Nissan Qashqai / X-Trail / Rogue Smart Key - BCM's That Are Dangerous

**jodge** · 3rd October, 2019, 09:27 AM

For me it's simply. I always tell to the customer this problem (with the simpliest ways possible) and asking a written permisson. Every responsibility is theirs.

**rapidlocksmiths** · 3rd October, 2019, 10:39 AM

getting customer permissions or disclaimers or permission to proceed at their risk signed up may protect some but not others , its not something id like to take a punt on with british courts and uk trading standards , the legality of such a document with our snowflakes is questionable at best.

**jodge** · 3rd October, 2019, 11:08 AM

Originally Posted by rapidlocksmiths

getting customer permissions or disclaimers or permission to proceed at their risk signed up may protect some but not others , its not something id like to take a punt on with british courts and uk trading standards , the legality of such a document with our snowflakes is questionable at best.

Yepp thats the reason why i asked my lawyer to wite this permission form. She have an insurance too

But without joking...no one ever take a risk after i correctly told them the situation. My advice is always the same: try it with the dealer but with insurance covered. (There is an insurance form here if you take the 10% the other 90% cost is on the insurance company) maybe the dealers messing with a single car owner but never with the insurance companies

**BenzMan** · 1st May, 2020, 02:57 AM

if BCM is bricked. will there be Faults or DTC in any off the modules.?

tnx

**fred77** · 1st May, 2020, 12:46 PM

Originally Posted by BenzMan

if BCM is bricked. will there be Faults or DTC in any off the modules.?

tnx

The fact car doesn't start no more might be a clue

but would of thought so

**sleepyrz** · 1st May, 2020, 02:04 PM

I'm surprised by the fact that nobody seems to know what exactly happens to these BCM to make them brick

Anybody got any idea?

**BenzMan** · 1st May, 2020, 04:43 PM

i have 2015 nissan Rogue,

all keys lost (proximity)
BCM 284B 14BA1A

no DTC in BCM

proximity key is new unlocked

in the procedure after touching the Start Button with Remote. dash should light up and security light should blink 5 times. Does not happen.

**A22** · 1st May, 2020, 05:15 PM

I thought truecode was safe to use on these, apparently it detects the effected types and warns the user, i dont have that module and and never done 1, as their not popular in my country

**BenzMan** · 1st May, 2020, 09:23 PM

can a used bcm with same part number be adapted?

**sleepyrz** · 2nd May, 2020, 04:13 AM

Nobody even knows why it gets bricked so maybe?

**godfathertre** · 2nd May, 2020, 05:42 AM

Why would you risk it surely the job does not pay enough if you accidentally brick one plus not all known bcm module have been found so not safe enough do these jobs why risk.

**armpower** · 2nd May, 2020, 09:46 AM

Hallo

Interesting topic.
Will BCM failure only happen with proximity key version ?
Recently I've done two Qashqai 2017 with regular remote key (not proximity) without problems.
I've coded the keys with Con sult3 connected to a J2534 interface.I've used AVDI to generate the PIN code and insert manually in the software.
It's interesting to see if this Bcm' failures are possible only with aftermarket key tools or happen also with original tool.
Only a Nissan expert or autorizhed workshop can answer this question i guess.
If only aftermarket key tools are responsible of BCM failure than Con-sult 3 plus Pin code generator are the only safe solution.

**rapidlocksmiths** · 2nd May, 2020, 11:08 AM

mechanical keys / flip are not affected by this , these are safe to do , this only affects the proximity keys , and even the main dealer tool kills these as well , no tool can do an affected unit not even consult , this is why the dealers had a technical service bullitin warning them of this issue and the new parts required to sort the car. new bcm , new steering lock and one other unit i read somewhere. so if a bad unit then your consult will also kill it.

truecode is safe in as much as it warns you of the bcm serials it knows to cause issues , but it doesnt know them all as at least 2 not listed were killed on here with different serials to truecode lists .

bear in mind some have had success on all of the known bad bcm serials , and some seem to be 50/50 pot luck , so the risk is there on all proximity systems for these , its up to you if you want to risk it or not , what is crucial on these is voltage so if taking a chance use decent battery support unit to maintain voltage , those succeeding on some of these all had in common that they used good battery support , alot who killed them did not , so may be a factor .

the deciding factor for most is Risk versus reward , is the profit worth the risk and how many cars miust you do to recover the loss from having a go.

**armpower** · 2nd May, 2020, 11:26 AM

Thank you rapidlocksmiths

It's the sort of info we need to avoid loss of money and also image.
It's better to send the car to main dealer.Probably in event of BCM failure the dealer is supported by Nissan (with new spare ).
Probably is a bug in Bcm internal firmware.
The next interesting thing will be.Anyone with bricked BCM have tried to read MCU or eprom to see if it's reparable?
Thanks to all for valuable info and shared expertise.

Cheers

**jodge** · 2nd May, 2020, 06:19 PM

Originally Posted by BenzMan

can a used bcm with same part number be adapted?

nope i was readed and following all stories here and other fourms too. Only dealer. If they find an affected BCM they must have to replace before the key learning. Somebody posted a service bulletin about this. If the car already killed they will need engine ecu, (bcose the dealer not virginize used ecu) bcm, and 2 keys plus online coding with Consult . Fckn fortune

PS: and the BCM mcu is with locked JTAG port no way to read or write only OBD