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2025 - 2026 BMW X3
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Complete CURT Class 3 2" trailer hitch and 5-flat wiring kit (with 4-way to 5-way adapter for surge brakes) engineered for the 2025 - 2026 BMW X3. Vehicle-specific fit, plug-and-play installation, all hardware and instructions included.
This custom kit fits the following vehicles:
All Hardware and Installation Instructions Included!
Whatever your task at hand -- whether it's launching that boat before daybreak, setting up your camper before the rush or getting a final load to the dump before close -- CURT class 3 trailer hitches offer the strength needed for serious towing. They make it easy to hitch up and Bring It, offering a vehicle-specific fit and the weight capacity to handle a variety of trailers. Custom class 3 hitches are the most common type of receiver hitch for pickup trucks and SUVs. Because of their weight range, they are also found on full-size cars, crossovers and minivans. Each custom-fit class 3 hitch package is made for vehicle-specific mounting. This particular kit fits certain years of the BMW X3 and X4 (see application info to verify vehicle compatibility). It provides a weight carrying capacity of 5,000 lbs. GTW and 750 lbs. TW. CURT class 3 trailer hitches are typically used to attach and haul utility trailers, boat trailers, campers, snowmobile or ATV haulers and more (NOTE: Never exceed the lowest-rated towing component). Each class 3 hitch has a 2" receiver tube and is tested in accordance with SAE J684 for safety. To ensure that CURT class 3 receiver hitches have what it takes for serious trailering, they are designed using a hands-on approach and are constructed with rugged, high-strength steel and precise welding. We also protect our class 3 hitches in a co-cured finish of liquid A-coat and black powder coat for superior resistance to rust, chipping and UV damage.
CURT custom wiring connectors are the easiest way to outfit your vehicle with a CURT trailer wiring connection. They are built with some of the most advanced technology in the industry, and each one is custom-fitted to work with a specific make and model. Some automotive manufacturers install a special socket on the vehicle to be used for vehicle-to-trailer wiring. Although this special socket is not equipped on every vehicle, a CURT custom wiring connector -- also called a T-connector -- utilizes the socket for simple, stress-free installation. Rather than requiring you to cut, splice and solder into your vehicle's wiring system, the custom wiring connector uses a single OEM-compatible plug and instantly provides a standard, universal vehicle-to-trailer wiring connection, typically in the form a 4-way flat. All CURT custom wiring connectors are made vehicle-specific for the easiest possible installation and the best fit. This particular plug-in connector provides a 4-way flat socket and is designed to be a custom wiring option for certain years of the Ford Explorer, Ford Ranger, Mercury Mountaineer and Mazda B2500, B3000 and B4000 (factory tow package required; to verify your vehicle compatibility, see application info). It comes with all necessary hardware to establish a solid connection. It also comes with a dust cover to keep the connector socket clean when not in use. To ensure long-lasting reliability, all CURT custom wiring connectors are thoroughly tested for optimal functionality. Stress is the last thing you should feel when towing a trailer -- whether you're hauling your RV to that favorite camping destination, your ATVs up to the hunting grounds or your fishing boat to the new hidden hotspot. At CURT, we think your towing equipment should add to the enjoyment of your experience, not detract from it.
CURT offers a variety of high-quality trailer hitches and accessories for select vehicle models. Find the perfect fit for your towing needs at TowUniverse.
CURT, a Lippert brand, offers a complete line of towing products and is the leading manufacturer of custom-fit trailer hitches. We offer the broadest selection of custom-fit hitches, and each one is designed, welded, and coated in Wisconsin.
CURT is also a leader in flat towing products, as well as 5th wheel, gooseneck, and weight distribution hitches, ball mounts, electrical components, cargo solutions, and other towing accessories.
For everything from passenger cars and vans to full-size pickups and SUVs, CURT is 'The First Name in Towing Products®.'
Experts available to answer your questions
Call 888-634-9494Limited Lifetime (One-year finish, one-year parts)
1 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 2025 - 2026 | BMW X3 | — |
Yes, Curt part 55241 is designed for Ford Ranger. On the Ranger, the vehicle's factory tow harness connector is located on the driver's side behind the bumper.
Yes, Curt part 55241 is designed for Ford Explorer. On the Explorer, the vehicle's factory tow harness connector is located on the passenger's side behind the bumper.
Yes, Curt part 55241 is designed for Mazda B-Series Pickup.
Yes, Curt part 55241 is designed for Mercury Mountaineer.
On the Ford Ranger, the factory tow harness connector is located on the driver's side behind the bumper. It will have connection points similar to the harness connector you are installing.
On the Ford Explorer, the factory tow harness connector is located on the passenger's side behind the bumper. It will have connection points similar to the harness connector you are installing.
Remove the protective cap from the harness connector and insert it into your vehicle's factory tow harness connector located behind the bumper. Make sure the connectors are fully inserted with locking tabs in place.
Route the 4-flat connector to the center of the vehicle and secure it in a convenient out-of-the-way location. Secure any loose wires with the cable ties provided.
Before drilling, verify that miscellaneous items that may be hidden behind or under any surface are not present. This will avoid damage to hidden components and personal injury.
Curt 55241 fits Ford Explorer, Ford Ranger, Mazda B-Series Pickup, and Mercury Mountaineer.
