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2007 - 2018 Buick X5
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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 2007 - 2018 BMW X5. Vehicle-specific hitch fit, with a universal taillight converter for trailer wiring; 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 X5 and X6 (see application info to verify vehicle compatibility). It provides a weight carrying capacity of 6,000 lbs. GTW and 600 lbs. TW. It is also compatible with a weight distribution hitch for level towing and a rating of 6,000 lbs. WD and 600 lbs. WDTW. 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.
This CURT universal taillight converter is the go-to solution when a vehicle-specific custom harness isn't available for your make and model. It provides a standard 4-way flat trailer connector for tail lights, brake lights and turn signals, and is compatible with most vehicles (light splicing required). Built with surface-mount circuitry and a potted enclosure for durability against moisture, vibration and road debris. Includes a dust cover and is backed by a limited one-year warranty.
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 |
|---|---|---|
| 2007 - 2018 | Buick X5 | — |
The 07 - 18 Buick X5 Curt 2" Class 3 Trailer Tow Hitch + 5-Flat Wiring Kit Tow Boat/Utility Trailer with Surge Brakes 13077 (Part #5W-CHW-176) fits the following vehicles: 2007-2018 Buick X5. Always verify your specific year, make, and model before ordering.
The 07 - 18 Buick X5 Curt 2" Class 3 Trailer Tow Hitch + 5-Flat Wiring Kit Tow Boat/Utility Trailer with Surge Brakes 13077 (Part #5W-CHW-176) fits 2007-2018 Buick X5 models. The 2018 model year is the last year covered by this part number. For newer models, check for an updated version.
Yes, the 07 - 18 Buick X5 Curt 2" Class 3 Trailer Tow Hitch + 5-Flat Wiring Kit Tow Boat/Utility Trailer with Surge Brakes 13077 (Part #5W-CHW-176) is designed to fit the 2007-2018 Buick X5.
The 07 - 18 Buick X5 Curt 2" Class 3 Trailer Tow Hitch + 5-Flat Wiring Kit Tow Boat/Utility Trailer with Surge Brakes 13077 (Part #5W-CHW-176) Refer to the included instructions for installation details. Basic hand tools are typically all you need.
When used as a weight carrying hitch, the gross load capacity is not specified in the manual (the specification page shows a blank value). When used as a weight distribution hitch, the gross load capacity is 6,000 lbs trailer weight and 600 lbs tongue weight. However, you must not exceed your vehicle manufacturer's recommended towing capacity, which may be lower. Contact Curt technical support at 1-877-287-8634 for the weight carrying capacity specification.
Yes, Curt hitch 13077 is designed for BMW X5 and X6 models from 2007 to present. The installation instructions are specific to these vehicles. If your X5 or X6 is 2007 or later, this hitch is compatible.
No. The manual states: 'OEM tow hooks can no longer be used at rear of vehicle' after this hitch is installed. The hitch installation requires removal and modification of the rear bumper fascia, which makes the factory tow hooks inaccessible.
Required tools are: 8mm and 18mm sockets, ratchet, 8-inch socket extension, torque wrench, plastic rivet gun, aviation shears, tape measure, pry tool, and safety glasses. A torque wrench is essential because all M12 hardware must be torqued to exactly 82 lb-ft.
The hitch includes 8 M12×1.5 Class 10.9 hex nuts (part 20-00133), 8 S-CON 1/2-inch washers (part 30-00149), and 4 black 1/4-inch rivets (part 10-10501). The hitch mounts to existing weld studs on both frame rails; no drilling is required.
The manual states: 'To ease installation, 2 people may be required.' This suggests that while one person may be able to complete the installation, having a second person will make the job easier, particularly when handling the bumper fascia and beam removal and when raising the hitch into position.
The installation is rated as 'Challenging'. The manual recommends reading all instructions thoroughly before beginning and suggests contacting an authorized Curt installer if you are hesitant to undertake the task on your own. Technical support is available at 1-877-287-8634.
No. The manual clearly states 'NO DRILLING REQUIRED'. The hitch mounts to existing weld studs on both frame rails using the supplied M12 hardware.
