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Discussion Starter #1
Hi guys,
I bought a 2003 cooper and all of a sudden it’s having some weird electrical issue.
The indicators didn’t work this morning (no clicking inside car either) nor did the hazards. Then sometimes the hazards work when I off and on the car, then I turn car off and on and the indicators work as normal. Then went for a drive got back and they don’t work again. Also after opening the bonnet the bonnet open light stays on now?? The sunroof doesn’t open either but it’s never worked since I bought the car 4 days ago
I read something about body control unit? Does this sound right?
Cheers?
 

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Discussion Starter #3
yes sounds about right for bcm or water ingress somewhere maybe
thanks, how hard is it to change? I see used ones for£20 on ebay.
where else could I check for water ingress? It’s a sunroof model but the sunroof doesn’t open
It has been raining here recently and I washed the car so could be water ingress
 

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trouble is they are not plug and play hey are programmed to that car including the vin and alarm and keys so you have 3 options,
1 find from breakers all ecu's and keys and replace them all from breaker car,
2 brand new one from bmw mini £800 ish
3 clone a used unit from ebay not many people can do this needs some specialist gear,, i have contact number for a guy who does this he's called dale and he can now clone them after i nagging him to work it out etc, just say mike sent you he's good guy can do anything from mileages and ecu's map files by post ie send ecu to him can be mapped or delete software for egr and dpf etc decat most things, i do it from time to time when i get something i cant cope with he's fair guy,,, dale bracewell PHONE NUMBER 07807 222262 not much he cant work out,
in fact there is a 4th way ie send off to repairer they repair your old unit trouble with this the costs are not fixed and open to abuse i feel ie reason these units fail is they have tiny relays soldered on to the circuit board they are rubbish and expensive so most repair places will always say replace them all after they receive the unit then your tied in to having the job done,, ie they know you cant clone it with out the factory bcm present to copy the files,,
location is foot well where all the in car fuses live that is bcm, also before blaming bcm need to ensure the stalks are all ok as these can effect things
need to work your self around with a multi meter check earths and feeds to all the items not working, trace back to bcm if have power to bcm and no power after bcm to light but have power at switches chance are its a bcm issue if all fuse.s are checked as well, i've been doing this most of my life and i got to tell you its not easy and as i get older my memory plays silly buggers with me forget wiring traces and sometimes need to step away from it for a hour and start again easy to miss something
 

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Discussion Starter #5
trouble is they are not plug and play hey are programmed to that car including the vin and alarm and keys so you have 3 options,
1 find from breakers all ecu's and keys and replace them all from breaker car,
2 brand new one from bmw mini £800 ish
3 clone a used unit from ebay not many people can do this needs some specialist gear,, i have contact number for a guy who does this he's called dale and he can now clone them after i nagging him to work it out etc, just say mike sent you he's good guy can do anything from mileages and ecu's map files by post ie send ecu to him can be mapped or delete software for egr and dpf etc decat most things, i do it from time to time when i get something i cant cope with he's fair guy,,, dale bracewell PHONE NUMBER 07807 222262 not much he cant work out,
in fact there is a 4th way ie send off to repairer they repair your old unit trouble with this the costs are not fixed and open to abuse i feel ie reason these units fail is they have tiny relays soldered on to the circuit board they are rubbish and expensive so most repair places will always say replace them all after they receive the unit then your tied in to having the job done,, ie they know you cant clone it with out the factory bcm present to copy the files,,
location is foot well where all the in car fuses live that is bcm, also before blaming bcm need to ensure the stalks are all ok as these can effect things
need to work your self around with a multi meter check earths and feeds to all the items not working, trace back to bcm if have power to bcm and no power after bcm to light but have power at switches chance are its a bcm issue if all fuse.s are checked as well, i've been doing this most of my life and i got to tell you its not easy and as i get older my memory plays silly buggers with me forget wiring traces and sometimes need to step away from it for a hour and start again easy to miss something
Thanks

do you know how much he charges to code the bcm? Also will any used one work after coding or is it specific units for different spec’s cars? Cheers
 

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It clearly seams like bcm issue, u can replace with used (done it myself as im in buget), u need to match all numbers best to have the same model and within week or 2 of production, make sure it had sunroof, mine didnt so it wasn't an issue. Everything will work as should , accept remote locking u will need to open from the hole.
 

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It clearly seams like bcm issue, u can replace with used (done it myself as im in buget), u need to match all numbers best to have the same model and within week or 2 of production, make sure it had sunroof, mine didnt so it wasn't an issue. Everything will work as should , accept remote locking u will need to open from the hole.
,Dealer will most likely make i buy a new one, there are online services for £90 for reprogramming of ur bcm with old with used one. I am driving with unprogramed bcm now for about 3 month.
 

