[Miller uk]

Just heard back from dealership and the Puma case.
Seems there have been two other cases reported in the U.K. and in both the fault was traced to a crankshaft sensor. Have no idea what that does but on the other two cases replacing the sensor resolved the issue. Just waiting on parts delivery date and then will get the repair. Hopefully this will finally resolve the issue

[ernie uk]

I'm not a F90 M5 owner yet but I hope to be in the near future. May I suggest that you get your dealer to check the starter motor out? The symptoms you describe point to that it may not be engaging properly causing whining noise you are hearing.

[onlyoujames]

Originally Posted by ernie uk

I'm not a F90 M5 owner yet but I hope to be in the near future. May I suggest that you get your dealer to check the starter motor out? The symptoms you describe point to that it may not be engaging properly causing whining noise you are hearing.

Really appreciate your advise. I'll let my dealer's technician check next I visit them.

[lemetier]

Originally Posted by Miller uk

Just heard back from dealership and the Puma case.
Seems there have been two other cases reported in the U.K. and in both the fault was traced to a crankshaft sensor. Have no idea what that does but on the other two cases replacing the sensor resolved the issue. Just waiting on parts delivery date and then will get the repair. Hopefully this will finally resolve the issue

That would do it. The crankshaft position sensor out of sync would cause a misfire on the initial startup rotation causing a delay start. The HIS unit will have released its pressure reserve however, engaging the transmission output causing it to try, momentarily, to start with the car in gear, which doesn't work.

[k332814]

Sounds like a RHD issue.

[Realnyc8]

yes i had to do the crankshaft sensor replacement. was an issue with G30 5 series too. i had the same problem, and had a few drivetrain malfunction messages as well. my dealer replaced the part and i didnt have the issue afterwards

[CanuckinVancouver]

Thanks to realnyc8 for alerting me to this thread. I had just posted a new thread on this tonight:

https://f90.bimmerpost.com/forums/sh....php?t=1571066

This is exactly what happened to me 3 times today over the span of an hour while driving. I have sent the URL of this thread to my service technician; I have an urgent service appointment booked in next week. Sounds like its still OK to keep driving the Beast until then...

[onlyoujames]

Originally Posted by CanuckinVancouver

Thanks to realnyc8 for alerting me to this thread. I had just posted a new thread on this tonight:

https://f90.bimmerpost.com/forums/sh....php?t=1571066

This is exactly what happened to me 3 times today over the span of an hour while driving. I have sent the URL of this thread to my service technician; I have an urgent service appointment booked in next week. Sounds like its still OK to keep driving the Beast until then...

My one was ok for almost 2 months but happened again today in the morning and it is the only day I did put my GoPro on to record it.!

[onlyoujames]

Originally Posted by Miller uk

Just heard back from dealership and the Puma case.
Seems there have been two other cases reported in the U.K. and in both the fault was traced to a crankshaft sensor. Have no idea what that does but on the other two cases replacing the sensor resolved the issue. Just waiting on parts delivery date and then will get the repair. Hopefully this will finally resolve the issue

Hi mate, how did you go with your one? It's been fixed?

[Miller uk]

The car goes in on Monday. Slight delay in getting the part (wait till Brexit, never get a spare part again). Hope this is finally it. Won't be confident until it's run for a couple of weeks, due to the random nature of the fault. Real shame that a tiny sensor can ruin the experience for 4 months but other than that the car is fantastic, but really too uncomfortable for the UK's poorly maintained roads. (However I never admit that to the wife, just pretend I don't know what she is talking about). To be fair to BMW this is my 4th M5 and the first to really cause me ongoing problems. Only really had a coil pack failure in an F10 which was fixed immediately. I hope this is it now.

[onlyoujames]

Originally Posted by Miller uk

The car goes in on Monday. Slight delay in getting the part (wait till Brexit, never get a spare part again). Hope this is finally it. Won't be confident until it's run for a couple of weeks, due to the random nature of the fault. Real shame that a tiny sensor can ruin the experience for 4 months but other than that the car is fantastic, but really too uncomfortable for the UK's poorly maintained roads. (However I never admit that to the wife, just pretend I don't know what she is talking about). To be fair to BMW this is my 4th M5 and the first to really cause me ongoing problems. Only really had a coil pack failure in an F10 which was fixed immediately. I hope this is it now.

