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Tekonsha
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Select your vehicle to confirm this part fits.
2010 - 2021 Lexus RX350
Confirmed to Fit
2018 - 2021 Lexus RX350L
Confirmed to Fit
2010 - 2022 Lexus RX450h
Confirmed to Fit
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Tekonsha Tow Harnesses are the replacement for your factory electrical connector to the back of your vehicle. These harnesses are used to link the wiring from your vehicle to the trailer when towing. Tekonsha Tow Harnesses feature custom designs to fit each vehicle make and model based on manufacturer specifications. Plus, the Plug & Play connectors on the end of the wires make it easy to install. No cutting or splicing!
Tekonsha offers the largest, most complete line of Replacement Tow Harnesses. Hit the road with the peace of mind only Tekonsha can provide. Life's a Journey. Stop Often.
| BRAND: | TEKONSHA |
| PART NUMBER: | 118252 |
| WARRANTY: | LIMITED 1 YEAR WARRANTY |
| WEIGHT: | 0.45 LBS |
| UNIVERSAL OR SPECIFIC FIT: | SPECIFIC |
| CIRCUIT PROTECTED: | NO |
| HARNESS TYPE: | MALE FEMALE |
| TERMINAL QUANTITY: | 4 |
| WIRE COLORS: | BROWN, GREEN, YELLOW, WHITE |
| WIRE QUANTITY: | 4 |
| WIRE GAUGE: | 18 AWG, .85 AVSS |
| POWER LEAD REQUIRED: | NO |
| ELECTRICAL SYSTEM TYPE: | 2-WIRE SYSTEM |
| HARDWARE INCLUDED: | YES |
Tekonsha is a leading manufacturer of electronic trailer brake controllers, pioneering the category in the 1970s. The lineup spans proportional units such as the Prodigy P3 and Prodigy iD, time-delayed controllers, the wireless Prodigy RF, plus vehicle-specific wiring harnesses, adapters and trailer brake components engineered for smooth, predictable stopping at any speed.
Tekonsha Engineering Company began in 1964 building RV steps and mirrors. Within a few years it had found its real calling, and by the 1970s Tekonsha was pioneering the manufacture of electronic trailer brake controllers, the product category that still defines the brand. More than half a century later it remains the reference name in trailer braking and is part of the Horizon Global group alongside Reese, Draw-Tite, Fulton, Bulldog and Wesbar.
A brake controller is the component that tells a trailer's electric brakes how hard to work and when, and getting that right is the difference between a controlled stop and a shove from behind. Tekonsha builds both major types. Proportional controllers use an internal accelerometer to sense how quickly the tow vehicle is slowing and apply trailer braking to match, so light braking stays light and hard braking is immediate. Time-delayed controllers ramp to a preset output over a fixed interval, a simpler and more economical approach that suits occasional towing.
The current brake controller range covers most of that ground. The Prodigy iD pairs with a phone through Tekonsha's EDGE technology for setup and monitoring, the P3 offers storable settings for multiple trailers and a trilingual colour LED display, the Prodigy P2 adds a dimmable display and boost mode for heavier loads, and the Voyager keeps operation simple and dependable. The Prodigy RF mounts to the trailer itself and controls wirelessly, which suits rental fleets and drivers who swap tow vehicles.
Installation is supported by vehicle-specific brake control harnesses that plug into a factory connector rather than requiring cut-and-splice wiring, along with mounting brackets and adapters. Matched controller bundles pair a unit with the correct harness. Products are tested to meet and often exceed published industry standards.
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3 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 2010 - 2021 | Lexus RX350 | Tow Harness Wiring Package Uses all existing holes. No Drilling required Install Time is 5 minutes |
| 2018 - 2021 | Lexus RX350L | Tow Harness Wiring Package Uses all existing holes. No Drilling required Install Time is 5 minutes |
| 2010 - 2022 | Lexus RX450h | Tow Harness Wiring Package Uses all existing holes. No Drilling required Install Time is 5 minutes |
Yes, the Tekonsha Tow Harness, 4-Way Flat TK118252 (Part #TK118252) is designed to fit the 2010-2021 Lexus RX350.
The Tekonsha Tow Harness, 4-Way Flat TK118252 (Part #TK118252) fits the following vehicles: 2010-2021 Lexus RX350; 2018-2021 Lexus RX350L; 2010-2022 Lexus RX450h. Always verify your specific year, make, and model before ordering.
The Tekonsha Tow Harness, 4-Way Flat TK118252 (Part #TK118252) fits 2010-2021 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 Tekonsha Tow Harness, 4-Way Flat TK118252 (Part #TK118252) Refer to the included instructions for installation details. Basic hand tools are typically all you need.
Yes, the T-Connector 118252-037 is designed for Lexus RX 350 and RX 450h vehicles. Your vehicle must have a factory tow harness connector installed behind the bumper for this product to work.
A T-Connector is a tow harness adapter that connects to your vehicle's factory tow harness connector behind the bumper. It allows you to plug in a tow plug to enable trailer lighting functions. The connector must be fully inserted and all connections must be complete for proper operation.
You need a test-probe to verify the installation. Cable ties are provided with the product to secure loose wires.
The factory tow harness connector is located behind the bumper. You will need to locate this connector before beginning installation.
1. Locate the factory tow harness connector behind the bumper. 2. Remove the factory protective cap from the connector. 3. Check that the mating surface is clean and free of dirt; clean if necessary. 4. Insert the tow plug into the connector, ensuring the connectors are fully inserted. 5. Secure all loose wires with the cable ties provided.
Yes. Before inserting the tow plug, remove the factory protective cap and check that the mating surface is clean and free of dirt. Clean the surface if necessary to ensure a proper connection.
Secure all loose wires with the cable ties provided with the product.
Test and verify the installation with a test-probe or by connecting an actual trailer once installed. All connections must be complete to function properly.
Do not exceed 7.5 amps for stop/turn lights and 7.5 amps for tail lights. Do not exceed the lower of your vehicle manufacturer's rating or these limits. Overloading the circuit can cause fires.
Wear safety glasses and use all safety precautions during installation. Read and follow all vehicle warnings and installation instructions before beginning. Consult your vehicle's owner's manual and instruction sheet for additional information.
Yes, the T-Connector 118252-037 is designed for Lexus RX 350 and RX 450h vehicles with a factory tow harness connector behind the bumper.
You need a test-probe to verify installation. Cable ties are provided to secure loose wires.
The manual does not mention drilling or vehicle modifications. Installation involves locating the factory connector behind the bumper, cleaning the mating surface, and inserting the tow plug.
Maximum 7.5 amps for stop/turn lights and 7.5 amps for tail lights. Do not exceed the lower of your vehicle manufacturer's rating or these limits.
Test the installation with a test-probe or by connecting a trailer. Ensure all connections are fully inserted and complete.
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Jennifer
Ordered online. Shipment arrived on time and with all the correct parts. Great customer service and friendly staff. Also, pricing was great!
May 22, 2023
