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2016 - 2020 Kia Optima
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| Finish | GLOSS BLACK POWDER COAT |
| Main Body Shape | Round |
| Material | Carbon Steel |
| Mount Type Description | Blank |
| Receiver Tube Size | 1-1/4 IN |
| Side Application Type Description | Blank |
| Tongue Weight (TW) | 200 LB |
| Warranty | Limited Lifetime Warranty (One-Year Finish, One-Year Parts) |
| Weight Carrying Capacity (WC) | 2,000 LB |
| Battery-Powered | Yes |
| Converter Type | Circuit Protected |
| Electrical System Type | 3W |
| Finish | N/A |
| Material | Blank |
| Mount Type Description | Blank |
| Output Type | 4-Way Flat |
| Side Application Type Description | Blank |
| T-Connector Location | P3,P4 |
| Tail Light Circuits | 6.0 Amps |
| Turn and Brake Circuits | 3.0 Amps |
| Warranty | One-Year Limited Warranty |
| Side Application Type Description | Blank |
| Tongue Weight (TW) | 350 LB |
| Warranty | Limited Lifetime Warranty (One-Year Finish, One-Year Parts) |
| Drop | 3-1/4 IN |
| Finish | GLOSS BLACK POWDER COAT |
| Gross Trailer Weight (GTW) | 3,500 LB |
| Material | Blank |
| Mount Type Description | Blank |
Notes:
Notes:
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 |
|---|---|---|
| 2016 - 2020 | Kia Optima | — |
The 16-20 KIA Optima 1.25 CURT Trailer Hitch + Assure Proportional Brake Controller Kit HBCW1601 (Part #HBCW1601) fits the following vehicles: 2016-2020 Kia Optima. Always verify your specific year, make, and model before ordering.
The 16-20 KIA Optima 1.25 CURT Trailer Hitch + Assure Proportional Brake Controller Kit HBCW1601 (Part #HBCW1601) fits 2016-2020 Kia Optima models. The 2020 model year is the last year covered by this part number. For newer models, check for an updated version.
Yes, the 16-20 KIA Optima 1.25 CURT Trailer Hitch + Assure Proportional Brake Controller Kit HBCW1601 (Part #HBCW1601) is designed to fit the 2016-2020 Kia Optima.
The 16-20 KIA Optima 1.25 CURT Trailer Hitch + Assure Proportional Brake Controller Kit HBCW1601 (Part #HBCW1601) Refer to the included instructions for installation details. Basic hand tools are typically all you need.
Yes, CURT part number 11025 is designed for 2011–2014 Hyundai Sonata sedans, including the Blue Drive model. It is not compatible with other body styles or model years outside this range.
Yes, CURT part number 11025 is designed for 2011–2015 Kia Optima sedans. It is not compatible with other body styles or model years outside this range.
The CURT 11025 is rated for a minimum of 2,000 lbs trailer weight and 200 lbs tongue weight as a weight-carrying hitch. However, you must never exceed your vehicle manufacturer's recommended towing capacity, which may be lower. Always verify your vehicle's limits before towing.
Non-trailer loads applied to this hitch must be supported by CURT stabilizing straps, part number 18050. Failure to properly support non-trailer loads will void the product warranty. Consult the CURT catalog or website for details on the 18050 straps.
You will need: ratchet, 10 mm socket, 3/4 inch socket, torque wrench, pry bar, safety glasses, spray lubricant, and a die grinder (for trimming the underbody panel if present). A spray lubricant is recommended to ease installation.
The kit includes: 4× 1/2-13 UNC grade 8 bolts (1-1/4 inch long, part 10-10278), 4× 0.250 × 1.00 × 3.00 inch square hole spacers (part CM-SP6), 4× 1/2-13 UNC grade 8 serrated flange nuts (part 20-00062), and 2× 1/2 inch × 30 inch fishwire (part 1_2 x 30 FISHWIRE).
The manual does not specify whether battery disconnection is required. Contact CURT technical support at 877-287-8634 for clarification before beginning installation.
Two people may be required to ease installation. If you are hesitant to undertake this task on your own, contact an authorized CURT installer for additional assistance.
The installation is rated as Easy to Moderate. The manual recommends reading all instructions thoroughly before beginning and using proper tools to improve quality and reduce installation time.
Yes. Step 1 requires you to remove the rubber exhaust hangers and lower the exhaust. Be sure to support the exhaust to prevent damage. After the hitch is installed and torqued, you will raise the exhaust back into position in step 7.
