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RIP #9
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Discussion Starter · #1 ·
Some day, and this day may never come, but I want to retrofit a heated steering wheel in my E39. I want to do it right (i.e., wire to and from the fuse panel in the glove compartment) but I am having a difficult time finding the correct wire.

Per BMW WDS, I need 0.75 mm^2 green/black striped wire, 0.75 mm^2 brown wire, and 2.5 mm^2 green wire. Part numbers on RealOEM do not exist for "exactly" these types/colors of wire.

I suppose I could use 18 and 14 AWG wire, respectively, but that too is hard to find.

Any suggestions, other than going to a junk yard and hopefully finding an E39 with a heated wheel? I really don't want to have to gut a junked E39 just for a few feet of wire.
 

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971 Posts
I get my wire from Jaycar electronics here...
I don't know what the equivalent is on your side of the pond.

Sent from my SM-G930F using Tapatalk
 

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If it helps, the exact conversion for your metric sizes are:
0.75 mm2 = 18.4 AWG, so 18 AWG is almost a perfect match and slightly oversized vs the metric
2.5 mm2 = 13.2 AWG

To help in choosing between 12 & 14 AWG here are the ohms/meter for each size
2.5 mm2 -> 6.9 milliohms / metre
14 AWG -> 8.3 milliohms / metre
12 AWG -> 5.2 milliohms / metre
 

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RIP #9
Joined
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1,428 Posts
Discussion Starter · #8 ·
If it helps, the exact conversion for your metric sizes are:
0.75 mm2 = 18.4 AWG, so 18 AWG is almost a perfect match and slightly oversized vs the metric
2.5 mm2 = 13.2 AWG

To help in choosing between 12 & 14 AWG here are the ohms/meter for each size
2.5 mm2 -> 6.9 milliohms / metre
14 AWG -> 8.3 milliohms / metre
12 AWG -> 5.2 milliohms / metre
Thanks, rdl!
 
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