





















































Curt TriFlex NEXT Electric Trailer Brake Control For 03-14 Toyota Tundra
Model: CU12FITrailer Brake Controller Harness
Installation Hardware (if required)
Installation Instructions (if required)
Installation Schematics & Diagrams (if required)
This Brake Controller Fits The Following Vehicles:
- 2003 - 2014 Toyota Tundra All Models
CURT 51146 TriFlex NEXT Proportional Inertia Electric Trailer Brake Controller, Fully Adjustable, Low Profile, 2-4 Axles, Plug-and-Play (QTY 1)
Manufactured by: Curt
Experience highly responsive and smooth stops with the TriFlex NEXT brake controller Equipped with a triple-axis, motion-sensing accelerometer, it ensures precise braking performance The third axis dynamically adjusts power when navigating uphill or downhill terrains, further enhancing control.
Enjoy the convenience of automatic leveling and calibration, eliminating the need for setup and providing peace of mind on the road Built-in reverse-polarity and short-circuit protection add an extra layer of safety during towing Stay informed about your tow vehicle's voltage and trailer disconnect status through the convenient indicators.
The clean and user-friendly interface offers a full-text readout and troubleshooting capabilities, simplifying operation and maintenance The TriFlex NEXT brake controller offers exceptional control over 2-8 trailer brakes at a time (1-4 axles) Its adjustable settings effortlessly adapt to your unique vehicle-trailer configuration.
Compatible with low-volt, PWM, ABS, cruise control, and electric over hydraulic brakes, its slim profile combines functionality with a modern aesthetic Monitor your brake settings at a glance using the LED display that showcases power adjustments in 0.5 increments The display also provides full-text diagnostics for easy troubleshooting.
Adjust the brightness to ensure optimal visibility during day or night towing Fine-tune your towing experience with the TriFlex NEXT proportional brake controller It offers fully adjustable power and ramp time, allowing you to customize the settings according to your specific needs.
Choose from 10 gain settings and nine load settings to achieve precise control The LED screen clearly displays the ramp-up progress, and the brightness can be adjusted to match daytime or nighttime towing conditions With versatile mounting options, you can install the controller anywhere in your vehicle at any desired angle..
Features:
- Slim, low-profile design for a functional, modern aesthetic
- Unique bracket system for improved dash clearance
- Triple-axis, motion-sensing accelerometer for highly responsive, smooth stops
- Third axis provides dynamic power adjustments when going up or down a hill
- Operates 2-8 trailer brakes at a time (1-4 axles)
- 10 gain settings and 9 load settings to adapt to various driving conditions
- LED display shows power adjustments in 0.5 increments
- Clean, easy-to-read interface with full-text readout and troubleshooting
- Day-night mode and adjustable brightness for optimal visibility
- Auto-sleep mode prevents battery drain after five minutes of idle time
- Automatic leveling and calibration eliminate setup requirements
- Built-in reverse-polarity and short-circuit protection
- Tow vehicle 'low voltage' and trailer disconnect indicators
- Compatible with low-volt, PWM, ABS, cruise control and electric over hydraulic
- Mounts anywhere in the vehicle, at any angle
- Plug-and-play install with vehicle-specific quick plug harness (sold separately)
CURT 51362 Quick Plug Electric Trailer Brake Controller Wiring Harness (QTY 1)
Manufactured by: Curt
A CURT Quick Plug brake controller wiring adapter is one of the fastest and easiest ways to plug your brake controller into your vehicle It requires no cutting or splicing! Just insert the vehicle-specific plug end into the OEM vehicle’s factory brake controller socket The other end plugs into your CURT trailer brake controller.
Quick Plug harnesses are available for a variety of vehicles and are unique for each vehicle application to provide the easiest possible installation This particular brake controller harness fits certain years of the Toyota 4Runner, Land Cruiser, Sequoia, Tacoma, Tundra, Lexus GX460, GX470, LX470, LX570 and LX600 (see application info to verify fitment) CURT Quick Plug harnesses are compatible with most CURT brake controls and can be used as a replacement or for a new control unit installation.
They're also great for towing all types of trailers with electric brakes For versatile mounting of your trailer brake controller this Quick Plug wire harness measures two feet long It also features a slit loom sleeve to keep the wires protected against crushing and abrasions.
CURT Quick Plug wire plug-in adapters are made with 12-gauge wires for a reliable connection and braking, and come with zip ties to keep the harness contained and out of sight..
Features:
- Allows a CURT trailer brake controller to be plugged into OEM socket
- Quick plug harness installs with plug-and-play convenience
- Wire colors match standard brake controller harnesses
- Includes 24" of 12 gauge wire for flexible installation
- Slit-loom sleeve keeps wires contained and protected
List of Fitment Years:
2014, 2013, 2012, 2011, 2010, 2009, 2008, 2007, 2006, 2005, 2004, 2003$161 81 $180.90 11% OFF
- Best Price on Web Guarantee
- Fastest Shipping
- FREE Shipping
- In Stock

We match lower prices from major authorized retailers for brand-new products in original packaging, provided the item is in stock. The competing seller must be an authorized, professional retail business; offers from
individuals, auctions, peer-to-peer sites, or unauthorized sellers don’t qualify. Used, refurbished, or open-box items are excluded.
Please see our full terms for details.