Yes. Step 2 requires removal of the heat shield(s) by removing 4 fasteners. After torquing the hitch hardware in step 7, you will reinstall the heat shield(s), leaving the rear-most fastener off. You may have to slot the front hole in the heat shield to allow clearance.
If your vehicle has a plastic underbody panel, step 2 requires its removal by removing 6 fasteners. After the hitch is installed and torqued, you will trim and reinstall the panel in step 7 according to the trim diagram on page 2 or 4.
The frame rail pads are protective covers over the mounting holes on each frame rail. Step 3 requires you to remove 2 pads from each frame rail and discard them. These holes will be used to mount the hitch.
You may need to enlarge the forward-most hole on both sides of the frame to allow 1/2 inch bolts and spacers to pass through. This is only necessary if there is no fishwire access between the bumper and the rear-most part of the frame. Check for access in step 4 before deciding whether enlargement is needed.
If your vehicle has a plastic underbody panel, you will need to trim it after the hitch is installed. The trim diagram on page 2 or 4 shows approximate trim dimensions: 4 inches on each side (items 401 and 403), 7 inches at the bottom, and 1/4 inch and 1 4/8 inch at specific locations. Trim dimensions are approximate; check fit prior to completing the trim. A die grinder is recommended for this work.
All 1/2 inch hardware must be torqued to 110 ft-lbs. This is done in step 7 after the hitch is raised into position and attached to the frame using the 1/2 inch flange nuts.
The hitch uses 1/2-13 UNC grade 8 bolts, 1-1/4 inches long (part 10-10278). Four bolts are included in the kit.
The kit includes 4 square hole spacers, each 0.250 × 1.00 × 3.00 inches (part CM-SP6). These spacers are fishwired and bolted into position on the driver and passenger sides of the vehicle frame in step 4.
The kit includes 4 serrated flange nuts, 1/2-13 UNC grade 8 (part 20-00062). These nuts are used to attach the hitch to the frame in step 6 and are torqued to 110 ft-lbs in step 7.
Fishwire is a flexible wire tool used to route bolts and spacers through tight spaces. The kit includes 2 pieces of 1/2 inch × 30 inch fishwire (part 1_2 x 30 FISHWIRE). In step 4, you fishwire the 1/2 inch bolts and spacers into position on the driver and passenger sides of the vehicle frame. The manual references a fishwire technique diagram for detailed guidance.
After installation, periodically check the receiver hitch to ensure all fasteners are tight and all structural components are sound. This ongoing maintenance is important for safe towing.
The CURT 11025 is designed for use with ballmount #D-55001 or #45501. Euro mount options are available: #45571 (1-7/8 inch ball) and #45572 (2 inch ball).
Yes, the CURT 11025 fits 2011–2014 Hyundai Sonata sedans (including Blue Drive) and 2011–2015 Kia Optima sedans.
The CURT 11025 is rated for 2,000 lbs trailer weight and 200 lbs tongue weight minimum. Never exceed your vehicle manufacturer's recommended towing capacity.
Yes. You must remove and lower the exhaust (supporting it to prevent damage) and remove the heat shield(s) by removing 4 fasteners. Both are reinstalled after the hitch is torqued.
You may need to enlarge the forward-most hole on both frame rails to allow 1/2 inch bolts and spacers to pass through, but only if fishwire access is not available. Check access in step 4 before deciding.
All 1/2 inch hardware must be torqued to 110 ft-lbs after the hitch is raised into position and attached to the frame.
Non-trailer loads must be supported by CURT stabilizing straps, part number 18050. Failure to properly support non-trailer loads voids the warranty.
Periodically check the receiver hitch to ensure all fasteners are tight and all structural components are sound.
The kit includes: one 30 amp auto-resetting circuit breaker, two #10 ring terminals, two 3/8" ring terminals, two 1/2" ring terminals, three 12-10 gauge butt connectors, 10 feet of 10 ga black/white duplex wire, 20 feet of 10 ga blue cross-linked wire, and eight 8.5" cable ties.
Yes, but with a critical difference: these vehicles require the stop signal wire to be spliced to the light green wire on the turn signal harness connector under the dash, not to the brake pedal switch. Do NOT connect to the red wire with green stripe, as serious damage may occur. All other vehicles connect to the brake pedal switch instead.
You will need: a test light, wire stripper/cutter, crimp tool, and 3/8" box end wrench. The test light is used to identify the cold (switched) side of the brake pedal switch.
Yes. The manual cautions to disconnect the tow vehicle's negative battery cable before installation. Reconnect it only in the final step after all wiring is complete.