Yes. The manual states 'FASCIA TRIMMING REQUIRED'. In step 7, you must trim the bumper fascia as shown in the trim diagram using aviation shears. The trim diagram shows cuts of 4.00 inches and 2.25 inches. The manual notes that all dimensions are approximate, so you should confirm fit prior to trimming.
The manual states: 'Once removed return bumper beam to owner.' This indicates the bumper beam is removed during installation but should be returned to the vehicle owner. The manual does not specify whether it is reinstalled on the vehicle or retained separately by the owner.
All M12 hardware must be torqued to 82 lb-ft (foot-pounds). This is a critical specification; use a calibrated torque wrench to ensure proper fastener tension.
Follow these steps in order: (1) Remove 2 plastic rivets from each wheel well opening, pull back wheel well cover, and remove 1 fastener on each side using 8mm socket. (2) Unclip 1 reflector on each side and remove 1 fastener on each side using 8mm socket. (3) Remove 6 fasteners on the bottom of the bumper fascia and unplug electrical harness if present. On 2011–present models, remove tail lights via trunk access panel and remove 2 nuts on each side using 8mm socket. (4) Release press-in tabs along the top of the bumper fascia and remove it. Remove 4 nuts on each side using 18mm socket to remove the bumper beam. Lowering the tailgate to 45 degrees allows access to upper mounting nuts.
Raise the hitch into position aligned with the existing weld studs on both frame rails. Secure it using the supplied M12 hardware (8 nuts and 8 washers). Then torque all M12 hardware to 82 lb-ft using a torque wrench.
After trimming the fascia as required and confirming fit, reinstall it onto the vehicle using the provided black 1/4-inch rivets. Use a plastic rivet gun to secure the fascia. The manual notes that OEM tow hooks can no longer be used at the rear of the vehicle after installation.
Wear safety glasses at all times while installing this product. Read all instructions thoroughly before beginning. If you are hesitant to undertake this task on your own, contact an authorized Curt installer for additional assistance. Technical support is available at 1-877-287-8634.
All non-trailer loads applied to this hitch must be supported by auxiliary stabilizing straps. Failure to properly support non-trailer loads will void the product warranty. This applies to any load that is not a trailer (such as cargo carriers, bike racks, or other accessories).
You must never exceed your vehicle manufacturer's recommended towing capacity. This is a critical safety requirement stated in the manual. Even though the hitch has a rated capacity (6,000 lbs trailer weight and 600 lbs tongue weight for weight distribution mode), your BMW's manufacturer specifications may be lower and must be followed.
Periodically check the hitch to ensure that all fasteners are tight and that all structural components are sound. This is an ongoing maintenance requirement, not a one-time check. Regular inspection helps prevent loosening of fasteners due to vibration and use.
The manual states to 'periodically check' all fasteners to ensure they are tight and all structural components are sound. While a specific interval is not provided, periodic checks should be performed regularly during the life of the hitch, particularly after initial installation and before each towing trip.
Yes, Curt 13077 fits BMW X5 and X6 models from 2007 to present.
No drilling is required. The hitch mounts to existing weld studs on the frame rails. Fascia trimming is required using aviation shears.
You need 8mm and 18mm sockets, ratchet, 8-inch socket extension, torque wrench, plastic rivet gun, aviation shears, tape measure, pry tool, and safety glasses.
All M12 hardware must be torqued to 82 lb-ft using a calibrated torque wrench.
As a weight distribution hitch: 6,000 lbs trailer weight and 600 lbs tongue weight. You must not exceed your vehicle manufacturer's recommended towing capacity, which may be lower.
Two people may be required to ease installation, though one person may be able to complete it.
Wear safety glasses at all times during installation. All non-trailer loads must be supported by auxiliary stabilizing straps. Never exceed your vehicle manufacturer's recommended towing capacity.
The CURT taillight converter (56496) is a module that converts a vehicle's taillight wiring to a 4-flat trailer connector. It allows you to connect a trailer with a 4-flat plug to vehicles that do not have a factory trailer connector. The converter interprets your vehicle's existing taillight signals (brake, turn, and tail lights) and outputs them through the 4-flat connector to power the trailer lights.
The converter is designed for SUVs, mini and full-sized vans, passenger cars, and pickup trucks. The manual provides wiring location guides for three vehicle categories: SUVs/vans (S-series locations), passenger cars (P-series locations), and pickup trucks (T-series locations). However, the manual does not provide a specific year, make, or model compatibility list. Contact CURT or consult a fitment database to confirm compatibility with your specific vehicle.
