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Will a Wiring Harness From a Tesla Model Y Also Fit a Model 3?

Question:

Can i use 118831 in Tesla model 3

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Expert Reply:

The Tekonsha harness you referenced, our part number # TK56FR, is specific to the 2021 Tesla Model Y, so I cannot recommend it for your 2020 Model 3. With that being said, we do have a few options available for your vehicle.

First will be the Tekonsha ZCI Circuit Protected Vehicle Wiring Harness # 119250KIT. Other than a wire that will need to run to a battery, this will require absolutely no cutting or splicing to install. This can be a bit of a difficult install though, so I included an install video we did on a 2018 Model 3 for you to check out.

If you do not mind cutting and/or splicing into your wiring, we do also have the Tekonsha Upgraded Heavy Duty ModuLite Circuit Protected Vehicle Wiring Harness # 119190KIT. Again, this will require splicing into the wiring, but is a much more standard and straight forward installation.

Between the two options we have, I honestly prefer the # 119250KIT. It is a more difficult install and will cost more, but there is absolutely no possibility of this back-feeding. With the amount of computers and other technology in your vehicle, this is the safest and best way to go.

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Lazer S

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