Mount the 30 amp circuit breaker near the tow vehicle's positive battery terminal. This keeps the power wire run as short as possible and protects the circuit.
Use 10 gauge (10 ga) black wire from the duplex wire included in the kit. Strip 3/8" of insulation from each end. Crimp a #10 ring terminal to the end that attaches to the circuit breaker stud labeled 'BAT', and a 3/8" or 1/2" ring terminal (sized to fit your battery terminal) to the end that attaches to the positive battery terminal.
Feed the 10 ga duplex wire from the brake controller in the cockpit through the firewall into the engine compartment toward the battery. Cut to length as needed. At the battery end, crimp a 3/8" or 1/2" ring terminal to the white wire and a #10 ring terminal to the black wire. Attach the black wire to the circuit breaker stud labeled 'AUX' and tighten the nut with a 3/8" box end wrench.
When passing the duplex wire through the firewall into the engine compartment, use an existing grommet, add a new grommet, or fill the hole with silicone rubber to insulate and protect the wire. The same protection applies when passing the blue cross-linked wire through any sheet metal at the rear of the vehicle.
In the cockpit, attach the black duplex wire to the brake controller's battery wire (typically black) and the white duplex wire to the brake controller's ground wire (typically white). Use either one of the supplied yellow butt connectors or solder the leads together and insulate with heat shrink tubing.
Locate the brake pedal switch on the back side of the vehicle's brake pedal. Use a test light or volt meter to identify the 'cold' or switched side—this terminal will only show power when the brake pedal is depressed. Attach the stop signal wire (typically red) from the brake controller to the cold side of the switch using a wire tap.
Locate the semi-circle turn signal harness connector on the steering column under the dash. It has two rows of wires: a row of four and a row of seven. Attach the stop signal wire (typically red) from the brake controller to the light green wire using a wire tap. Do NOT connect to the red wire with green stripe, as serious damage may occur.
Feed the 10 ga blue cross-linked wire from the brake controller to the trailer connector at the rear of the vehicle, taking up any slack in the wire. When passing through any sheet metal, use an existing grommet, add a new grommet, or fill the hole with silicone rubber to protect the wire.
Attach the blue cross-linked wire to the brake controller's electric brake wire (typically blue) using one of the supplied yellow butt connectors or by soldering and insulating with heat shrink tubing. At the rear of the vehicle, trim any loose blue wire and attach it to the trailer connector's electric brake terminal. Refer to the trailer connector's wiring diagram for the correct terminal location.
Secure any loose wires with the cable ties provided. Connect the black power wire from the circuit breaker to the positive side of the battery. Connect the white ground wire from the brake controller to the negative side of the battery. Finally, reconnect the tow vehicle's negative battery cable to the battery.
The circuit breaker is 30 amps and auto-resetting. It must be mounted near the positive battery terminal and connected directly to the positive battery terminal via the included black 10 gauge wire.
Use a 3/8" box end wrench to tighten the nuts on the circuit breaker studs labeled 'BAT' and 'AUX'.
The kit includes 10 feet of 10 gauge black/white duplex wire for the battery and brake controller connections, and 20 feet of 10 gauge blue cross-linked wire for the electric brake signal to the trailer connector.
Black wire connects to the positive battery and circuit breaker. White wire connects to the brake controller ground and negative battery. Red wire is the stop signal wire from the brake controller. Blue wire is the electric brake signal wire. The manual notes these are 'typically' these colours but recommends confirming with your brake controller documentation.
Yes. You can solder the leads together and insulate with heat shrink tubing as an alternative to using the supplied yellow butt connectors. This applies to connections between the duplex wire and the brake controller wires, and between the blue cross-linked wire and the brake controller.
The black power wire must connect directly to the positive battery terminal via the 30 amp circuit breaker. Connecting to the fuse panel or any other accessory wiring may damage vehicle wiring and cause trailer brake failure. The circuit breaker protects the circuit and must be the only protection between the battery and the brake control system.
Do NOT connect the stop signal wire to the red wire with green stripe on the turn signal harness. Serious damage may occur. Connect only to the light green wire. Also, do not connect to the brake pedal switch on these vehicles; use the turn signal harness instead.
The kit is universal but requires an existing trailer connector and brake controller. 1989-1991 Ford E & F-Series with ABS use a different stop signal connection (turn signal harness instead of brake pedal switch). Consult your brake controller documentation for compatibility.
