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2004 Subaru Impreza Wagon
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Always the correct part
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Complete CURT Class 1 1-1/4" trailer hitch and 4-flat custom wiring kit engineered for the 2004 Subaru Impreza Wagon. 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!
However you define adventure -- whether it's climbing onto the back of a mountain bike, hunting from the top of a tree stand or camping with the family a long way from nowhere -- CURT class 1 hitches provide a light-duty towing receiver to help you Bring It. Each is made to fit a specific vehicle, providing easier installation, a better fit and optimal towing capacity. Custom class 1 trailer hitches are available for a variety of smaller vehicle types, including the compact car, crossover, minivan and small SUV. This particular class 1 hitch is designed to be a custom hitch for certain years of the Subaru Impreza and Saab 9-2X (to verify vehicle compatibility, see the CURT application guide at curtmfg.com). Tested in accordance with SAE J684, it offers a weight carrying capacity of 2,000 lbs. GTW and 200 lbs. TW. It is equipped with 1-1/4" receiver tube opening to accept a ball mount shank or other hitch mount. This class 1 hitch also comes with all necessary mounting hardware. With its lightweight design and smaller receiver tube size, a class 1 hitch is especially useful for adding cargo space with a hitch-mounted bike rack or cargo carrier. They can also typically be used to tow small trailers such as a utility trailer, kayak trailer or teardrop camper (never exceed the lowest weight capacity of any towing component; i.e. the vehicle, hitch, trailer, etc). Though CURT class 1 trailer hitches are only intended for light-duty towing, we apply the same principles of quality as we do to the rest of our rear mount hitches. Each class 1 hitch is made with hands-on engineering, high-strength steel and precise welding. We use a co-cured finish of liquid A-coat, inside and out, and durable black powder coat to provide a lasting defense against rust, chips and UV rays.
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 Subaru Forester, Legacy, Outback wagon, Tribeca, B9 Tribeca and Impreza WRX wagon (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 888-634-94941 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 2004 | Subaru Impreza Wagon | — |
Curt 11318 is designed for ('93-'07) Subaru Impreza, ('02-'07) WRX, ('05-'07) Outback Sport, and ('05-'06) SAAB 9-2X. Verify your vehicle year and model against this list before purchasing.
No. The installation notes explicitly state 'NO DRILLING REQUIRED'. The hitch uses existing weld nuts on the frame rails.
Yes. You must trim the rear bumper fascia on the driver side to provide clearance for the driver side mounting plate. The trim area is approximately 1/2" x 1/2".
The kit includes: one 7/16-14 UNC Grade 8 hex head cap screw (part 10-10497), one 7/16-14 UNC Grade 8 serrated flange nut (part 20-00103), and three 7/16 flat washers (part 30-00166). These are used to secure the rubber exhaust isolator to the hitch side plate.
Torque M12 hardware to 82 lb.-ft. and 7/16 hardware to 70 lb.-ft. These values apply to the frame rail fasteners and the exhaust isolator fasteners respectively.
Remove tie-down brackets from the bottom of both frame rails and the rear exhaust hanger on the driver side. Lower the exhaust to provide access. These preparatory steps must be completed before mounting the hitch.
The manual does not specify the gross load capacity or tongue weight for this hitch. You must not exceed your vehicle manufacturer's recommended towing capacity. Contact Curt Manufacturing or consult your vehicle documentation for the specific capacity ratings.
Curt Manufacturing warrants this product to be free of defects in material and workmanship at the time of retail purchase by the original purchaser. If the product is found to be defective, Curt may repair or replace it at their option when returned prepaid with proof of purchase. Warranty is voided by alteration, misuse, or improper installation.
Remove the tie-down brackets from the bottom of both frame rails and the rear exhaust hanger on the driver side. Additionally, remove the metal exhaust hanger bracket from its rubber isolator; the isolator will be reused and fastened directly to the hitch side plate. Return the tubular spacer from the isolator to the customer.
Remove the metal exhaust hanger bracket from the rubber isolator. The rubber isolator is then fastened directly to the hitch side plate using the fasteners provided in the kit (one 7/16-14 UNC hex head cap screw, one serrated flange nut, and three flat washers). The tubular spacer should be returned to the customer.
The existing fasteners on the frame rails are reused to mount the hitch. The installation diagram shows 'RE-INSTALL EXISTING FASTENERS' on the passenger side frame rail. These existing weld nuts secure the hitch to the frame.
