Re-Mapping
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Original Poster:

5,697 posts

254 months

Tuesday 21st June 2011
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Hi Guys
Currently own an 2010 320d M Sport with the 184bhp engine.
Looking at getting a remap but have been told that when you put the key fob in the ignition it will down load all current settings and tell the dealer when it goes in for a service that the vehicle has been remapped or tampered with, obviously making the warranty void, is this the case??

Tea Pot One

1,870 posts

259 months

Tuesday 21st June 2011
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Who told you this ?

Crimp a Length!

Original Poster:

5,697 posts

254 months

Wednesday 22nd June 2011
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Tea Pot One said:
Who told you this ?
The company who are re-mapping some of the cars at the place i work.
If this is the case as it will be a show stopper if so

TheEnd

15,370 posts

219 months

Wednesday 22nd June 2011
quotequote all
It only has minor details like current mileage, service status and some identified, like the VIN number.

When they place it on the key reader, it will just pull up the known history databases.

Crimp a Length!

Original Poster:

5,697 posts

254 months

Wednesday 22nd June 2011
quotequote all
TheEnd said:
It only has minor details like current mileage, service status and some identified, like the VIN number.

When they place it on the key reader, it will just pull up the known history databases.
Are you sure mate because he claims that 2010 models and newer this has changed??

TheEnd

15,370 posts

219 months

Wednesday 22nd June 2011
quotequote all
There is only going to be a very small amount memory space on the key chips.

I can't be certain they haven't changed something, but the last time I have seen something like this, it was already a note on the service history that was flagged up.

There certainly are plenty of people who have had tuned newer cars pass through dealers un-noticed.

Crimp a Length!

Original Poster:

5,697 posts

254 months

Wednesday 22nd June 2011
quotequote all
TheEnd said:
There is only going to be a very small amount memory space on the key chips.

I can't be certain they haven't changed something, but the last time I have seen something like this, it was already a note on the service history that was flagged up.

There certainly are plenty of people who have had tuned newer cars pass through dealers un-noticed.
Thanks mate, i will check it out with somebody i know at the dealers before pressing the button to get it done.

TheEnd

15,370 posts

219 months

Wednesday 22nd June 2011
quotequote all
As far as I am aware, the only possible way of doing this would be that a) the chip would also store fault codes, and b) the ECU would recognise that it has been changed and store it as a fault hidden away from fault code readers.

I don't think either of those things happen, and also the BMW technicians don't have any idea of what is in the ECU.

If there is any doubt, it will be reprogrammed to the original or an update if there is one, and taken from there, as it is far quicker than going CSI on the car and having to train people to look for something that might not be there.

don'tbesilly

15,362 posts

194 months

Wednesday 22nd June 2011
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It won't be the key fob that gives the game away!

BMW have introduced a new system which logs a *fault code* on the car when the ECU has been altered/manipulated outside of the factory specifications.

When your car goes into a BMW dealer the car will be hooked up to the diagnostics equipment and your cars files will be uploaded to a database at BMW AG.
If the *fault code* is found, your car will be flagged on the system as having been modified, and that flag will stay on the system indefinitely.


Crimp a Length!

Original Poster:

5,697 posts

254 months

Wednesday 22nd June 2011
quotequote all
don'tbesilly said:
It won't be the key fob that gives the game away!

BMW have introduced a new system which logs a *fault code* on the car when the ECU has been altered/manipulated outside of the factory specifications.

When your car goes into a BMW dealer the car will be hooked up to the diagnostics equipment and your cars files will be uploaded to a database at BMW AG.
If the *fault code* is found, your car will be flagged on the system as having been modified, and that flag will stay on the system indefinitely.
Cheers was this introduced on 2011 model yrs or before?
This could be what the guy meant who was going to do the remap??

don'tbesilly

15,362 posts

194 months

Thursday 23rd June 2011
quotequote all
Crimp a Length! said:
Cheers was this introduced on 2011 model yrs or before?
This could be what the guy meant who was going to do the remap??
I think it came in on 2010 models, but I'm not 100% sure.

turboman786

1,131 posts

218 months

Thursday 23rd June 2011
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So, is there a definitive answer on whether dealers can detect remaps?

I am wanting to remap my 535d but want to keep the warranty in tact, and have therfore refrained from the remap so far.....

PJ S

10,842 posts

258 months

Thursday 23rd June 2011
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Dealers don't detect it per se - BMW's software, which connects to the factory, may do as it gets updated.
So what may not be detected today, could be another day by the new revision being used.
Had a bit of a chat about this with a Service chap this morning, from Chandlers, whilst trying to get info on a car listed in their area.
You could just speak to service at another dealership elsewhere in the country to see if they confirm what I've relayed above.

Mo D

274 posts

186 months

Thursday 23rd June 2011
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I'm also very interested as I'm quite worried about invalidating the AUC warranty (and after that the extended warranty) if I remap my car. Its 06, so am I right in thinking that I can get around this? I had my previous mapped car serviced at BMW, had no indication that they knew about it.

I asked this question to another BMW forum, I was reassured that it depends on some dealers, but some had absolutely no problems with BMW extended warranty when claiming. Indeed, one of the senior tech guys knew that car in question was remapped (after a test drive) but didn't mention anything.

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Original Poster:

5,697 posts

254 months

Thursday 23rd June 2011
quotequote all
Might be better with one of those "tunit" boxes, i had one on my A4 few yrs ago, it was superb, 190bhp from a 140bhp derv engine had it on the rollers to verify it.....

Remaps are just bettter suited and the power is across the range, just don't want to risk the warranty aspect.

Mo D

274 posts

186 months

Thursday 23rd June 2011
quotequote all
Crimp a Length! said:
Might be better with one of those "tunit" boxes, i had one on my A4 few yrs ago, it was superb, 190bhp from a 140bhp derv engine had it on the rollers to verify it.....

Remaps are just bettter suited and the power is across the range, just don't want to risk the warranty aspect.
Having done a bit of research on this topic, I have seen that some well known mappers use the existing ECU map and tweak it, making it very hard for the dealer to spot, if at all. Apparently the good tuners can do this, some of the cheaper ones (who bolt a stock map after 20 minutes lol) don't. As a result the cheaper maps are alot easier to spot, as they have different fault codes. BTW, this is from a BMW technician, posting in a BMW forum.

Some remap companies claim never to have had an issue with dealer finding out the remap during a service.

I have to admit I found that a little reassuring, so I may indeed get my car remapped after all. The chances of something going wrong are very remote anyway.

I'd say go for it, you won't regret it. I loved the performance from my old 320d. That's why I'm so keen to get mine done. However, make sure you inform your insurance company though, some won't cover mods.

TheEnd

15,370 posts

219 months

Thursday 23rd June 2011
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One of the big things is that BMW want a slice of the pie.
Rather than fight it, they have decided to join in and offer their own remaps so they will be going all-out to dissuade you from going aftermarket.

Crimp a Length!

Original Poster:

5,697 posts

254 months

Saturday 25th June 2011
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Just found out from the dealer that 2009 models can be traced if re-mapped

Tea Pot One

1,870 posts

259 months

Saturday 25th June 2011
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Re tuning boxes ... don't they leave error codes - due to increasing this, that and the other to make more power - just like when a remap is applied ?

TheEnd

15,370 posts

219 months

Saturday 25th June 2011
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Tuning boxes can leave errors if they are turned up too much for implausible rail pressures, but not always.