[Jay43]

Im new to this forum so apologies if I make my self look like a fool. So I have a BMW M5 F90 2018. Whilst driving engine cut off at like 30mph. Does not start, it just does a click. Plugged in scanner and getting codes:

21a511
213007
213008
213009
030e08

I have checked these codes and they are linked to battery isolating switch/starter battery.

I previously changed coolant tank (leaking), coil packs 5 to 8 and all 8 spark plugs. Drove for 50 miles and then the engine cuts off.

Anyone else experienced anything like this? Battery was disconnected when work was carried out and then reconnected.

Any ides?

[pmsteinm]

If it's the isolation switch it could mean your battery got too discharged while you were working on it and didn't charge enough. Probably the first thing is to hook up a lithium ion charger. You need to do something special to close the isolation switch to allow it to charge. The bmw (ctek) one has instructions on how.

Forgot to add that the isolation switch is there so the battery doesn't discharge too much and damage the Lion battery.

[Jay43]

Originally Posted by pmsteinm

If it's the isolation switch it could mean your battery got too discharged while you were working on it and didn't charge enough. Probably the first thing is to hook up a lithium ion charger. You need to do something special to close the isolation switch to allow it to charge. The bmw (ctek) one has instructions on how.

Forgot to add that the isolation switch is there so the battery doesn't discharge too much and damage the Lion battery.

Thanks for the response. But can this happen even driving 50 miles after the work carried out? Im worried this may be a totally another issue like engine failure or maybe Im over thinking.

[pmsteinm]

It could be something else too. But that seems most likely. Unlike "normal" cars in typical German fashion of being too clever for their own good BMW only charges the battery when coasting. It's supposed to charge more when the engine won't be able to restart but depending on your drive cycle maybe it didn't.

[Jay43]

Originally Posted by pmsteinm

It could be something else too. But that seems most likely. Unlike "normal" cars in typical German fashion of being too clever for their own good BMW only charges the battery when coasting. It's supposed to charge more when the engine won't be able to restart but depending on your drive cycle maybe it didn't.

Hmmm, lets see, car is with a bmw m specliast. Lets see what bad news he has for me 😆

[pmsteinm]

It could be the alternator is bad. I had a car die on me once while riding along in stop and go traffic. I thought for sure the engine seized. But I got a jump and a bit of a charge and was able to make it home. Turns out it was a bad alternator. Hopefully it's just that or battery (although the battery in this car isn't cheap).

[Jay43]

Originally Posted by pmsteinm

It could be the alternator is bad. I had a car die on me once while riding along in stop and go traffic. I thought for sure the engine seized. But I got a jump and a bit of a charge and was able to make it home. Turns out it was a bad alternator. Hopefully it's just that or battery (although the battery in this car isn't cheap).

In this case it doesn't start at all, even if you jump start it. I know them battery are expensive but better then engine seized. I don't think it's alternator as it would of started with a jump start right? But the weird codes are all related to battery isolating switch/starter battery, the worrying thing is it could be showing these codes as the engine isn't turning so could be engine failure. Also the codes are not deleting

[pmsteinm]

Jump won't work if the isolation switch opened. It has to be closed first.

The manual says you need to charge before jumping in this case.

[Jay43]

Originally Posted by pmsteinm

Jump won't work if the isolation switch opened. It has to be closed first.

The manual says you need to charge before jumping in this case.

I wish this is the case, I didn't have that specific charger for the battery so got it towed to the garage. Im just waiting on that phone call 😆

[pbonsalb]

$30 Amazon lithium capable trickle charger may be worth buying. But why did the battery run down?

[carseatsm5]

I’m no mechanic but I would be shocked if this turns out to be a serious issue with the engine.

[Jay43]

Originally Posted by pbonsalb

$30 Amazon lithium capable trickle charger may be worth buying. But why did the battery run down?

Battery was removed when changing the coil packs and spark plugs. After 2 days (50miles) the engine cut off whilst driving. So i don't know if that was related. In the past month or so the prior to work being done, it has hardly been driven so i don't have a clue. But the codes reading it could be the battery isolating switch open/faulty/warning before opening. pmsteinm said charge it as they won't start even with a jump start which i had no idea about 😆

[Jay43]

Originally Posted by carseatsm5

I’m no mechanic but I would be shocked if this turns out to be a serious issue with the engine.

That's what I was thinking a week ago till I heard about rod bearing issues. 😑

[pbonsalb]

I have not read about rod bearing issues on these cars. I would change them at some point if I start reading a lot of reports of failures.

Changed rod bearings myself on my 2008 M3 and 2008 535xi, but the engines in those cars are known to have rod bearing issues, though whatever problem there is does not affect every car. I did them as preventative maintenance. The N54 bearings at 150k looked better than the S65 bearings at 60k.

[Jay43]

Spoke to garage, they go engine seized due to con rod failure. BMW M5 F90 2018 with 45k miles. He said he will strip down engine next week and get a proper look at it with pictures but for now he had a look at the oil pan and found metal pieces which he said is the con rod. 😂

[AHall]

Originally Posted by Jay43

Spoke to garage, they go engine seized due to con rod failure. BMW M5 F90 2018 with 45k miles. He said he will strip down engine next week and get a proper look at it with pictures but for now he had a look at the oil pan and found metal pieces which he said is the con rod. 😂

What is the history of this car? Did you buy it used and if so how long have you had it? What caused you to change the coolant tank, spark plugs, coils? I only assume there were some symptoms something was wrong. Just curious what led up to this and if it could have been avoided. I believe there has been at least one engine failure due to coolant tank leak.

[carseatsm5]

Originally Posted by Jay43

Spoke to garage, they go engine seized due to con rod failure. BMW M5 F90 2018 with 45k miles. He said he will strip down engine next week and get a proper look at it with pictures but for now he had a look at the oil pan and found metal pieces which he said is the con rod. 😂

Oh man no way. Sorry to hear that. Was the car tuned?

[jivom5]

Thats Extremely unlucky, id check for fault sparkplugs causing damage first

[Jay43]

Originally Posted by AHall

What is the history of this car? Did you buy it used and if so how long have you had it? What caused you to change the coolant tank, spark plugs, coils? I only assume there were some symptoms something was wrong. Just curious what led up to this and if it could have been avoided. I believe there has been at least one engine failure due to coolant tank leak.

Car has full BMW service history. I only had it for a month. The coolant has been leaking eve when I bought it, its a common fault. So bought a new tank and change spark plugs, coil packs. Car was fine up to the time the rod have broken. I spoke to garage, hes saying even though service was done 9k and was under a year. You should do oil service on these cars (m power) every 5k to main a healthy engine. Bmw says 18k or 2 years, he says that's nonsense as this what could lead to cars with issues.

I believe this is NOT a coolant tank leak which seized the engine but will know more next week.

[Jay43]

Originally Posted by carseatsm5

Oh man no way. Sorry to hear that. Was the car tuned?

Car is stock. Hasn't been touched. Its actually a really clean car but I guess comes down to luck and needing them oil changes sooner even if BMW says not too.

[Jay43]

Originally Posted by jivom5

Thats Extremely unlucky, id check for fault sparkplugs causing damage first

Could be. He said hes stripping it next week. Told him I want it fixed regardless, he said hopefully your cam shaft isn't damge, that alone is another £2.5k. But i will try and get pictures of the strip down

[jivom5]

Originally Posted by Jay43

Could be. He said hes stripping it next week. Told him I want it fixed regardless, he said hopefully your cam shaft isn't damge, that alone is another £2.5k. But i will try and get pictures of the strip down

best of luck