Curt Trailer Wiring Harness Plug Locations for a 2020 Lexus RX 350 L

Updated 06/04/2024 | Published 05/27/2024

Question:

I have a 2022 Lexus RX350L w/o towing package and has an e-trailer hitch I installed last year, which disabled the rear door sensor under the bumper. I have located the two female connectors in the rear drivers side area. It looks like the 10-pin connector will connect to the e-trailer module box connector correctly for this C56217 part. However the connector for the 4-pole connector will not. Do you have another similar package w/ 4-pole connector that will connect to this ~16-pole connector, labelled 16-8218 in the attached pictures ?

asked by: Paul J

2020 Lexus RX 350 L Driver Side Cargo Connections
(click to enlarge)

Expert Reply:

Hey Paul, thanks for reaching out and providing your photos!

The Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C56217 should all be plugging in in the center of your vehicle under all of the trim panels as opposed to near the driver's side on your 2020 Lexus RX 350 L. If you check out the linked photo and installation video of this kit on a 2019 Toyota Highlander to help demonstrate this.

Older model vehicles (2008-2013) had the connections on the driver side, but newer models (2014+) have them in the middle.

expert reply by: Jon G

Paul

6/1/2024

I'm pretty sure my 2022 RX350L does not have the same wiring configuration as the 2019 Highlander. I pulled all the items from the inside rear cargo area and the wire has no similar connections to the Highlander, and in fact is in the back rear driver's side as my picture indicates. I also found this very helpful discussion about the 2018-2022 RX350L here: https://www.clublexus.com/forums/rx-4th-gen-2016-2022/894623-trailer-hitch-for-rx350l-3.html And it looks like I may need to remove the bumper to access the 4-pin plug (see my last posting on the above Lexus thread with the video I found & re-posted, via my bcspeed24 account). Let me know if you have any other suggestions, since I'd love to use the C56217 kits and be able to plug-in the relay and 4-pin plugs w/o splicing existing wired? And really odd (to me) that the RX350L w/o tow has this connector that even my local MD Lexus parts dept cannot match with anything useful for towing? Oh well.

Jon G.

6/4/2024

@Paul Would you be able to send the photos of the connectors (or lack thereof) at the cargo location in your vehicle - right behind and below where the tailgate opens up? Curt lists this as a fit for your vehicle, but we haven't installed this kit on our end yet. If you've got some photos showing that area I can reach out to our fitguide team and see if this is something that is still viable on our site.