No drilling is required. The kit connects to existing components: the battery, brake controller, brake pedal switch (or turn signal harness on 1989-1991 Ford E & F-Series with ABS), and trailer connector.
Do NOT connect the stop signal wire to the red wire with green stripe on the turn signal harness—serious damage may occur. Connect to the light green wire instead, and do not use the brake pedal switch.
Connecting to the fuse panel or accessory wiring may damage vehicle wiring and cause trailer brake failure. The 30 amp circuit breaker must be the only protection between the battery and the brake control system.
Yes, the Curt 56314 custom wiring harness is designed for Kia Optima and Kia Optima Hybrid models. The harness connects to the vehicle's taillight wiring connectors located behind the driver and passenger side taillight housings inside the trunk.
Yes, the Curt 56314 custom wiring harness is compatible with both Kia Optima and Kia Optima Hybrid models.
The Curt 56314 has two circuit ratings: Signal Circuits are rated at 3.0 amps per side, and Tail/Running Circuits are rated at 6.0 amps total. The battery connection must be fuse-protected with a maximum 10-amp fuse. Do not exceed the product rating or your tow vehicle's lamp load rating, whichever is lower.
You will need: Phillips screwdriver, flat blade screwdriver, panel trim removal tool, wire stripper, wire crimper, and cutting tool. A 3/32" drill bit is also needed if you must drill a pilot hole for the ground wire screw.
Yes, you must disconnect the negative battery terminal before beginning installation. This is a required safety step performed in Step 1 of the installation process.
After removing the trunk floor coverings and rear scuff panel, pull back the felt liner to locate the vehicle's taillight wiring harness connectors. Separate the connectors from the taillight housing carefully, taking care not to damage the locking tabs. Insert the custom wiring harness end with the yellow wire between the separated connectors on the driver side, ensuring the connectors are fully inserted with locking tabs in place. Repeat this process on the passenger side using the harness end with the green wire.
Locate a suitable grounding point near the taillight connector, such as an existing screw with nut in the vehicle frame. The area must be free of rust, dirt and paint. If no suitable existing screw is available, drill a 3/32" pilot hole and use the provided screw. Secure the white ground wire using the ring terminal and provided screw. Before drilling, check for hidden items behind or under any surface to avoid damage and personal injury.
Locate a flat spot inside the vehicle near the taillight and adhere the black converter box using the provided double-sided tape. The converter box should be positioned in a location that is accessible but out of the way.
Route the black power wire from the vehicle battery as shown on the included CME-PCL-INS sheet. This separate instruction sheet provides the specific routing path for your vehicle. The battery connection must be fuse-protected with a maximum 10-amp fuse.
When not in use, roll up the 4-flat connector and store it in a convenient, out-of-the-way location. When in use, route the 4-flat to the center of the vehicle. Secure any loose wires with the provided cable ties to prevent tangling and damage.
Reinstall all items removed during installation, including trunk floor coverings, felt liner, and rear scuff panel. Reconnect the negative battery terminal. Install the provided 4-flat dust cover to help prevent corrosion. Test the wiring harness for proper function using a test light or by connecting a properly wired trailer.
The battery connection must be fuse-protected with a maximum 10-amp fuse. Exceeding this rating can cause loss of warranty, overheating and potential fire. Do not exceed the product rating or your tow vehicle's lamp load rating, whichever is lower.
Exceeding the product rating can cause loss of warranty, overheating and potential fire. Do not exceed the product rating or your tow vehicle's lamp load rating, whichever is lower. The Signal Circuits are rated at 3.0 amps per side and Tail/Running Circuits at 6.0 amps total.
Test the wiring harness for proper function by using a test light or connecting a properly wired trailer. All steps must be followed to ensure the wiring harness functions properly before testing.
Yes, the Curt 56314 custom wiring harness is designed for both Kia Optima and Kia Optima Hybrid models.
Phillips screwdriver, flat blade screwdriver, panel trim removal tool, wire stripper, wire crimper, cutting tool, and a 3/32" drill bit (if drilling is required for the ground wire).
Yes, disconnect the negative battery terminal before beginning installation.
Drilling may be required if no suitable existing screw with nut is available for the ground wire. If drilling is needed, drill a 3/32" pilot hole in a rust-free, clean area of the vehicle frame.
The battery connection must be fuse-protected with a maximum 10-amp fuse. Exceeding this rating can cause loss of warranty, overheating and potential fire.
