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Install the 7 pin trailer lights for BMW X3 E83

BMW X3 trailer hitch

The family and I recently purchased a 1999 Coleman pop up tent trailer, and I’ve been itching to do some trailering ever since. The BMW X3 can easily pull the trailer, I had no problem doing 65 MPH+ up the Altamont pass on the first trip out, but you definitely feel the extra weight when braking. Even though the trailer weighs less than 2,000 lbs., it comes with electric brakes that engage automatically when you depress the brake pedal in the car. To make those or any electric trailer brakes work, you need a brake controller as well as the 7 pin trailer harness connector. I had already installed the hitch and the 4 pin connector, now I needed to get the full 7 pin trailer lights for my BMW X3 and brake controller if I wanted the proper trailer solution.

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