The converter is designed only for 12-volt negative ground electrical systems. Before purchasing, confirm your vehicle uses a 12-volt negative ground system. If your vehicle uses a different voltage or positive ground system, this converter will not work. Check your vehicle owner's manual or contact the vehicle manufacturer to verify your system type.
Included with the converter: snap locks, double-sided tape, cable ties, ground screw, and white ground wire with ring terminal. You must source separately: 12 gauge wire (or larger), 10-amp fuse (maximum), fuse holder, butt connectors, and ring terminal. Alternatively, CURT part 55151 is a kit that includes these items. Tools needed: multimeter or test light for wiring identification, wire strippers, and a drill with 3/32" bit (if drilling a ground hole is necessary). A socket wrench or screwdriver may be needed to disconnect the battery terminal.
Yes. Step 3 of the installation instructions requires you to locate the vehicle battery and disconnect the negative battery terminal before wiring the converter. The negative terminal must remain disconnected until Step 7, after all wiring is complete and the fuse is installed. This prevents electrical shorts and damage during installation.
The manual provides a 'How to Determine Vehicle Wiring Types' procedure on page 2. With the vehicle running and all lights off, probe the taillight connectors (still connected to the vehicle) using a multimeter set to DC volts or a test light. Wires carrying less than 2 volts (or that do not illuminate a test light) are not used. Then activate each light circuit (left turn, right turn, tail, brake) one at a time and probe the remaining wires to identify which wires carry which signals. This determines whether your vehicle has a two-wire system (combined stop/turn with independent tail) or three-wire system (independent stop, turn, and tail signals). This information is essential for correctly splicing the converter wires in Step 4.
Mount the converter near the taillight. The manual provides a wiring location guide showing eight possible locations for SUVs/vans (S1–S8), seven for passenger cars (P1–P7), and five for pickup trucks (T1–T5). These locations are behind taillight housings, rear bumpers, rear access panels, or under rear floor panels, depending on vehicle type. Once you have selected the location, adhere the black converter box using the provided double-sided tape and secure it with the included cable ties. Ensure the area is clean and dry before applying the tape.
In Step 4, use snap locks to attach the converter's input wires to the corresponding vehicle harness wires. The converter has four input wires: red (brake), yellow (left turn), green (right turn), and brown (tail). The wiring installation table on page 3 shows which converter wire splices to which vehicle wire, depending on whether your vehicle has a two-wire or three-wire system. For a two-wire system: green splices to the right stop/turn wire, yellow to the left stop/turn wire, brown to the tail wire, and red is grounded. For a three-wire system: green splices to the right turn wire, red to the stop wire, yellow to the left turn wire, and brown to the tail wire. Photos A, B, and C on page 3 show how to install the snap locks.
In Step 6, locate a suitable grounding point near the taillight. The white ground wire has a ring terminal attached. If an existing screw with nut is available in the vehicle frame, attach the ring terminal to that screw. If not, drill a 3/32" pilot hole in a clean, rust-free, paint-free area of the vehicle frame and use the provided screw to secure the ring terminal. Before drilling, check for hidden items behind or under surfaces to avoid damage and personal injury.
Route 12 gauge wire (or larger) from the converter's black power wire to the vehicle battery positive (+) terminal, taking care to avoid pinch points and hot or rotating components. At the battery, use a ring terminal (not included) to attach the wire to the positive post. Install a 10-amp fuse (maximum) in a fuse holder (not included) on this power wire, positioned as close to the battery as possible. Install the fuse only after all other wiring steps are complete. The negative battery terminal must remain disconnected until the fuse is installed.
In Step 7, secure any loose wires with the provided cable ties. This prevents wires from moving, chafing, or becoming pinched during vehicle operation. Route the 4-flat connector to the center of the vehicle when in use, and secure it in a convenient out-of-the-way location when not in use.
The converter is rated for a maximum of 3.0 amps per signal circuit (left turn, right turn, brake) and 6.0 amps total for tail and running circuits. Do not exceed these ratings. Also do not exceed your tow vehicle's lamp load rating, whichever is lower. Exceeding the product rating can cause loss of warranty, overheating, and potential fire.
