Burnt Fuel Pump Wires
 

With the help of member 80stech, I have traced my non-start issue of my E70 x5 4.8 to either the fuel pump or the fuel transfer pump.

Just yesterday, I took apart and removed the rear (comfort) seats. This allowed access to the fuel pumps under the seats. Upon removing the carpet, I can see that the wires have melted. Now I am not sure if this is normal and if it is the reason for the no-start with no fuel pressure. Has anyone experience this?

https://imgur.com/a/GrlAKwK

I might be wrong but I think that is a known issue and maybe even was a recall ??

Yeah, I think there was a recall, and I think it was done on my vehicle already in ~2017? Unless they botched the job or didn't replace anything. The wires seem to be in pretty poor condition. Should I contact BMW of North America if it is recall related?

Yes, you could try that.

Quickly looking at the recall information from the NHTSA government website: https://static.nhtsa.gov/odi/rcl/201...6V746-7192.pdf

I see that the wire that was melted on mine seems to be supposed to be part of the recall, and should be replaced? I want to make sure that I have valid reason to contact corporate BMW first.

I’d call your local dealer and tell them you have a car to bring in for the recall, vin: xxx. Let them sort it out. Maybe toss in the conversion the fact that the fuel pump wires seem to be shorting and arcing. That should get their attention.

I was digging through my service history receipts, and found that the Airbag and Fuel pump and harness recall was performed on Nov 7, 2017. And the car doesn't start, so I can only tow it to the dealer :(

Dealer receipt/report from 2017: https://imgur.com/a/Xwnqa2B

You can patch the wires to get it to run just leave the seat off and make sure everything is insulated.


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It's not really the wires that are the root of the problem it's excessive resistance in the connections.

If the connectors are melted then might be a solder situation. That's pretty scary to see. Hopefully that is covered under recall