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Verify Fitment
Select your vehicle to confirm this part fits.
2010 - 2015 Lexus RX350
Confirmed to Fit
2010 - 2019 Lexus RX450h
Confirmed to Fit








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Plugs into vehicle tail light assembly to provide a 4-way flat socket
Installation Point(s): S4, S5

| Converter Type | Circuit Protected, Powered, Potted |
| Electrical Package Type | Packaged |
| Electrical System Type | 3W |
| Material | THERMOPLASTIC RUBBER |
| Tail Light Circuits | 6.0 Amps |
| T-Connector Location | S4,S5 |
| Turn and Brake Circuits | 3.0 Amps |
| Warranty | One-Year Limited Warranty |
If your vehicle is not equipped with wiring for towing a trailer, CURT custom wiring is the ideal solution. A custom wiring harness -- also called a T-connector -- is a simple, plug-and-play electrical device that plugs into your automotive electric system and provides a standard, universal trailer wiring connection. This is done using two or more vehicle-specific, OEM-compatible connectors to plug into the taillight assembly, eliminating the need for cutting, splicing and soldering during installation. Custom wiring harnesses are made vehicle-specific, and while they are not available for all vehicles, they do offer one of the fastest, easiest and most secure ways to wire a vehicle for towing. This particular plug-in harness provides a 4-way flat connector socket and is designed to be a custom wiring harness to fit certain years of the Lexus RX Series (to verify your vehicle compatibility, see application info). It comes with all necessary wiring components to establish a reliable trailer wiring connection, as well as a dust cover to keep the connector clean when not in use. You have a picture in mind of your next destination -- maybe it's the boat landing at your favorite fishing spot, maybe it's a campsite that overlooks one of nature's masterpieces, or maybe it's the next big jobsite. However, turning that picture into a reality takes more than just daydreaming. It takes a solid connection and the right amount of power. CURT custom wiring is made with some of the most sophisticated technology in the industry and is designed to install with ease, giving you a long-lasting electrical connection for your towing hitch setup.
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Yes, the CURT 56563 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Lexus RX Series (Part #BKDK56564) is designed to fit the 2010-2022 Lexus RX350.
4 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 2010 - 2015 | Lexus RX350 | — |
| 2016 - 2022 | Lexus RX350 | VIN begins with 2 |
| 2010 - 2019 | Lexus RX450h | — |
| 2020 - 2022 | Lexus RX450h | VIN begins with 2 |
The CURT 56563 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Lexus RX Series (Part #BKDK56564) fits 2010-2022 Lexus RX350 models. The 2022 model year is the last year covered by this part number. For newer models, check for an updated version.
The CURT 56563 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Lexus RX Series (Part #BKDK56564) fits the following vehicles: 2010-2022 Lexus RX350; 2010-2022 Lexus RX450h. Always verify your specific year, make, and model before ordering.
The CURT 56563 Vehicle-Side Custom 4-Pin Trailer Wiring Harness, Fits Select Lexus RX Series (Part #BKDK56564) Refer to the included instructions for installation details. Basic hand tools are typically all you need.





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