How to build ENET cable for F series coding

There are basically two ways to get the BMW ENET cable, to buy a complete one or simply build one by yourself. Read the following to get it.

One way is to build a cable yourself. Cost for this would probably range anywhere between 10 to 20 bucks. You will need to solder a bit but it’s nothing too serious if you follow the instructions to the letter.

To build your own cable, you will need the following:

– OBD2 connector
– RJ-45 cable and connector
– 510 ohm .25 watt resistor

The schematics of the official BMW cable can be found below in the attachments and how to solder your cable can be seen in the photos directly below (thanks to Sean [ImSW1]).

Cable soldering diagram:

The cable is CAT 6

PIN 3 – light blue (CAT 6) would be Green Stripe (CAT 5e)

PIN 4 & 5 (bridged) – Brown (0CAT 6) would be Brown (CAT 5e) – this is what is grounded to the RJ-45

PIN 11 – Green (CAT 6) would be Solid Green (CAT 5e)

PIN 12 – White (CAT 6) would be Orange Stripe (CAT 5e)

PIN 13 – Orange (CAT 6) would be Solid Orange (CAT 5e)

PIN 8 & 16 (bridged) with a 510ohm, 1/4 watt resistor

ENET-cable-diy (1) ENET-cable-diy (2) ENET-cable-diy (3) ENET-cable-diy (4)

Free download “Step-by-step ENET diy manual” – 100% understandable

(NOTE: this diy guide is from utenigma and svache at, i have not tried, put it here)

But if you are not interested in building one and want to spend a little bit more money to buy a working cable, then this is a site that has been confirmed working by some of our F10 friends: I wouldn’t recommend other sites, although they may work, problem is that they have not been confirmed working yet. Functions of enet cable at obdtool has been tested for years (many discussion in forums).

I have used my own cable there for half a year. His cables are great. He builds and ships them for $12 USD only. Usually, after he receives payment, he can have the cable ship the next day and arrived a week later.


Most people will buy:

ICOM A2+B+C Wireless Diagnostic Programming Tool for BMW with V2015.10 BMW Rheingold Software:


This is from obdtool: Best car diagnostic tools for sale website technical support