Through process of elimination I'm pretty sure my JBE has gone kaput on my car. I've got a cranking no start situation. I've replaced the hpfp, fuel filter, lpg and did a walnut blasting about 15,000 miles ago. I ordered a jbe off of parts geek cause that's all I can afford right now and it showed up yesterday. None of the markings on the new one match up with my original one. I was wondering if someone could tell me if it's there right one before I install it. Im afraid if I install it and it's the wrong one it might fry it and then I wouldn't be able to return it. There one that says R56 it my original one.

 

According to realoem.com this box came from a JCW. It will work on both JCW N14 and JCW N18 engines. I also went on Ebay and typed your p/n (3455438) and found few ones for 126 obo and two broken case ones.

 

Thank you that's what I was hoping to hear. Is this just a plug and play deal or does it need to be programmed for the car?

 

For the most part, it is plug and play. Personally I like to match them to the car and for that I use WinKfp and NCS expert.

 

I've installed the new box and nothing is working so I'm assuming it needs to be programmed. I'm installing the winkfp software on my computer and just bought a cable off of Amazon which I should have tomorrow. Anything I need to know before trying to program it?

 

you need the SPdatens to load into Winfkp. I usually buy a used fuse box because they are cheaper and known to be working on the donor car. At any rate, Winfkp should do the job and you also need NCS expert to code it.

 

Correct me if I'm wrong, but that box only contains fuses and relays? How does one go about programming fuses and relays?

 

this fuse box is not like the one from the 90s. there are electronic switches and a CPU that activate the relays. since this is a smart hardware, there must be some sort of software to control it or communicate with the system as a whole.

 

I've seen the JBE fail and cause a no start. But trying to get a used one is hard has there are a few different ones and I've never had luck having a used one that was the exact same as the failed one so I've always just got a new one when they fail.

But yes it does have to be coded to the car. This is how it knows what options the car has and what needs power as this distributes it to the car.

You can likely plug it in and see if the car starts. If it does you know that was the issue. If it doesn't it still may be the issue, but may also be something else.

 

So I installed the new box and it still cranks but won't start. Plus the tail lights and dash stays on after I remove the key and everything. I went to a European car shop today and they have a guy that can code it. I'll be towing it there in the morning and hopefully be driving it by the afternoon.

 

Any updates?

 

So I finally threw my hands up and took it to a shop. They had it for a month and threw their hands up. I broke down and took it to the dealer. Long story short I was right to begin with. It was the low pressure fuel pump. The new one I bought was bad but since it was brand new I assumed it was good and I ended up chasing ghosts. I got the car back about 3 weeks ago and it's running line a champ.

 

Did you change the fuel pump and also the fuse box I (jbe)?

And if it was the JBE, did they have to reprogram it?