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Reese Towpower
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The Tekonsha Brakeman IV digital trailer brake controller provides safety and connection when you need it most. As a time-based controller, the Brakeman IV is a great choice for basic, light-duty towing needs. This compact controller works by electronically connecting your vehicle and your trailer. When you hit the brakes in your tow vehicle, it generates an output signal that ramps up, or increases over a period of time, applying braking power to your trailer at a fixed rate. The Brakeman IV has up-front buttons so you can easily adjust power output, the sync ? or aggressiveness with which the controller applies the brakes, and engage manual override to help you brake safely when an unexpected stop pops up. It also works with electric or electric over hydraulic braking systems, and features advanced internal circuit protection, real time comprehensive diagnostics, and short circuit protection. Because the Brakeman IV is a time-based controller, there?s no requirement that it be positioned in the direction of travel; it can be installed anywhere you like as long as it is within reach of the driver. Plus, the Plug & Play feature allows for quick and easy connection with your vehicle?s wiring. The Brakeman IV trailer brake controller works with1-4 axle trailers, comes with all the mounting hardware needed for installation, and is backed by a limited lifetime warranty.
| BRAND: | Reese Towpower |
| PART NUMBER: | 8507111 |
| WEIGHT: | 0.6 LBS |
| MATERIAL: | PLASTIC |
| BRAKE CONTROL TYPE: | TIMED |
| TRAILER BRAKE WHEEL QUANTITY: | UP TO EIGHT WHEELS |
| BRAKE TYPE: | Electric |
| Diagnostic Capable: | YES |
| DISPLAY TYPE: | DIGITAL OUTPUT |
| HYDRAULIC CONNECTIONS: | NO |
| SOLID STATE CONSTRUCTION: | YES |
| CIRCUIT BREAKER PROTECTED: | YES |
| HOUSING COLOR: | BLACK |
| BRACKET INCLUDED: | YES |
Reese Towpower delivers the towing hardware most drivers reach for: receiver hitches across multiple classes, ball mounts, hitch balls, pins, clips, safety chains, wiring and hitch accessories. Backed by a towing pedigree dating to 1952, the line uses all-welded construction and corrosion-resistant finishes, with custom-fit hitches matched to vehicle make, model and year.
The Reese story starts in 1952, when Margaret Reese challenged her husband TJ to do something about travel trailers rocking whenever anyone walked through them. A few years later he built the first pair of stabilising jacks. The idea was simple and it worked, and it changed how the RV industry thought about trailer stability. From that beginning the Reese name grew into a full towing line covering fifth wheel hitches, pin boxes, weight distribution systems and accessories, and Reese Towpower carries that engineering into the products most owners buy off the shelf.
Receiver trailer hitches anchor the range, offered across the classes needed for everything from a small utility trailer to livestock and job-site loads. Construction is all-welded rather than bolted at the stress points, and each hitch is tested against published standards for strength and safety. Custom-fit hitches are engineered to the vehicle manufacturer's weight specifications for a given model and model year, so mounting points line up with existing frame holes and the finished installation sits where it should. Exclusive paint finishes resist rust and corrosion through years of road salt, and hitches carry a nationwide limited lifetime warranty.
No towing setup is complete without the connecting hardware, and Reese Towpower covers it comprehensively. Ball mounts come in fixed, adjustable and specialty forms with a range of rises and drops to level a trailer properly. Hitch balls are offered in the standard diameters and shank sizes, matched to coupler and load rating.
The towing accessories line fills in everything else: hitch pins and clips, locks, receiver tube covers, and safety chains rated to the load being pulled. For most drivers this is where a towing purchase actually begins, and having the whole chain of components from one engineering source keeps ratings consistent end to end.
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1 compatible vehicles
| Year | Make & Model | Notes |
|---|---|---|
| 2007 - 2026 | BMW X5 | w/Factory 7: Way |
The 2007-2026 BMW X5 w/Factory 7-Way Brakeman IV Time?Delay Brake Controller for Trailers with 1?4 Axles, Black 8507111 (Part #8507111 70307) fits 2007-2026 BMW X5 models. The 2026 model year is the last year covered by this part number. For newer models, check for an updated version.
Yes, the 2007-2026 BMW X5 w/Factory 7-Way Brakeman IV Time?Delay Brake Controller for Trailers with 1?4 Axles, Black 8507111 (Part #8507111 70307) is designed to fit the 2007-2026 BMW X5.
The 2007-2026 BMW X5 w/Factory 7-Way Brakeman IV Time?Delay Brake Controller for Trailers with 1?4 Axles, Black 8507111 (Part #8507111 70307) fits the following vehicles: 2007-2026 BMW X5. Always verify your specific year, make, and model before ordering.
The 2007-2026 BMW X5 w/Factory 7-Way Brakeman IV Time?Delay Brake Controller for Trailers with 1?4 Axles, Black 8507111 (Part #8507111 70307) Refer to the included instructions for installation details. Basic hand tools are typically all you need.
The 3037-037 is an Electric Trailer Brake Control Wiring Adapter designed to connect a brake control harness to the existing electrical system in a BMW X5. It allows the brake control to interface with the vehicle's factory wiring.
Yes, the 3037-037 is designed for BMW X5 vehicles. The adapter connects to an existing black 4-pin connector located on the passenger side near the tail light pocket.
The brake control harness connects to an existing black 4-pin mating connector located on the passenger side of the BMW X5 near the tail light pocket.
Two tools are required: a test-probe and a trim panel remover.
The manual requires that the vehicle be off with the keys removed from the ignition before beginning installation. No specific instruction to disconnect the battery is provided.
Remove the following from the passenger side: cargo compartment trim panels and floor coverings, door sill and lower trim panels, front door sill, dashboard lower trim panels under the glovebox, and passenger side console trim panel. Set all removed items aside.
Route the brake control harness along the existing wire harness, down the door sill to the front passenger compartment, then up under the dashboard and across to the driver's side compartment. Avoid pinching or breaking the wire at any point, especially if routing through a grommet.
Reinstall all plastic trim panels, threshold, storage covers, floor covering and other items removed during installation. Be careful not to pinch or cut the wires during reinstallation.
Do not exceed the lower of the towing manufacturer rating (including in your vehicle owner's manual) or the specific amperage ratings stated on the product itself.
Always wear safety glasses during installation. Follow all warnings and instructions included with the product and the brake control manufacturer's instructions. Read and understand all warnings printed on the tow vehicle's battery. Avoid pinching or breaking wires during routing and reinstallation.
Yes. The manual explicitly states to follow all brake control manufacturer's installation instructions. This adapter is a wiring interface; the brake control unit itself will have additional setup and configuration requirements.
BMW X5.
Test-probe and trim panel remover.
Yes. Remove passenger side cargo compartment trim panels, floor coverings, door sill, lower trim panels, dashboard trim under the glovebox, and console trim panel.
To the existing black 4-pin connector on the passenger side near the tail light pocket.
Vehicle must be off with keys removed from ignition. Wear safety glasses and follow all warnings on the product and tow vehicle battery.
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