Verify Fitment
View products that fit your vehicle
Fits 's with the following styles:
View products that fit your vehicle
Fits 's with the following styles:
$180.90 $161 81
Questions? Call our Auto Experts at (877) 869-6690
Get it now, pay later
Select installments at checkout to split your purchase into 4 interest-free payments of $ every 2 weeks.
- No fees, ever.
- No impact on your credit score.
Payment options are offered by Affirm and are subject to an eligibility check and might not be available in all states. CA Residents: Loans by Affirm Loan Services, LLC are made or arranged pursuant to a California Finance Lender license.
Installments in partnership with
.
Affirm and its offerings are supported in English only. Translations are not provided by Affirm.
Product Details
- Brand: Curt
- Model: CU12FI
- Includes: TriFlex NEXT Brake Control, Plug Adapter
Compatibility Chart
Year Range | Make | Model | Style |
---|
Description
Trailer Brake Controller Harness
Installation Hardware (if required)
Installation Instructions (if required)
Installation Schematics & Diagrams (if required)
This Brake Controller Fits The Following Vehicles:
- 2003 - 2014 Toyota Tundra All Models
CURT 51146 TriFlex NEXT Proportional Inertia Electric Trailer Brake Controller, Fully Adjustable, Low Profile, 2-4 Axles, Plug-and-Play (QTY 1)
Manufactured by: Curt
Experience highly responsive and smooth stops with the TriFlex NEXT brake controller Equipped with a triple-axis, motion-sensing accelerometer, it ensures precise braking performance The third axis dynamically adjusts power when navigating uphill or downhill terrains, further enhancing control.
Enjoy the convenience of automatic leveling and calibration, eliminating the need for setup and providing peace of mind on the road Built-in reverse-polarity and short-circuit protection add an extra layer of safety during towing Stay informed about your tow vehicle's voltage and trailer disconnect status through the convenient indicators.
The clean and user-friendly interface offers a full-text readout and troubleshooting capabilities, simplifying operation and maintenance The TriFlex NEXT brake controller offers exceptional control over 2-8 trailer brakes at a time (1-4 axles) Its adjustable settings effortlessly adapt to your unique vehicle-trailer configuration.
Compatible with low-volt, PWM, ABS, cruise control, and electric over hydraulic brakes, its slim profile combines functionality with a modern aesthetic Monitor your brake settings at a glance using the LED display that showcases power adjustments in 0.5 increments The display also provides full-text diagnostics for easy troubleshooting.
Adjust the brightness to ensure optimal visibility during day or night towing Fine-tune your towing experience with the TriFlex NEXT proportional brake controller It offers fully adjustable power and ramp time, allowing you to customize the settings according to your specific needs.
Choose from 10 gain settings and nine load settings to achieve precise control The LED screen clearly displays the ramp-up progress, and the brightness can be adjusted to match daytime or nighttime towing conditions With versatile mounting options, you can install the controller anywhere in your vehicle at any desired angle..
Features:
- Slim, low-profile design for a functional, modern aesthetic
- Unique bracket system for improved dash clearance
- Triple-axis, motion-sensing accelerometer for highly responsive, smooth stops
- Third axis provides dynamic power adjustments when going up or down a hill
- Operates 2-8 trailer brakes at a time (1-4 axles)
- 10 gain settings and 9 load settings to adapt to various driving conditions
- LED display shows power adjustments in 0.5 increments
- Clean, easy-to-read interface with full-text readout and troubleshooting
- Day-night mode and adjustable brightness for optimal visibility
- Auto-sleep mode prevents battery drain after five minutes of idle time
- Automatic leveling and calibration eliminate setup requirements
- Built-in reverse-polarity and short-circuit protection
- Tow vehicle 'low voltage' and trailer disconnect indicators
- Compatible with low-volt, PWM, ABS, cruise control and electric over hydraulic
- Mounts anywhere in the vehicle, at any angle
- Plug-and-play install with vehicle-specific quick plug harness (sold separately)
CURT 51362 Quick Plug Electric Trailer Brake Controller Wiring Harness (QTY 1)
Manufactured by: Curt
A CURT Quick Plug brake controller wiring adapter is one of the fastest and easiest ways to plug your brake controller into your vehicle It requires no cutting or splicing! Just insert the vehicle-specific plug end into the OEM vehicle’s factory brake controller socket The other end plugs into your CURT trailer brake controller.
Quick Plug harnesses are available for a variety of vehicles and are unique for each vehicle application to provide the easiest possible installation This particular brake controller harness fits certain years of the Toyota 4Runner, Land Cruiser, Sequoia, Tacoma, Tundra, Lexus GX460, GX470, LX470, LX570 and LX600 (see application info to verify fitment) CURT Quick Plug harnesses are compatible with most CURT brake controls and can be used as a replacement or for a new control unit installation.
They're also great for towing all types of trailers with electric brakes For versatile mounting of your trailer brake controller this Quick Plug wire harness measures two feet long It also features a slit loom sleeve to keep the wires protected against crushing and abrasions.
CURT Quick Plug wire plug-in adapters are made with 12-gauge wires for a reliable connection and braking, and come with zip ties to keep the harness contained and out of sight..
Features:
- Allows a CURT trailer brake controller to be plugged into OEM socket
- Quick plug harness installs with plug-and-play convenience
- Wire colors match standard brake controller harnesses
- Includes 24" of 12 gauge wire for flexible installation
- Slit-loom sleeve keeps wires contained and protected