Hi mate, did your technician actually diagnose the sensor and found it's was faulty? I am sending my car to my dealer to check on it next week. Hopefully we put an end to all this misery!
This actually is my first m5 and not to mention one of the TPMS sensor's ordered and place in the second week I got the car. My old m4 only rattled and squeaked when driving but not like m5 all mechanical and electrical problems. A bit of surprised for this sort of price range car!

[Miller uk]

No there has been no diagnosis. The dealership is simply following the instructions of BMW technical support. These are the same people who ordered the software update as a fix to the issue. They seem more confident as there have been another couple of instances exactly the same as mine and they were resolved by changing the crankshaft sensor.
I agree for the money it's poor and BMW UK, not the Dealership have been hopeless.
In someways I blame myself as I broke a rule I promised myself always to let the model run for a year before buying, to try and flush out the faults.
Speaking with technician on Monday so will update if he has any further information

[onlyoujames]

Originally Posted by Miller uk

No there has been no diagnosis. The dealership is simply following the instructions of BMW technical support. These are the same people who ordered the software update as a fix to the issue. They seem more confident as there have been another couple of instances exactly the same as mine and they were resolved by changing the crankshaft sensor.
I agree for the money it's poor and BMW UK, not the Dealership have been hopeless.
In someways I blame myself as I broke a rule I promised myself always to let the model run for a year before buying, to try and flush out the faults.
Speaking with technician on Monday so will update if he has any further information

Ok I got it and thanks for keeping me posted.

[Miller uk]

Car is in today for a replacement Crank shaft sensor. Spoke with technician who had been dealing with this since September and he said this is the fix being advised by BMW technical. To him it makes sense, they have updated software, next is the sensor that gives the car its reference point re engine position and how to start the car. It is a process of elimination but good news is that another couple of cars have had the same issue and replacing this sensor did resolve it. See how we get on when I get it back.

[JSR2018]

This happened to me at the weekend whilst stuck in traffic leaving a football match in West Bromwich, was quite confusing initially but then I remembered this thread.....

I'll be calling my dealer shortly.

[onlyoujames]

Originally Posted by Miller uk

Car is in today for a replacement Crank shaft sensor. Spoke with technician who had been dealing with this since September and he said this is the fix being advised by BMW technical. To him it makes sense, they have updated software, next is the sensor that gives the car its reference point re engine position and how to start the car. It is a process of elimination but good news is that another couple of cars have had the same issue and replacing this sensor did resolve it. See how we get on when I get it back.

Great news! Will call my dealer in the morning straightaway. Does replacing the sensor involve a lot of hard works? Thanks.

[Miller uk]

I did ask and the technician didn't think it was much more than an hours work. Involves removing some of the plates under the car to gain access to the bottom of the engine and then the part swaps out. All should be good as long as the correct part has been ordered. Technician also noted squeaky brakes so wants to try and deglaze then whilst it's in. So will get car back tomorrow

[onlyoujames]

Originally Posted by Miller uk

I did ask and the technician didn't think it was much more than an hours work. Involves removing some of the plates under the car to gain access to the bottom of the engine and then the part swaps out. All should be good as long as the correct part has been ordered. Technician also noted squeaky brakes so wants to try and deglaze then whilst it's in. So will get car back tomorrow

Hi mate, I guess no news is good news?
My m5 is finally booked in for a crankshaft sensor checking this Thursday.

[Miller uk]

Yes all good so far. No repeat of the issue since the sensor was replaced. Hopefully that's it now. Just a shame it took so long to find the cause of the issue. Good luck hope they replace your as it look like it's the fix

[josec70]

Originally Posted by Miller uk

Yes all good so far. No repeat of the issue since the sensor was replaced. Hopefully that's it now. Just a shame it took so long to find the cause of the issue. Good luck hope they replace your as it look like it's the fix

Congrats brother! Great to see there's a solution going forward.

[onlyoujames]

Originally Posted by Miller uk

Yes all good so far. No repeat of the issue since the sensor was replaced. Hopefully that's it now. Just a shame it took so long to find the cause of the issue. Good luck hope they replace your as it look like it's the fix

Congratulations mate! It's been so long and good to know it's finally been fixed. I hope I will get my one replaced asap.

[Miller uk]

Let me know what your dealer says when you take it in. I hope it's resolved soon