Recommended Class III Hitch and Wiring for 2017 BMW X3

Question

Question:

Hi, I recently bought a boat and need to purchase a class three hitch and wiring for towing. My vehicle is a 2017 BMW X3 xdrive2.8l…can you recommend a hitch and wiring kit to accommodate a 7 way plug this was suggested by the dealer who I bought the boat from the trailer is a dual axel shorelander that will be towing an aluminum boat with a combined boat, motor trailer, fuel weight of 2900 pounds

asked by: Mike M

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Expert Reply:

For a complete setup to tow your ShoreLand'r boat trailer with your 2017 BMW X3 I recommend the following parts:

-etrailer Trailer Hitch Receiver # e78AR

-Curt Powered Tail Light Converter with 4-Pole Flat Trailer Connector # C59236

-Universal Installation Kit for Trailer Brake Controller # ETBC7

-etrailer Ball Mount Kit for 2" Hitches # 989900

The etrailer hitch # e78AR is a Class III hitch with a 2" receiver. It has a maximum gross trailer weight of 3,500 lbs which is more than enough for your application. It also features a matte black powder coat finish which gives it an OEM look. This has a concealed cross tube so only the receiver will be visible at the back of the vehicle. If you don't want to see the hitch when you aren't towing then I would get the EcoHitch Stealth # 306-X7275 instead.

For wiring, you will start by installing the # C59236 which will give you a 4-way. From there, you will upgrade to the 7-way using the # ETBC7. Since you need a 7-way it sounds like you also have brakes on your trailer. If that is the case, you will also need a brake controller like the # RED52VR. This brake controller mounts out of sight with only the knob visible in the cab of your vehicle. The knob controls the braking power and acts as the manual override.

Lastly you have the etrailer Ball Mount Kit # 989900. This kit has two ball mounts, one with a 3/4" rise or 2" drop and the other with a 2-3/4" rise or 4" drop. It also comes with a 1-7/8" and 2" ball, as well as a ball mount bag to store everything in.

I have attached some review and installation videos for your reference.

expert reply by: Robin H

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Answer 1

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

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Answer 2

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

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Answer 3

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 4

According to Blue Ox, it'll take an experienced installer about 4 to 5 hours to complete the installation of their #BX1128 Base Plate Kit on a 2016 Jeep Grand Cherokee. The install isn't what I'd call super-difficult, but the installation…

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Answer 5

The OEM prep package consists of 4 "pucks" in the bed of the truck that will allow you to drop in puck style hitches for easy installation and removal, that gives you a completely clear bed when not in use. The B&W Companion OEM 5th…

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Answer 6

Yes, it will work. You'll just need to cut the Lance 6-pin connector out and rewire it into the etrailer Trailer Wiring 7-Way Upgrade Kit w/ Junction Box and RV Style Connector item #e99011. Here are the individual functions of that Lance 6-pin:…

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Answer 7

You will have to go with a sliding hitch to allow the trailer to make tight turns. For a trailer 8 feet wide the only bed length that's going to allow 90 degree turns without a slider is a stationary hitch. That being said you have two options.…

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Answer 8

Hey Ricardo! Yes, the Curt Trailer Hitch Receiver #C82RJ is the hitch Curt is working on for the new 2027 Telluride. This is a pre-order since Curt hasn't finished the design. It does not include wiring. The wiring harness for the 2027 is also up…

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Answer 9

Hi David! There are quite a few hitches offered for your 2026 Honda Odyssey, so I definitely understand wanting to know the differences. There are basically three styles available for you and I have them broken out below: Exposed Crosstube: etrailer…

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Answer 10

Since wire color codes are NOT universal, we always recommend wiring by function, rather than wire color. If you look at the Trailer Wiring FAQ article I have linked you to, you can see some diagrams showing the proper way to wire a vehicle and…

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Answer 11

The main difference between the Curt Trailer Hitch Receiver part #C13416 and the EcoHitch Hidden Trailer Hitch Receiver part #EH97FR is that the EcoHitch has a completely hidden cross tube whereas the Curt cross tube will be visible from the rear of…

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Recommended Class III Hitch and Wiring for 2017 BMW X3

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