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Here is link to my bcm issue!
Also if u have sunroof there is good chance of moisture getting into bcm, try removing it check for water damage and if wet dry it key cure it!
 

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Discussion Starter #9
trouble is they are not plug and play hey are programmed to that car including the vin and alarm and keys so you have 3 options,
1 find from breakers all ecu's and keys and replace them all from breaker car,
2 brand new one from bmw mini £800 ish
3 clone a used unit from ebay not many people can do this needs some specialist gear,, i have contact number for a guy who does this he's called dale and he can now clone them after i nagging him to work it out etc, just say mike sent you he's good guy can do anything from mileages and ecu's map files by post ie send ecu to him can be mapped or delete software for egr and dpf etc decat most things, i do it from time to time when i get something i cant cope with he's fair guy,,, dale bracewell PHONE NUMBER 07807 222262 not much he cant work out,
in fact there is a 4th way ie send off to repairer they repair your old unit trouble with this the costs are not fixed and open to abuse i feel ie reason these units fail is they have tiny relays soldered on to the circuit board they are rubbish and expensive so most repair places will always say replace them all after they receive the unit then your tied in to having the job done,, ie they know you cant clone it with out the factory bcm present to copy the files,,
location is foot well where all the in car fuses live that is bcm, also before blaming bcm need to ensure the stalks are all ok as these can effect things
need to work your self around with a multi meter check earths and feeds to all the items not working, trace back to bcm if have power to bcm and no power after bcm to light but have power at switches chance are its a bcm issue if all fuse.s are checked as well, i've been doing this most of my life and i got to tell you its not easy and as i get older my memory plays silly buggers with me forget wiring traces and sometimes need to step away from it for a hour and start again easy to miss something
Here is link to my bcm issue!
Also if u have sunroof there is good chance of moisture getting into bcm, try removing it check for water damage and if wet dry it key cure it!
Thankyou all!
I was wondering if I got a used part will it need to be from the same transmission type? My car is automatic but the used parts are from manual?
 

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It clearly seams like bcm issue, u can replace with used (done it myself as im in buget), u need to match all numbers best to have the same model and within week or 2 of production, make sure it had sunroof, mine didnt so it wasn't an issue. Everything will work as should , accept remote locking u will need to open from the hole.
matching number dont work, the bcm is all part of cars security alarm and immobiliser and is registered to that car only the keys and all ecu's are coded to each other so bottom line is if anyone wants the car to do what its meant to then new or cloned or repair is only options, also when it comes to selling the car its hard as people tend to check this stuff works correctly add to this anyone who has a car that has no work security ie alarm and dead locking etc ie when they leave belongs in it and dont want it stolen perhaps,, that could be a awkward insurance claim maybe,
 

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Mike1967, ur not right !! I have this used bcm in my mini so stop telling people to waste money on an old car!!!!, Everything works as should but remote locking as keys aren't programmed, immobiliser has 0 to do with bcm, go unplug ur bcm and u will realise car still starts but all features such as windows wipers,locks and all lights wont. Therefore, in mini cooper 1st gen modules aren't coded between to each other!!!! Mike u can argue with me but i can post pictures of my old bcm and my 2nd hand bcm uncoded!!! When i unlock from hole all doors and boot open no bother !!!
 

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Mike1967, ur not right !! I have this used bcm in my mini so stop telling people to waste money on an old car!!!!, Everything works as should but remote locking as keys aren't programmed, immobiliser has 0 to do with bcm, go unplug ur bcm and u will realise car still starts but all features such as windows wipers,locks and all lights wont. Therefore, in mini cooper 1st gen modules aren't coded between to each other!!!! Mike u can argue with me but i can post pictures of my old bcm and my 2nd hand bcm uncoded!!! When i unlock from hole all doors and boot open no bother !!!
your totally right i should stop telling people how to fix it correctly and how it works silly me from now on i will wind in my neck and stop,, the alarms systems the immobiliser and keys are all controlled by that bcm,, so i will carry on knowing the way it really is and let you fill people with how its not really, no argument
 

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Mike1967, ur not right !! I have this used bcm in my mini so stop telling people to waste money on an old car!!!!, Everything works as should but remote locking as keys aren't programmed, immobiliser has 0 to do with bcm, go unplug ur bcm and u will realise car still starts but all features such as windows wipers,locks and all lights wont. Therefore, in mini cooper 1st gen modules aren't coded between to each other!!!! Mike u can argue with me but i can post pictures of my old bcm and my 2nd hand bcm uncoded!!! When i unlock from hole all doors and boot open no bother !!!
add one other thing to this dont tell me to stop telling people how repair anything correctly, as for cloning the bcm's its a £60 plus a bcm from breakers then all the keys work also the car is secure also if ever gets stolen or broken in to no risk of insurance finding the car dont arm its security etc,,
 

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Honestly my mini dosent have an alarm, there would be red light on indicator stalk,
Remove ur bcm mike and put ur key in ignition ur car will start no bother.. therefore nothing to do with bcm but with ews... In case of accident i dont think they will check ur bcm, they will check ur abs module and ecu but not bcm ... But Mike if u have secound hand bcm from breakers then its not matched even cloned so insurance could be void if someone stole it anyway as production days will differ ...
 

