[AndrewC1989]

I have a non M sport 328 that came with steering wheel heating.

I bought a heated M Sport Steering Wheel, buttons and airbag.

I bought a control unit for it that supports heating:

https://www.ecstuning.com/b-genuine-...t/61317849393/

And I got the connecting line as well:

https://www.ecstuning.com/b-genuine-...e/32307848331/

I checked that these were the parts I needed using realoem.com

I put it all together and the wheel doesn't heat up. What am I missing?

No check engine lights are on and when I press the heating button a message displays saying it's on/off but the wheel itself isn't getting warm.

Do I need to code anything? I would think not since my car came with a heated wheel...

[Jhnblckwood]

Try connecting with ista and see if any fault errors pop up.