When using the tow package to carry accessories, the 5 cm x 5 cm square hitch receiver is designed to support vertical loads of up to 72 kg. Ball mounts that are compatible with the square receiver must be purchased separately.

To install and use an accessory carrier, you must first attach the ball mount to the hitch receiver (see Attaching and Removing the Ball Mount). Then, follow the instructions provided by your accessory carrier. Observe all regulations and legal requirements in your state or region that apply to carrying accessories.

The Model Y towing package includes the wiring necessary for using an accessory carrier equipped with lights (see Electrical Connections). The package also includes Trailer Mode software compatibility (see Trailer Mode).

The maximum trailer weight (including all cargo and additional equipment), and the trailer tongue weight depend on the number of occupants in your vehicle and the tires being used. The maximum towing capacity and trailer tongue weight must never exceed the following:

** You must operate within the speed limitations of your trailer and tires, and only drive at speeds appropriate for the load you are towing, the weather, road and traffic conditions, and your level of towing experience. Always obey posted speed limits and local regulations regarding speed.

For trailers with a combined loading of more than 750 kg, Tesla recommends using a separate braking system with an independent controller (see #TRAILERBRAKES). Carefully follow the instructions provided by the trailer brake manufacturer to ensure that trailer brakes are properly installed, adjusted, and maintained.

The tongue weight is the downward force that the weight of the trailer exerts on the hitch. This must not exceed 10% of the maximum trailer weight. Carrying a significant amount of equipment, passengers, or cargo in the tow vehicle can reduce the towing capacity it can handle, which also reduces the tongue weight. Maximum towing capacity is calculated assuming the is not exceeded (see Specifications).

When towing a trailer, tire pressures must be adjusted to accommodate the additional load. 19", 20", and 21" tires are acceptable to use for towing. Keep tires inflated to the pressures shown below (if different, these pressures override the pressures that are provided on the Tire and Loading Information Label (see Vehicle Loading)).

Before towing a trailer, you must do the following:

• Inflate tires to the cold tire inflation pressure specified in Tire Pressures when Towing.
• Observe all regulations and legal requirements that apply to trailer towing. Failure to comply with regulations can compromise your safety.
• Adjust side mirrors to provide a clear rear view without a significant blind spot.
• Engage Trailer Mode (see Trailer Mode).

Confirm the following:

• Model Y rests horizontally with the trailer attached. If the vehicle is tipped up at the front and down at the rear, check that you are not exceeding the maximum towing capacity and tongue loads provided in Trailer Towing.
• Trailer lights (brake lights, turn signal lights, and marker lights) are working properly.
• The trailer tongue is securely connected to the hitch ball.
• Safety chains are properly connected between the trailer and the tow vehicle. Cross the safety chains under the tongue of the trailer to help prevent the tongue from contacting the road if it separates from the hitch. Leave enough slack in the safety chains to allow for turns and ensure that the chains do not drag on the ground.
• All trailer hitch parts and attachments, safety chains, and electrical connectors are in good condition and are properly connected. If any problems are apparent, do not tow the trailer.
• All cargo is secured.
• Wheel chocks are available.
• The trailer load is evenly distributed such that the trailer tongue weight is approximately 4-10% of the total trailer weight, without exceeding the maximum tongue weights provided in Trailer Towing.
  CAUTION

  Loads that are balanced over the trailer wheels or heavier in the rear can cause trailer sway, resulting in loss of vehicle control.

Model Y is designed primarily as a passenger-carrying vehicle. Towing a trailer puts additional load on the motor(s), drive train, brakes, tires, and suspension and significantly decreases range. If you decide to tow a trailer, proceed with caution and follow these general guidelines:

• Reduce your driving speed and avoid sudden maneuvers. When towing a trailer, steering, stability, turning radius, stopping distance and braking performance are different when compared to driving without a trailer.
• Increase your following distance by maintaining at least twice the distance from the vehicle ahead. This helps to avoid situations that require heavy braking. Sudden braking may result in skidding or jack-knifing, and loss of control.
• Avoid sharp turns. Sharp turns can cause the trailer to contact the vehicle and cause damage. Keep in mind that the trailer wheels are closer to the inside of the turn than the vehicle’s wheels. Therefore, make wider turns to prevent the trailer from hitting curbs, road signs, trees or other objects.
• Periodically check the trailer lights and turn signals to confirm that the bulbs are still working. When towing a trailer, the turn signal arrows on the touchscreen flash as normal, even if the bulbs on the trailer are burned out.
• Periodically confirm the cargo is secure.
• Regularly confirm that all towing components are securely tightened.

Trailer Mode must always be active when towing a trailer. When you connect a trailer’s electrical connection while the vehicle is in Park, Model Y automatically engages Trailer Mode. When you disconnect the trailer’s electrical connection, Trailer Mode does not automatically disengage. To manually engage or disengage Trailer Mode, touch Controls > Dynamics > Trailer Mode on the touchscreen. One of the following indicators displays:

Trailer Mode is active.

Model Y detects a connection for trailer lights but Trailer Mode is disabled. It is likely that a carrying accessory has been connected.

Model Y detects a faulty electrical connection for the trailer lights. Some, or all, trailer lights may not be functioning. Pull over as soon as safety permits and inspect the trailer lights for faulty cabling or connections. If the issues are resolved and the red icon still persists, disable and re-enable Trailer Mode once more.

Some Autopilot features, as well as rear parking sensor functionality, may not be available when Trailer Mode is enabled. In addition, these features operate differently:

• