2018 Toyota Highlander Towing Capacity & Payload

The 2018 Toyota Highlander can tow between 1,500 lbs and 5,000 lbs, depending on the engine and drivetrain configuration.

Quick Answer

• Max Towing Capacity: 5,000 lbs
• Max Payload Capacity: 1,445 lbs
• GVWR (Gross Vehicle Weight Rating): 5,840 lbs
• GCWR (Gross Combined Weight Rating): 9,500 lbs (V6 FWD/AWD)
• Curb Weight: 4,135 lbs (LE 4-cylinder FWD) to 4,505 lbs (Limited Platinum V6 AWD)
• Hitch Class: Class III (when properly equipped with V6 engine)
• Max Tongue Weight: 500 lbs (V6 models)

Tow Ratings by Engine & Trim

The 2018 Toyota Highlander's towing capacity varies significantly with its engine and drivetrain. The 4-cylinder engine is suitable for very light loads, while the V6 offers a much more capable towing experience.

Note: Payload capacity can vary based on specific options and vehicle configuration. Always check your vehicle's door jamb sticker for the most accurate payload rating.

Tow Package Contents

For 2018 Toyota Highlander V6 models, the available tow package (often standard on certain trims or a dealer-installed option) is crucial for reaching the maximum 5,000 lb towing capacity. Key components typically include:

• Heavy-Duty Radiator with Engine Oil Cooler: Helps manage engine temperatures under increased load.
• Heavy-Duty Fan: Provides increased cooling airflow.
• 150-Amp Alternator: Ensures sufficient electrical power for the vehicle and trailer.
• Trailer Sway Control (TSC): An advanced safety feature that works with the Vehicle Stability Control (VSC) system to detect and counteract trailer sway, applying brake pressure to individual wheels and/or reducing engine power to help bring the trailer back in line. This is a significant safety benefit when towing.
• Pre-wired Harness with a 4-pin and 7-pin Connector: Provides electrical connections for trailer lights (4-pin) and additional functions like trailer brakes and auxiliary power (7-pin). This makes installing an aftermarket trailer brake controller much simpler.

It's important to note that while the Highlander comes pre-wired for a 7-pin connector, an integrated trailer brake controller is not typically included from the factory. Owners will need to purchase and install an aftermarket brake controller for trailers equipped with electric brakes.

5th-Wheel & Gooseneck

The 2018 Toyota Highlander is a unibody crossover SUV and is not designed for 5th-wheel or gooseneck towing. These types of trailers require a heavy-duty truck frame and specialized hitches mounted in the truck bed. Attempting to tow a 5th-wheel or gooseneck trailer with a Highlander would severely damage the vehicle and create an extremely dangerous towing situation.

Weight Distribution & WDH Requirements

For the 2018 Toyota Highlander, especially when approaching its maximum 5,000 lb towing capacity, a weight-distributing hitch (WDH) is highly recommended. While Toyota does not explicitly mandate a WDH for all towing within the V6's capacity, a WDH helps to:

• Distribute weight more evenly: It transfers some of the tongue weight from the rear axle to the front axle of the tow vehicle and the axles of the trailer. This restores proper steering and braking control.
• Improve stability: Reduces sag in the rear of the vehicle and helps prevent trailer sway by maintaining a level towing attitude.
• Maintain headlight aim: Prevents the front of the vehicle from rising, keeping headlights properly aimed at the road.

Consult your Highlander's owner's manual for specific WDH recommendations based on your trailer's loaded weight. Generally, for trailers exceeding 50% of the vehicle's maximum tow capacity, a WDH is a wise investment for safety and performance.

Real-World Towing Tips for this Vehicle

• Understand Your Actual Weights: Never rely solely on advertised dry weights for your trailer. Always weigh your loaded trailer at a public scale (CAT scale) to know its actual gross weight and tongue weight. Also, know your vehicle's curb weight, GVWR, and GCWR.
• Payload Matters: Remember that your payload capacity includes all passengers, cargo, and the tongue weight of your trailer. Overloading the payload can be just as dangerous as exceeding the tow capacity.
• Check Tire Pressure: Ensure both your Highlander's tires and your trailer's tires are inflated to the manufacturer's recommended pressures for towing, typically found in your owner's manual or on a sticker near the driver's door.
• Practice Safe Driving Habits: Allow for increased braking distances, accelerate gradually, and avoid sudden maneuvers. Factor in headwinds, inclines, and traffic when planning your trips.
• Trailer Brake Controller: If your trailer has electric brakes, installing and properly setting up an aftermarket trailer brake controller is essential for safe stopping. The Highlander's 7-pin connector simplifies this installation.
• Transmission Cooler: While the V6 tow package includes an engine oil cooler and heavy-duty radiator, keeping an eye on your transmission temperature, especially during long climbs or hot weather, is always prudent. Synthetic transmission fluid can also offer added protection.
• Pre-Trip Inspection: Before every tow, check all lights (vehicle and trailer), tire pressures, fluid levels, hitch connection, safety chains, and brake connections.

Common Towing-Related Issues

• Transmission Overheating: Especially with the 4-cylinder engine or when towing heavy loads with the V6 without proper cooling, the transmission can overheat, leading to premature wear or failure. The V6 tow package helps mitigate this.
• Rear Suspension Sag: Heavy tongue weight can cause the rear of the Highlander to sag, affecting handling, steering, and headlight aim. A Weight-Distributing Hitch is the best solution for this.
• Reduced Braking Performance: The added weight of a trailer significantly increases stopping distances. Ensuring trailer brakes are functional and properly adjusted is critical.
• Tire Wear: Towing puts extra strain on tires, leading to faster wear, especially on the rear axle. Maintaining correct tire pressure and rotation schedules is important.

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