Trailer Brake Controller And Wire Harness For 2003 BMW X5

Published 09/17/2021

Products Featured in This Question

Draw-Tite Max-Frame Trailer Hitch Receiver - Custom Fit - Class IV - 2"

(45)

$259.35

ZCI Circuit Protected Vehicle Wiring Harness w/ 4-Pole Flat Trailer Connector and Installation Kit

(521)

$192.62

Curt Echo Wireless Brake Controller - 7-Way Plug-in w/ Bluetooth App - Up to 2 Axles - Proportional

(1769)

$279.95

Adapter 4 Pole to 7 Pole and 4 Pole w/Test Lamps

(312)

$41.73

Curt 4-Way Flat Trailer Connector w/ 60" Harness and Mounting Bracket

(61)

$12.65

Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires

(3397)

$121.25

7-Way RV Upgrade Kit for Trailer Brake Controller Installation - 12 Gauge Wires

(337)

$96.74

Redarc Tow-Pro Elite Brake Controller - Dash Knob - Off-Road Mode - Up to 3 Axles - Proportional

(1676)

$290.00

Question:

Which trailer brake do I need for a 2003 bmw x5

asked by: Herb G

Expert Reply:

I recommend the Curt Echo Wireless Trailer Brake Controller # C51180 it is set up as fast as you can plug it into your vehicle and trailer ends. Then you control it via Bluetooth from an app on your mobile device.

The Redarc Tow-Pro Elite Trailer Brake Controller - 1 to 3 Axles - Proportional # RED44FR is a great choice for a brake controller if you want actual hardware and a knob to use instead of your mobile device.

Your 2003 BMW X5 has many options for trailer brake controllers and trailer wiring harnesses.
The easiest way to go from a 4-way to a 7-way is to use our 7-Way RV Upgrade Kit for Trailer Brake Controller Installation # ETBC7L. If you do not have wiring at all I would use the ZCI Circuit Protected Vehicle Wiring Harness w/ 4-Pole Flat Trailer Connector and Installation Kit # 119250KIT. Then upgrade it with the # ETBC7L.

If you decide to use the Redarc Tow-Pro Elite you will use the Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat # ETBC7 instead of the # ETBC7L because the kit comes with wiring and accessories that are required for installation of the trailer brake controller. The # ETBC7L lets you use a brake controller that uses power from your trailer connector instead of wiring into your vehicle.