[Bimmer335i07]

Since there doesn't seem to be a DIY on here for the JB3 2.0 USB install. I made a short write up on how to route the USB through the engine bay's firewall into the passenger side footwell. Then after that you can just run it up into the glove box. I'm sure everyone knows how to get into their DME and into their fuse box in the glove, so I'll leave that info out. lol!

Disconnect the negative terminal to battery.

1. Inside the passenger side footwell, below the glove box. Use a T8 torx bit or T8 torx screwdriver to remove the 2 screws where the yellow arrows are pointing and let the plastic cover lay on the floor.



2. Go into engine bay to the DME box and unclip the plugs where the red arrows are. Every car is different because of options. So, mine might have more plugs than yours and some might have more or less than mine, but if you see plugs there, just unplug them. Don't worry about remembering which position it was taken out, it can only go back in one way. And it's all color coded, BMW FTW! lol!
(The reason for unplugging the plugs, is so that it'll make it easier to remove the plastic dividers later on.)

3. Pull out the rubber grommets where the yellow arrows are.
(This way, you can move the wires towards the headlights to give you more room to remove the DME, plastic dividers and the small plastic box that holds the DME.)



Once everything is unplugged and pulled out. Pull all the wiring harnesses towards the headlights and it should look like the pic below.

4. Pull the tabs where the yellow arrows are and remove the DME.

5. Pull the tab where the red arrow is to remove that divider.

6. Pull the tab where the green arrow is to remove that divider.



Once the DME and the dividers are removed, it should look like the pic below.

7. Remove the small box that holds the DME and the dividers.



Once the box is out, you'll see a hole where you will push the USB wire through.

8. Push the USB cable straight down, don't need to use a lot of force, just stick it down and you'll see it in the passenger side footwell. Just push it through probably about an inch or two.
(Don't need any type of hanger or wire.)



9. Go to the passenger side footwell in the middle and you should see the USB cable sticking out.







Once the USB is through, pull as much of it as you can and route it up into the glove box.

Once the USB cable is through, just go in reverse and put everything back. Once everything is put back together, plug the negative terminal back onto the battery and test to make sure everything is good. After running the USB cable through the firewall, you can follow Terry's instructions on the 2.0 upgrade.

That's it!



There might be easier ways to do this DIY, but I found this to be the easiest way for me. I have done 2 cars so far, mine and another member's and it's pretty straight forward.

GL!

[nemith]

I did all of this without pulling out the grid, just the DME.

[Bimmer335i07]

Originally Posted by nemith

I did all of this without pulling out the grid, just the DME.

That is true, but pulling out the box makes it that much easier.

[335Caliber]

awesome write up

[Jeff@TopGearSolutions]

No way you can snake that in without removing everything? Thanks for the write up btw.

[DMA]

Originally Posted by JPSlick

No way you can snake that in without removing everything? Thanks for the write up btw.

There is no way I could find I tried to snake a wire through the inside of the car to the ECU box and then tape the USB cable and pull it back no luck getting the wire to the ECU box gave up in about one minute. Thanks to this DIY I was able to get the cable to the glovebox but it was scary pulling everything out of the ECU box. Cant say it was really hard but definitely not easy the first time. If i had to do it again I would be alot more confident now.

Great writeup!

[Bimmer335i07]

Originally Posted by E9TWO

There is no way I could find I tried to snake a wire through the inside of the car to the ECU box and then tape the USB cable and pull it back no luck getting the wire to the ECU box gave up in about one minute. Thanks to this DIY I was able to get the cable to the glovebox but it was scary pulling everything out of the ECU box. Cant say it was really hard but definitely not easy the first time. If i had to do it again I would be alot more confident now.

Great writeup!

Glad it helped!

I know exactly what you mean. I was nervous my first time, too! lol! But BMW built the wiring harnesses really well. As long as you're gentle with the wires, it's easy sailing.

[pcmike]

Just an FYI.. on my 2009 335i Sedan the Torx bolts in the first step (passenger side footwell) are T20s.. not T8s.

Also, I have a question... there is a light down there that is attached with a black cable coming out from under the glovebox. How does this black cable attach into the clear piece of plastic its going into? I tried pulling it out (with quite a bit of force) and it will NOT come out. I don't see any clips or anything holding it in. Anyone have any idea?

[Bimmer335i07]

Originally Posted by pcmike

Just an FYI.. on my 2009 335i Sedan the Torx bolts in the first step (passenger side footwell) are T20s.. not T8s.

Also, I have a question... there is a light down there that is attached with a black cable coming out from under the glovebox. How does this black cable attach into the clear piece of plastic its going into? I tried pulling it out (with quite a bit of force) and it will NOT come out. I don't see any clips or anything holding it in. Anyone have any idea?

It should just pull right out. Try shining a flashlight on it and see if there are any tabs. On my 2007, it just pulls straight out, with little force.

GL!

[pcmike]

Ya, it definitely didn't pull right out for me and I had a flashlight on it and didn't notice any tabs. Oh well, I just let it hang down while I routed the USB cable. Got everything routed nicely. Thanks.

[SSDD]

Thanks for the DIY. The pictures of where the usb cable shows up inside the car really helped me. Cheers

[Silver335i]

Thanks for the excellent write up - I was able to get mine installed today thanks to this!

One thing I did that was a bit of a time saver and worked for me: I did not remove any of the cables out of the ECU. Instead, I lifted the 4 grommets and lifted up the entire assembly intact without disconnecting any of the connectors. It didn't come out far, but was enough for me to snake the cable down into the hole and into the car.

[Bimmer335i07]

Originally Posted by SSDD

Thanks for the DIY. The pictures of where the usb cable shows up inside the car really helped me. Cheers

Glad the pics helped.

[GQ335i]

Fantastic writeup! Thanks!

[sear]

Awesome pics and annotations! This was a breeze with this DIY. Was able to run the cable after just removing the DME. (didn't have to remove the DME box and cabling on headlight side of the ECU box)

thanks!