The 4-way flat electrical adapter converts a vehicle's 4-way flat trailer connector to other trailer connector types (6-way round, 7-way RV blade, or dual 4-way flat). This allows you to tow trailers with different connector styles. Single-output models (57184, 57183, 57185, 57626, 57676) convert to one connector type; dual-output models (57604, 57624, 57672, 57674, 57102) provide two different connector outputs simultaneously.
Yes. Your vehicle must be equipped with a 4-way flat trailer connector. If your vehicle does not have one, you will need to install a custom wiring harness or other 4-way flat trailer connector before installing this adapter.
Both convert a 4-way flat connector to a 7-way RV blade. The difference is that 57185 includes a mounting bracket, while 57184 does not.
Both convert a 4-way flat connector to a 6-way round. The difference is that 57626 includes a mounting bracket, while 57183 does not.
Curt offers three dual-output models that provide both a 4-way flat and a 7-way RV blade output: part numbers 57672, 57674, and 57102. All three include a mounting bracket.
Curt offers two dual-output models that provide both a 4-way flat and a 6-way round output: part numbers 57604 and 57624. Both include a mounting bracket.
You will need: a 1/8" drill bit, drill, Phillips screwdriver, wire stripper, cutting tool, terminal crimpers, and a test light. The manual also lists three self-tapping screws (#10 - 1/2") as required, though these are not included with the product.
No. The three self-tapping screws (#10 - 1/2") used to attach the mounting bracket are not included and must be purchased separately.
Mount the combination harness in a location on the tow vehicle that is within reach of the trailer's wiring harness and near the center of the vehicle. The mounting bracket (if included) should be attached to the vehicle's bumper or other suitable surface.
Yes. You must drill two 1/8" holes: one for the grounding point and one (or more) for the mounting bracket. Before drilling, you must check for brake lines, fuel lines, wiring and other components that may be hidden behind or under the surface to avoid damage.
No. You must never attach the mounting bracket directly to the hitch by cutting, welding or drilling into the hitch. Mount it to the vehicle's bumper or other suitable surface instead.
The adapter uses four wires: Yellow (auxiliary or back-up lights), Blue (electric brakes), Black (positive power with appropriate inline fuse), and White (ground). All wires except black and white must be connected using 12 gauge (minimum) wire and butt connectors to the appropriate vehicle functions.
The white wire is the ground connection. It must be attached with a ring terminal to a 1/8" hole drilled in a suitable grounding point on the vehicle using a #10 - 1/2" self-tapping screw. This ground connection is required for the harness to work properly. The white wire on the vehicle's 4-way flat connector does not support the ground (-) functions of the combination harness.
Yes. The black wire (positive power) must be connected with an appropriate inline fuse. The manual does not specify the fuse amperage rating.
Use 12 gauge (minimum) wire for all connections. The manual specifies this minimum gauge for the remaining wires (yellow, blue, and black) when connecting to appropriate vehicle functions.
Failing to properly ground the product can cause loss of warranty, overheating and potential fire. The white wire must be securely attached to a clean grounding point using a #10 - 1/2" self-tapping screw in a 1/8" hole. The area must be clean of dirt, debris or undercoating.
Before drilling, you must check for brake lines, fuel lines, wiring and any other components that may be hidden behind or under the surface. Drilling into these components can cause damage and personal injury.
Do not exceed the product rating or the tow vehicle lamp load rating, whichever is lower. Exceeding either rating can cause damage or unsafe operation.
Confirm proper function with a test light or by using a properly functioning trailer. This verifies that all connections are working correctly before towing.
Secure any loose wires using cable ties or equivalent product to prevent them from moving, catching on components, or becoming damaged.
Your vehicle must have a 4-way flat trailer connector. If it does not, you will need to install a custom wiring harness or other 4-way flat connector first. Check the part number table to confirm the adapter converts to the connector type you need.
You must purchase three #10 - 1/2" self-tapping screws for the mounting bracket. You will also need an appropriate inline fuse for the black (positive power) wire; the manual does not specify the amperage.
Yes, you must drill two 1/8" holes: one for grounding and one for the mounting bracket. Before drilling, check for brake lines, fuel lines and wiring behind the surface. Never drill into the hitch.
Yellow = auxiliary/back-up lights; Blue = electric brakes; Black = positive power (needs inline fuse); White = ground (must be properly grounded or warranty is void and fire risk exists). Use 12 gauge minimum wire and butt connectors.
Proper grounding of the white wire is critical. Failing to ground it properly can cause loss of warranty, overheating and fire. The grounding point must be clean of dirt, debris and undercoating.
Test with a test light or by using a properly functioning trailer to confirm all connections work. Secure loose wires with cable ties.
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