Will Hopkins HM11143910 Work On A 2021 Lexus LX 570?
Updated 10/22/2025 | Published 03/30/2025
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Question:
Hi I have a 2021 Lexus LX with a factory wiring harness 2 plugs - one 4 wire and 1 2 wire mounted under the right rear frame. I’m looking for a flat 4 connection for my boat. Will your part number HM11143910 Work for my application. Thanks,
asked by: Robert D
Expert Reply:
Hello Robert, thanks for reaching out. According to Hopkins, the # HM11143910 is only for the 2008-2018 Lexus LX, so I would not be able to confirm fit for the 2021 model. The plugs may be similar but it likely would not be wired/pinned correctly for the 2021 model so you might run into things like blown fuses or incorrect light function.
You might want to check and see if Lexus offers an OEM harness for the 2021 model. Otherwise, the only safe way I can recommend for adding a 7-way would be using universal wiring options. The # 119250KIT along with the # ETBC7 kit would contain everything you need to add 7-way including all of the necessary wires for a brake controller.
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Jesse M.
10/22/2025
Hey Robert, were you able to find a wiring harness that fit your 2021 Lexus LX? Knowing what ended up working could help others trying to wire their newer models for towing.