[rpinson]

Several months ago I replaced the cluster in my 2007 335i with the intention of getting it programmed and coded shortly thereafter. Initially the cluster read the correct mileage of the car (~56k miles) with the tamper dot. I had to deal with some more pressing family issues and just didn't even think about the cluster for a few months since it seemed everything was ok except for the dot showing and a couple of the systems not working exactly correctly.

A couple of weeks ago, I started the car and the mileage read ~115k (what I assume to be the used cluster mileage). I took it out and dropped it off with a local guy to clear the EEPROM, but when it was put back in the car and the VIN was written to it, it still showed the 115k miles (but the tamper dot was now gone).

I've searched and read and I still haven't found anything definitive that is helpful to me. I do see mentions of the CAS(?) and using certain tools to overwrite the mileage there, but it all seems pretty shady and not very informative at all.

Did I really just add ~60k to the car that can't be reversed because I waited too long? I'm also now getting the "brake service due now" message that says I'm 39k miles overdue, presumably because the car jumped 60k miles overnight.

Any insight would be greatly appreciated. Thanks guys.

[Schmidty335i]

Originally Posted by rpinson

Several months ago I replaced the cluster in my 2007 335i with the intention of getting it programmed and coded shortly thereafter. Initially the cluster read the correct mileage of the car (~56k miles) with the tamper dot. I had to deal with some more pressing family issues and just didn't even think about the cluster for a few months since it seemed everything was ok except for the dot showing and a couple of the systems not working exactly correctly.

A couple of weeks ago, I started the car and the mileage read ~115k (what I assume to be the used cluster mileage). I took it out and dropped it off with a local guy to clear the EEPROM, but when it was put back in the car and the VIN was written to it, it still showed the 115k miles (but the tamper dot was now gone).

I've searched and read and I still haven't found anything definitive that is helpful to me. I do see mentions of the CAS(?) and using certain tools to overwrite the mileage there, but it all seems pretty shady and not very informative at all.

Did I really just add ~60k to the car that can't be reversed because I waited too long? I'm also now getting the "brake service due now" message that says I'm 39k miles overdue, presumably because the car jumped 60k miles overnight.

Any insight would be greatly appreciated. Thanks guys.

The car stores your mileage in two locations one in the cluster and one in another component of the car (i forget where but its not part of the cluster) i have read on some other forums that this is to prevent lost information in case one of the systems goes out it is backed up. i also read that if you put in a used cluster that the car will automatically refer to the higher mileage and rewrite the other to that. thats why they warn not to install a cluster with higher miles than the car without first replacing the eeprom chip. i think your only way of getting back to the original miles would be your "shady" way. i hope i am wrong and you can code the car right with the actual miles. good luck and keep us informed on what happens.

[Levanime]

when working the EEPROM it needs to be erased the milage and VIN number,
after this, when coding, VIN code and mileage is copied from CAS

[Jozy]

so... the cas now stores 115k miles copied from the kombi?

[rpinson]

Originally Posted by Jozy

so... the cas now stores 115k miles copied from the kombi?

that's the way it appears, yes.

[Sensible_]

1st - I never seen a cluster switch between odo readings when tamper dot is present. That is strange.

2nd - You have a whole world of pain now.

I wont discuss this any further on a forum. Changing clusters is one thing but openly discussing how to lower a cars odometer must be borderline illegal in most places.

[RuinE90d]

Originally Posted by Sensible_

1st - I never seen a cluster switch between odo readings when tamper dot is present. That is strange.

2nd - You have a whole world of pain now.

I wont discuss this any further on a forum. Changing clusters is one thing but openly discussing how to lower a cars odometer must be borderline illegal in most places.

What a joke... "borderline illegal" to restore actual vehicle mileage?

I'm having the same exact problem after swapping to a used 335 cluster to get the oil temp gauge. I welcome these borderline illegal conversations if anyone has had any luck correcting this issue.

[808AWD325xi]

Originally Posted by RuinE90d

What a joke... "borderline illegal" to restore actual vehicle mileage?

I'm having the same exact problem after swapping to a used 335 cluster to get the oil temp gauge. I welcome these borderline illegal conversations if anyone has had any luck correcting this issue.

There is nothing borderline about it, mileage tampering (whatever the excuse) is a felony offense in the United States.

It's far from a trivial problem. The DME, CAS, and KOMBI actively exchange mileage information. KOMBI even compares its mileage reading in RAM with the value stored in its EEPROM. CAS propagates the mileage reading to your key fob(s). Other modules store the mileage reading as well.

You're probably not going to find the information or assistance that you seek here.

[RuinE90d]

Originally Posted by BimmerGeeks

+1, even if someone was willing to help you, it would take heaps of legit documentation that your mileage truly is incorrect.

I think some of you are being a bit extreme about the topic of conversation. Clearly the issue isn't someone trying to tamper with mileage. There is a defect with the vehicle as it is showing false mileage after a used part was installed. People having this problem should be able to discuss this and share any success they've had in restoring the correct mileage. I'm not suggesting we discuss rolling the odometer by hacking the DME. I'm suggesting we share any knowledge about proving the correct vehicle mileage is within the DME and how to reverse or revert to the original mileage if it's possible. All of this is assuming someone was able to correct the problem in a legal manner. Again, no one is trying to tamper with an odometer, we are trying to reverse the car tampering with itself.

