and suddenly the car started to kick/jerk and the awd malfunction came on and put me in 2wd.
I slowed down and exited the freeway and the message went away but after awhile it started to jerk/kick at the same gears and speed but no malfunction code. Has anyone had this problem. Btw car is completely stock.

I take it you were driving in manual mode given the speed and gear. Did the issue occur when shifted from 5th to 6th? What was your RPM when you shifted?

Bimmerboybrian · 01-02-2023, 09:03 AM

Quote:

Originally Posted by AHall

I take it you were driving in manual mode given the speed and gear. Did the issue occur when shifted from 5th to 6th? What was your RPM when you shifted?

I shifted at around 3.5k.

AHall · 01-02-2023, 10:56 AM

Let us know what the dealership says.

07-24-2020, 02:14 PM	#23
ambletx First Lieutenant 516 Rep 382 Posts Drives: 2021 M5 Comp Join Date: Oct 2017 Location: Austin, TX iTrader: (0)	Car is back and running great. Here's the service report on my issue.
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07-08-2021, 06:59 AM	#28
N-Dorfin New Member 6 Rep 19 Posts Drives: BMW M5 2018 Join Date: Feb 2021 Location: Czech republic iTrader: (0)	Mine M5 was going into limp mode after kickdowns as well (diagnostics said misfires on cylinders). Turned out, it was the same problem - corrosion on coils due to a leak of coolant... BMW under warranty replaced all coils and spark plugs. Now I did around 500 miles, tried several kickdowns and everything seems fine now ...
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08-02-2022, 11:22 PM	#29
Mrjetsetlife Enlisted Member 12 Rep 36 Posts Drives: BMW M5, McLaren GT Join Date: Aug 2022 Location: CHICAGO iTrader: (0)	Do you remembered how much the dealership charged you for that?
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08-03-2022, 11:04 AM	#30
JetDriver Private First Class 107 Rep 121 Posts Drives: No BMW yet :( Join Date: May 2011 Location: South Jersey iTrader: (0)	Have they resolved this issue with a different coolant/additive requirement? It is strange to me that accelerated corrosion is happening in a car made these days. I suppose this is happening due to electrolysis.
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01-01-2023, 11:48 PM	#31
Bimmerboybrian Registered 0 Rep 3 Posts Drives: Bmw m5 f90 lci comp Join Date: Jan 2023 Location: California iTrader: (0)	Hello I have a f90 comp 2021 while driving today cruising in 5-6th gear going around 70-80mph and suddenly the car started to kick/jerk and the awd malfunction came on and put me in 2wd. I slowed down and exited the freeway and the message went away but after awhile it started to jerk/kick at the same gears and speed but no malfunction code. Has anyone had this problem. Btw car is completely stock. Attached Images
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01-02-2023, 10:56 AM	#34
AHall Lieutenant Colonel 974 Rep 1,795 Posts Drives: 1993 Nissan 240sx Join Date: Oct 2008 Location: Frisco, Texas iTrader: (0)	Let us know what the dealership says.
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