The battery connection must be fuse-protected with a 10-amp maximum fuse. Do not use a fuse larger than 10 amps. The fuse holder and fuse are not included and must be purchased separately, or as part of CURT part 55151 kit. Install the fuse after all other wiring steps are complete and immediately before reconnecting the negative battery terminal.
Use 12 gauge wire or larger to route from the converter's black power wire to the vehicle battery. This wire must be routed carefully to avoid pinch points and hot or rotating components. The wire is not included and must be purchased separately, or as part of CURT part 55151 kit.
The converter has four input wires: red (brake signal), yellow (left turn signal), green (right turn signal), and brown (tail/running light signal). There is also a white ground wire with a ring terminal. Each input wire is spliced to the corresponding vehicle taillight wire using snap locks, according to your vehicle's wiring type (two-wire or three-wire system). The black power wire connects to the vehicle battery positive terminal through a fused connection. The white ground wire connects to the vehicle frame or body.
Before drilling any holes, check for miscellaneous items (wires, fuel lines, brake lines) that may be hidden behind or under surfaces to avoid damage and personal injury. Disconnect the negative battery terminal before beginning any wiring work. When routing the power wire to the battery, avoid pinch points and hot or rotating components. Ensure the area where you ground the converter is free of rust, dirt, and paint. Do not exceed the converter's amperage rating (3.0 amps per signal circuit, 6.0 amps total for tail/running) or your vehicle's lamp load rating, as this can cause overheating and fire. Use a 10-amp maximum fuse on the battery connection.
The manual provides two testing methods. Method 1 (test light): Attach the ground lead of the tester to the exposed ground terminal of the 4-flat connector. Activate the tow vehicle's left turn, right turn, tail, and brake lights one at a time. Probe the three receptacles of the 4-flat to confirm proper functionality. Method 2 (trailer): Mate the 4-flat with a trailer and run the same test using the trailer lights. If a function on the trailer lights does not work, disconnect the trailer 4-flat, turn the vehicle functions off, and recheck with a circuit tester. If the circuit tester shows the function is good, the problem is with the trailer, not the converter.
Included: snap locks, double-sided tape, cable ties, ground screw, and white ground wire with ring terminal. Not included: 12 gauge wire, 10-amp fuse, fuse holder, butt connectors, and ring terminal for the battery connection. These items must be purchased separately or as part of CURT part 55151 kit, which is sold separately.
After securing all loose wires with cable ties and installing the fuse on the battery power wire, reinstall all items you removed during installation (trim panels, bumpers, etc.). Reconnect the negative battery terminal. When the converter is in use, route the 4-flat connector to the center of the vehicle. When not in use, secure the connector in a convenient out-of-the-way location to prevent damage.
The converter fits SUVs, vans, passenger cars, and pickup trucks with 12-volt negative ground systems. The manual does not provide a specific year/make/model list. Contact CURT or check a fitment database with your vehicle details to confirm compatibility.
You must source: 12 gauge wire, 10-amp fuse, fuse holder, butt connectors, and a ring terminal for the battery. These are available separately or as CURT part 55151 kit.
Yes. Disconnect the negative battery terminal in Step 3 before wiring, and keep it disconnected until the fuse is installed in Step 7.
Drilling may be required. If a suitable existing screw is not available near the taillight for grounding, you must drill a 3/32" pilot hole in the vehicle frame. Before drilling, check for hidden items (wires, fuel lines) behind or under surfaces to avoid damage.
Maximum 3.0 amps per signal circuit and 6.0 amps total for tail/running circuits. Do not exceed these ratings or your vehicle's lamp load rating, whichever is lower.
Before drilling, check for hidden items (wires, fuel lines, brake lines) behind or under surfaces to avoid damage and personal injury.
Disconnect the trailer 4-flat connector from the converter. Turn off the corresponding function on the vehicle (e.g., turn off the left turn signal if the left turn on the trailer is not working). Recheck the function using a circuit tester on the 4-flat receptacles. If the circuit tester shows the function is working properly, the problem is with the trailer, not the converter. If the circuit tester shows the function is not working, the converter or vehicle wiring connection may be faulty.
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