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what do you think arms the system for central locking and alarm they all have factory that approved alarms and immobiliser central locking is run by the the bcm and is controlled my keys with rolling codes every time you lock of unlock the key code rolls as to stop people scanning the radio waves and gaining access,, the bcm then via canbus system what the ews system needs to switch on or off the immobiliser,, there is a fail safe where the key when in the ignition over rides the immobiliser and alarm system as long as key has the transponder chip in it this is how they all work from the factory,, all car makers signed up to a agreement with insurance company's to have min level of protection in all EU sold cars and vans,,, so reality is the key fob switches on and off via the above method hence why they are coded to car and key,, technically speaking its borderline or grey area within the law, ie fitting a bcm with another cars security details could be looked which bit is stolen maybe,,, this all aside think for £100 its by far better to be able to lock your car with one press of a button and also if out shopping and leave all nice new stuff i the car that its dead locked and alarm on etc,, this all said thats just my view
 

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Discussion Starter #16
add one other thing to this dont tell me to stop telling people how repair anything correctly, as for cloning the bcm's its a £60 plus a bcm from breakers then all the keys work also the car is secure also if ever gets stolen or broken in to no risk of insurance finding the car dont arm its security etc,,
so it doesn’t matter if the BCM is from a manual car even if mine is automatic? As long as I get it coded??
 

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so it doesn’t matter if the BCM is from a manual car even if mine is automatic? As long as I get it coded??
there is a difference between man and auto cars as in auto box as a ecu that is controlled via bcm,, never tried to do that before myself would think cant see why not,, that said i have always matched up the years and spec cars to be on safe side,, phone this guy he knows more about it than i do he can clone them and knows what works its cheapest way to keep your car as factory where keys and security system work as should and also that not driving around a car with another cars identity within its registered systems PHONE NUMBER 07807 222262 he's called dale he can do all kinds even mileage corrections ie if fitted a different set of clocks its possible to match the mileages back to what they were on the broken unit say, just mention i sent you along good bloke
 

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Discussion Starter #18
there is a difference between man and auto cars as in auto box as a ecu that is controlled via bcm,, never tried to do that before myself would think cant see why not,, that said i have always matched up the years and spec cars to be on safe side,, phone this guy he knows more about it than i do he can clone them and knows what works its cheapest way to keep your car as factory where keys and security system work as should and also that not driving around a car with another cars identity within its registered systems PHONE NUMBER 07807 222262 he's called dale he can do all kinds even mileage corrections ie if fitted a different set of clocks its possible to match the mileages back to what they were on the broken unit say, just mention i sent you along good bloke
thanks
i have just been looking at the BCM fitted and it’s completely dry. So no water has got to it. Could it still fail even without water ingress?
 

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thanks
i have just been looking at the BCM fitted and it’s completely dry. So no water has got to it. Could it still fail even without water ingress?
yep what goes wrong mostly is they have a number of soldered in relay circuit mounted and are prone to over heating and over loading and just plain wear on the relay spring part so either the coil will open circuit or the contact breaker inside over heats and that heat spreads to the spring when that happens things just stay on or go intermittent, also canbus is central to the bcm which can also be corrupted,, first off need to be sure its the bcm at fault and that is via checking all wires to and from switches and fuses etc,, that said have seen many go wrong and not one the same way,
years a go cars had simple relays you could just replace cost £5 now the car makers fleece people one relay can stop car in its tracks and soldered in to a box they done their best to make it non repairable so people would need to spend £800 from them to repair it
 

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yep what goes wrong mostly is they have a number of soldered in relay circuit mounted and are prone to over heating and over loading and just plain wear on the relay spring part so either the coil will open circuit or the contact breaker inside over heats and that heat spreads to the spring when that happens things just stay on or go intermittent, also canbus is central to the bcm which can also be corrupted,, first off need to be sure its the bcm at fault and that is via checking all wires to and from switches and fuses etc,, that said have seen many go wrong and not one the same way,
years a go cars had simple relays you could just replace cost £5 now the car makers fleece people one relay can stop car in its tracks and soldered in to a box they done their best to make it non repairable so people would need to spend £800 from them to repair it
thanks mike I have messaged dale
If I’m getting it coded then can I buy any BCM from a similar year even if the serial numbers are slightly different?
 
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