[Sensible_]

Originally Posted by RuinE90d

I think some of you are being a bit extreme about the topic of conversation. Clearly the issue isn't someone trying to tamper with mileage. There is a defect with the vehicle as it is showing false mileage after a used part was installed. People having this problem should be able to discuss this and share any success they've had in restoring the correct mileage. I'm not suggesting we discuss rolling the odometer by hacking the DME. I'm suggesting we share any knowledge about proving the correct vehicle mileage is within the DME and how to reverse or revert to the original mileage if it's possible. All of this is assuming someone was able to correct the problem in a legal manner. Again, no one is trying to tamper with an odometer, we are trying to reverse the car tampering with itself.

To be honest I think you are missing our point.

I can easily reverse the mileage, however I won't share this, nor will I help anyone do it given the information provided by the OP. What do you expect on a public forum?

The fact is, I simply don't believe information provided. I have never seen an odometer randomly change without human intervention.

If the OP can provide more information on the history of the vehicle then I would / point him in the right direction. It's not rocket science.

[RuinE90d]

It's pretty easy to prove you wrong, Senseless... Just install a used cluster and follow up when the mileage changes on you. I don't think a criminal would go to such lengths as open discussion to roll mileage. Thanks for assuming we are both liars.

[Sensible_]

Originally Posted by RuinE90d

It's pretty easy to prove you wrong, Senseless... Just install a used cluster and follow up when the mileage changes on you. I don't think a criminal would go to such lengths as open discussion to roll mileage. Thanks for assuming we are both liars.

Thanks. But I've installed many used clusters with no problems.

I'm not saying you are criminals. But in my experience I've not personally seen the symptoms described.

[808AWD325xi]

I'm developing my own INPA script for MSD80/MSD81 DMEs and one of the diagnostic features is a mileage sanity check:


I found a second mileage reading in the DME, but haven't yet confirmed what it represents. It could be indicative of an event that occurred or perhaps it's a calculated mileage for maintenance purposes.

Originally Posted by RuinE90d

It's pretty easy to prove you wrong, Senseless... Just install a used cluster and follow up when the mileage changes on you. I don't think a criminal would go to such lengths as open discussion to roll mileage. Thanks for assuming we are both liars.

Name-calling isn't necessary and may negatively impact your ability to garner assistance in the future.

Originally Posted by Sensible_

Thanks. But I've installed many used clusters with no problems.

I'm not saying you are criminals. But in my experience I've not personally seen the symptoms described.

I've read posts concerning other chassis' that suggest it's possible. Meaning that if a cluster with lower mileage is installed, it will eventually assume the higher mileage reading from CAS. Likewise, if a cluster with higher mileage is installed, CAS will eventually assume the higher mileage.

[Sensible_]

Originally Posted by 808AWD325xi

I'm developing my own INPA script for MSD80/MSD81 DMEs and one of the diagnostic features is a mileage sanity check:


I found a second mileage reading in the DME, but haven't yet confirmed what it represents. It could be indicative of an event that occurred or perhaps it's a calculated mileage for maintenance purposes.

Name-calling isn't necessary and may negatively impact your ability to garner assistance in the future.

I've read posts concerning other chassis' that suggest it's possible. Meaning that if a cluster with lower mileage is installed, it will eventually assume the higher mileage reading from CAS. Likewise, if a cluster with higher mileage is installed, CAS will eventually assume the higher mileage.

Interesting. Looking forward to the INPA script.

Can you link me to these episodes where a cluster with mismatched VIN has taken the odometer reading from the car? Genuinely interested. Tried searching but not come back with anything.

[808AWD325xi]

Originally Posted by Sensible_

Interesting. Looking forward to the INPA script.

Can you link me to these episodes where a cluster with mismatched VIN has taken the odometer reading from the car? Genuinely interested. Tried searching but not come back with anything.

PM sent.

[Terraphantm]

Originally Posted by RuinE90d

I'm not suggesting we discuss rolling the odometer by hacking the DME. I'm suggesting we share any knowledge about proving the correct vehicle mileage is within the DME and how to reverse or revert to the original mileage if it's possible.

The reality is that both suggestions amount to the same thing. I'm not opposed to sharing the knowledge, but I don't know every piece of the puzzle.

Cluster and CAS are easy enough. Keys I'm not sure, but worst case you could probably just get a new key. DME is doable - if it's an MSV80/MSD80/MSD81, you'd probably have to desolder the 95640 chip and look for the mileage. MSV70 can be done via BDM. And I don't know if there are other modules involved.

[Levanime]

I've also heard/read about this kind of cases
neither i touch them

[RuinE90d]

Originally Posted by Terraphantm

The reality is that both suggestions amount to the same thing. I'm not opposed to sharing the knowledge, but I don't know every piece of the puzzle.

Cluster and CAS are easy enough. Keys I'm not sure, but worst case you could probably just get a new key. DME is doable - if it's an MSV80/MSD80/MSD81, you'd probably have to desolder the 95640 chip and look for the mileage. MSV70 can be done via BDM. And I don't know if there are other modules involved.

I definitely don't know what is required to restore the original mileage... maybe that's why I'm defensive about being called a liar.

In my mind (the perfect world) the DME would have a log of vehicle mileage and a 40k jump would be visible in the computer history. Furthermore, I thought there may be a solution that didn't require coding the computer. I hoped there was a method such as replacing my used cluster with one that was new or refurbished with zero miles. I thought maybe if you removed the source of bad data (incorrect mileage) I.e. The used cluster, that the car may display the true mileage once again. That's the sort of solution I was inquiring about.

Also, in the event it wasn't clear, my used cluster was not flashed and re-chipped before install... I just plugged it in thinking "great now I have an oil temp gauge" and didn't notice the tamper dot.

[Levanime]

no, that would not help,
modules are synchronizing to the highest available mileage