The manual does not explicitly state whether drilling is required. It includes a warning to verify hidden items before drilling, suggesting drilling may be involved, but does not confirm this is a required step.
The manual does not specify what tools are required for installation.
The CURT 13578 trailer hitch has a gross trailer weight (GTW) capacity of 5,000 lbs and a tongue weight (TW) capacity of 750 lbs.
The installation manual does not specify which vehicles are compatible with part number 13578. Contact CURT product support at 877.287.8634 or visit curtmfg.com to confirm fitment for your specific vehicle make, model, and year.
Required tools include: ratchet, rotary cutting tool, 8mm socket, 10mm socket, 18mm socket, 13mm socket (for exhaust hanger), small punch, plastic rivet gun, tape measure, torque wrench, safety glasses, and pry tool. A tools reference guide is available at curtmfg.com/trailer-hitch-installation.
The kit includes one trailer hitch assembly and eight M6 black replacement rivets for reinstalling the wheel well trim.
Yes, the installation is rated as 'Difficult' based on the time and effort involved. The difficulty level may vary depending on installer expertise, vehicle condition, and availability of proper tools and equipment. The installation requires removal and reinstallation of the rear fascia, taillights, bumper beam, wheel well trim, and underbody panel, plus trimming of the underbody panel.
Yes, trimming of the underbody panel is required. The manual provides a reference image for trimming, but notes that all dimensions are approximate and you should confirm fit prior to trimming.
Safety glasses must be worn at all times while installing this product. Additionally, never exceed the vehicle manufacturer's recommended towing capacity when using the hitch.
Installation follows this sequence: (1) Remove underbody panel using 8mm socket; (2) Remove fasteners from rear fascia and wheel well trim using 8mm socket; (3) Remove rivets from wheel well trim using small punch and pry tool; (4) Remove fasteners from bumper cover using 8mm socket; (5) Remove plastic clips and unclip taillight covers using pry tool; (6) Remove interior trunk panel and taillight fastener using 10mm socket; (7) Remove taillight nuts and unplug electrical harness using 10mm socket; (8) Remove fastener under each taillight using 8mm socket; (9) Remove reflectors and fasteners using 8mm socket; (10) Remove rear fascia by releasing press-in tabs and unclipping electrical harness; (11) Remove bumper beam using 18mm socket and exhaust hanger using 13mm socket; (12) Install hitch and bumper beam onto vehicle studs using existing hardware and reattach exhaust hangers; (13) Torque fasteners; (14) Reinstall rear fascia and taillights in reverse order; (15) Trim underbody panel and reinstall.
The manual provides a reference image showing the trim area. All dimensions are approximate, so you must confirm fit prior to trimming. Use a rotary cutting tool to trim the underbody panel according to the reference image provided in Step 15. After trimming, reinstall the underbody panel as it was removed.
Torque all M12 hardware to 86 ft-lbs. Torque all M8 hardware to 23 ft-lbs. Use a torque wrench to ensure proper fastener tension and prevent damage to the product or vehicle.
To remove rivets: push the small center rod through the rivet with a small punch, then pry the rivet from the trim. When reinstalling the wheel well trim, use the supplied replacement M6 black rivets and a plastic rivet gun to fasten them.
Yes, the taillights must be removed during installation. Remove two nuts from each taillight using a 10mm socket, unplug the electrical harness, and gently remove each taillight. After installing the hitch, reinstall the taillights by reassembling components in reverse order.
The exhaust hanger attached to the bumper beam must be removed using a 13mm socket. The passenger-side hanger should be removed from the isolator and returned to the vehicle owner. After installing the hitch and bumper beam, reattach the exhaust hangers using existing vehicle hardware.
Periodic inspection of the trailer hitch should be performed to ensure all mounting hardware remains tight and structural components are secure. This helps prevent damage to the product or vehicle.
Never exceed the vehicle manufacturer's recommended towing capacity. While the CURT 13578 has a gross trailer weight capacity of 5,000 lbs and tongue weight capacity of 750 lbs, your vehicle's manufacturer may specify a lower limit. Always follow your vehicle manufacturer's towing recommendations.
The manual does not specify compatible vehicles. Contact CURT at 877.287.8634 or visit curtmfg.com to confirm fitment for your specific vehicle.
You will need: ratchet, rotary cutting tool, 8mm/10mm/18mm/13mm sockets, small punch, plastic rivet gun, tape measure, torque wrench, safety glasses, and pry tool.
No drilling is required. The installation uses existing vehicle hardware and fasteners. Trimming of the underbody panel is required using a rotary cutting tool.
Installation is rated as 'Difficult' and requires removal of the rear fascia, taillights, bumper beam, wheel well trim, and underbody panel, plus trimming. Difficulty may vary based on installer expertise and vehicle condition.
Torque M12 hardware to 86 ft-lbs and M8 hardware to 23 ft-lbs using a torque wrench.
Gross trailer weight capacity is 5,000 lbs; tongue weight capacity is 750 lbs. Never exceed your vehicle manufacturer's recommended towing capacity.
Wear safety glasses at all times during installation. Never exceed your vehicle manufacturer's recommended towing capacity when using the hitch.
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