Trailer Hitch prewiring on 28i vs 35i? - Bimmerfest - BMW Forums

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Old 04-30-2013, 08:48 AM
aberrant aberrant is offline
just some random guy
Location: San Francisco
Join Date: Apr 2013
Posts: 188
Mein Auto: 2014 X3 35i
Question Trailer Hitch prewiring on 28i vs 35i?

Hi all,

I just noticed that Trailer Hitch Prewiring (8SL) is standard on MY14 28i but not on 35i. If I want a trailer receiver (for a bike rack) on my 35i, what does this mean?


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Old 04-30-2013, 09:10 AM
BMWDude49120 BMWDude49120 is offline
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Location: Niles, MI
Join Date: Apr 2013
Posts: 52
Mein Auto: 2014 X3 35i M Sport
The trailer hitch wiring is also standard on the 35i. It just isn't listed for some reason, but it is there. You are all set.
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Old 05-01-2013, 03:43 PM
invisihitch invisihitch is offline
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Location: Atlanta
Join Date: Nov 2012
Posts: 431
Mein Auto: 2012 X3
I agree. I have no idea why the 8SL tow-prep wiring is listed on the 28i but is not listed on the 35i. We have installed the OEM tow harness on many 35's and the factory connectors were always present and functional.

Also, if you plan to only use the hitch for a bike rack and not for towing, you may want to consider unbundling the hitch kit. We sell the invisihitch separate from the OEM harness for exactly this reason. It saves you the cost of the harness and the reprogramming fee.

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