General Category > Central Vehicle Electronics/ZFE/GM issues
HELP - Mileage discrepancy!
WayneC:
--- Quote from: miguelmpn on January 20, 2026, 02:04:33 AM ---Sorry, I did not understand.
At the time I bought a second hand replacement.
One with the exact same model and I think same year.
My original one had more than 60000kms and the replacement had around 11000kms.
During the accident, the speedometer jumped out of the motorcycle and the tow truck did not bring it along.
--- End quote ---
Understood, failure to ensure the dash was recovered was a big mistake, I doubt you will be able to overcome the ODO mismatch error & a new dash from BMW will cost a lot of money
I have been repairing F800GS/R1200R dashes for a few years, they are CAN-Kombi-K7 & the F700 dash looks to be the same but I have not looked at an F700 dash or the ECU's for the F700, seeing an autoscan & the VO details for both the dash you fitted & the bike would be useful, take a look with GS911 & for a save/print of the info
botus:
across the entire motor industry its normally possible using dealer kit to wind cluster mileage forwards - but backwards is not possible - and going to max mileage and hoping to rollover to zero and then winding forwards is also locked out
the winding forward feature is to allow a new cluster to match the vehicle's actual mileage - (if the cluster has the correct VIN in there now, a helpful dealer might be able to help)
miguelmpn:
Yes, that's what I thought as well...
I had an accident and had to buy a replacement cluster.
I bought a used one, because the new ones include the ECU and more, and I would have to ship the motorcycle to Lisbon. (At the time, we did not have a dealer in Madeira Island) I installed and it works normally, just the distance blinks due to the error.
Now rwe have a Motorrad dealership with motorshop, so I went there to ask if they could solve it. They said they have no clue, and I would have to pay 80€ just to investigate.
So I left without asking them to do anything... and was trying to find another way, but the motorcycle is drivable, makes no difference other than knowing the error is there.
Just as a curiosity, I asked them how much for a service. They budgeted 600€. (thank god I've been doing them myself for over 20k kms, and even fixed the motorcycle after the accident)
botus:
€80 is very cheap for a diagnostics session at a main dealership for any manufacturer, on a merc in the UK std free is over €300
its more about the cost of the work booking it beforehand, then saying hello on the day and filling out paperwork (and charging for work done at pick up), then the tech taking 10 mins to find and get in the workshop, and then plugging it in to talk to base to see what muddle up the bike is in - altogether that'll be 30 mins chargeable labour easily - and the rental on the dealer online diagnostic equipment on a Merc is €12000 a year ongoing - I expect a BMW dealer won’t be charged much less to lease the equipment
I can see a number of pitfalls
1) the VIN listed in the cluster unit now on your bike isn't likely to be your bikes original VIN so BMW systems will bulk at any further work - unless someone has helped you sort this - its all doable just not easy and most don't have the kit. No idea how on the TFT cluster from 2017 to 2024, but I bet its doable. (note: this is not case on newer 2025 model year bikes, they have a new setup stopping play)
2) it maybe that HEX have done some work that maybe give insights on both the VIN change and the Mileage issue - worth asking the question
3) maybe you are unaware - the TFT clusters have been full of quite buggy software and a number of minor issues, and with user weirdness and features not behaving - there is about 10 cluster software updates that say a 2018 bike hasn't got vs an up to date 2024 unit has
so if the VIN inside the unit is OK it likely needs an update and you could come out in a good place....
WayneC:
--- Quote from: botus on May 09, 2026, 10:03:48 AM ---€80 is very cheap for a diagnostics session at a main dealership for any manufacturer, on a merc in the UK std free is over €300
its more about the cost of the work booking it beforehand, then saying hello on the day and filling out paperwork (and charging for work done at pick up), then the tech taking 10 mins to find and get in the workshop, and then plugging it in to talk to base to see what muddle up the bike is in - altogether that'll be 30 mins chargeable labour easily - and the rental on the dealer online diagnostic equipment on a Merc is €12000 a year ongoing - I expect a BMW dealer won’t be charged much less to lease the equipment
I can see a number of pitfalls
1) the VIN listed in the cluster unit now on your bike isn't likely to be your bikes original VIN so BMW systems will bulk at any further work - unless someone has helped you sort this - its all doable just not easy and most don't have the kit. No idea how on the TFT cluster from 2017 to 2024, but I bet its doable. (note: this is not case on newer 2025 model year bikes, they have a new setup stopping play)
2) it maybe that HEX have done some work that maybe give insights on both the VIN change and the Mileage issue - worth asking the question
3) maybe you are unaware - the TFT clusters have been full of quite buggy software and a number of minor issues, and with user weirdness and features not behaving - there is about 10 cluster software updates that say a 2018 bike hasn't got vs an up to date 2024 unit has
so if the VIN inside the unit is OK it likely needs an update and you could come out in a good place....
--- End quote ---
Way too much irrelevant info & misinformation better to comment on individual issues when the subject is known & answers are relevant clearly not in this case
With the K7 CAN dashes VIN, VO & ODO values are all stored in Dash & BMSKP with the dash acting as backup, the EEPROM in the dashes has been determined by others to be read only for VIN & ODO at a minimum & it is labelled as Mfr of BMW so is custom for them to prevent 3rd party EEPROM Reader/Writers being used to change content, I can think of one owner who went to the extent of desolder of the EEPROM & resolder on an other pcb
There has been no volume of requests to look further into reprogramming of the K7 dashes, repairs however due ageing there are many requests, completed 3 this week alone & another arriving next week
The "the TFT clusters have been full of quite buggy software" TFT display is merely a display firmware is specific to the model/year of the bike & for the K7 dash consists of one updatable firmware file for all the dash functions so to lump all year model issues together is rubbish, the dash firmware including the LCD display on the K7 is good & stable
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