Car will not start after incorrectly connected the jumper cables

Hi,

Unfortunately, this all to commonly causes modules to fail and sensors to fail. There is no way I can tell you for sure what is causing the vehicle to not start because when you reverse the polarity of the electrical system it damages the sensitive components such as the PCM.

What I would suggest is to have the vehicle scanned with a scan tool and see if you are able to communicate with the PCM and other modules. If not, they are most likely damaged and will require replacement.

This type of issue is similar to the vehicle being struck by lightening. You may want to contact your insurance company and tell them what happened because most cover this type of incident because it happens more than you would think.

Let me know if you have questions and we can go from there. Thanks

Okay. Yeah. Wiring and the ECM/PCM are the first to go.

Here is a link to one that appears to work. You said in the header that this was a 1.6L V6. I assumed you meant 3.6L. If so, this will work but it is used so you have no idea what you are getting.

https://www.ebay.com/itm/10-11-VOLKSWAGEN-PASSAT-06J-907-309-A-COMPUTER-ENGINE-CONTROL-ECU-MODULE-L1254-/401206757593

This links is for Rockauto.com that has one for just over $900. Not sure what the dealer was charging but this would be a new ECM so I am sure it comes with a warranty. You may have to copy and paste this in a browser because they don't always paste on this post correctly.

https://www.rockauto.com/en/catalog/volkswagen,2011,cc,3.6l+v6,1447505,electrical,engine+control+module+(ecm+computer),2896

I see how difficult this is. Unfortunately, I am not able to find this module. Part of the issue may be I am here in the States and this is an export engine only so there will not be any sourcing here because the engine is not offered in NAFTA. Which is why RockAuto doesn't even list the engine.

I agree that I would not pay the asking price. I cannot be certain but it appears the value of the car is about $3,500.00. Clearly this may be off in Dubai but if it is close, I would not put that kind of money into a car if the value is about even. It is better to cut your losses and put that money into another vehicle.

I would suggest calling around to local shops and see where they get their parts. Obviously, they are not going to pay the dealer price if it is that high.