Trim the rear bumper fascia on the driver side as needed to provide clearance for the driver side mounting plate. The trim area is approximately 1/2" x 1/2". The exact amount may vary depending on the specific vehicle condition and bumper fit.
The exhaust must be lowered to provide access to the rear exhaust hanger on the driver side, which must be removed as part of the installation process. Lowering the exhaust creates the necessary working space to complete the hitch installation.
Periodically check the receiver hitch to ensure that all fasteners are tight and that all structural components are sound. Regular inspection helps maintain safe operation and prevents loosening of critical fasteners due to vibration and use.
M12 hardware (frame rail fasteners) is torqued to 82 lb.-ft., while 7/16 hardware (exhaust isolator fasteners) is torqued to 70 lb.-ft. The different torque values reflect the different sizes and applications of these fasteners.
You must not exceed your vehicle manufacturer's recommended towing capacity, even though Curt 11318 may have its own capacity rating. The vehicle's limit is the controlling factor. Consult your vehicle's owner manual or manufacturer documentation to determine the maximum towing weight your vehicle can safely handle.
Yes, the 55370 is compatible with Subaru Outback wagons, except for the Sport model. The connector is located behind the passenger side rear access panel (S4 location). The 4-flat connector must be inserted through the existing hole in the panel.
Yes, the 55370 is compatible with Subaru Forester models. The vehicle wiring connector is located in the spare tire area on the passenger side under the threshold or near the passenger side interior trim panel. You will need to remove the fasteners securing the trim panel to access it.
Yes, the 55370 is compatible with Subaru Impreza WRX wagon models. Refer to the wiring location guide in the manual for the specific access location on your vehicle.
No, the 55370 is not compatible with Subaru Outback Sport models. It is designed for Outback wagons excluding the Sport variant.
The signal circuits are rated for 3.0 amps per side. The tail and running circuits are rated for 6.0 amps total. Do not exceed these ratings or the tow vehicle lamp load rating, whichever is lower, as this can cause loss of warranty, overheating and potential fire.
The battery connection must be fuse-protected with a 10-amp maximum fuse. Exceeding this rating can cause loss of warranty, overheating and potential fire.
You only need a Phillips screwdriver. Depending on your vehicle model, you may also need a pry tool to remove plastic panels during access to the wiring harness.
The kit includes the custom wiring connector, a 10-amp inline fuse holder with fuse, cable ties for securing loose wires, and a 4-flat dust cover to help prevent corrosion.
The manual does not specify whether the battery must be disconnected before installation. Contact the manufacturer or consult your vehicle owner's manual for guidance on safe electrical work.
On the Tribeca, the wiring connector is located under the rear trim panel. To access it, remove the cargo nets and roll back the carpet in the rear cargo area, then remove the four plastic fasteners securing the jack compartment.
On the Outback, the wiring connector is located behind the passenger side rear access panel (S4 location). To access it, remove the cargo nets and carpet from the center and left cargo area, then remove the black plastic from that area using a pry tool.
Once you have located the vehicle wiring connector, remove the tape covering the plug. Insert the custom wiring connector end into the vehicle connector. Make sure the connectors are fully inserted with locking tabs in place. For Outback models, insert the 4-flat through the existing hole in the panel.
When in use, route the 4-flat to the center of the vehicle and out of the trunk. When not in use, roll up and store in a convenient, out-of-the-way location inside the trunk. Secure any loose wires with the provided cable ties.
Insert the provided 10-amp fuse into the inline fuse holder. This fuse protects the battery connection and must not be exceeded.
Yes, install the provided 4-flat dust cover to help prevent corrosion. This should be done during the final reinstallation step after all other components have been secured.
All steps must be followed to ensure the wiring connector will function properly. Once installed, test for proper function by using a test light or connecting a properly wired trailer. The manual does not provide detailed testing procedures beyond this.
Yes, it fits Outback wagons (excluding Sport models). The connector is behind the passenger side rear access panel.
The battery connection must use a 10-amp maximum fuse. Exceeding this can cause overheating, fire and loss of warranty.
Make sure the connectors are fully inserted with locking tabs in place. The manual recommends testing for proper function using a test light or properly wired trailer after installation.
A 10-amp fuse is provided. Insert it into the inline fuse holder as part of the installation.
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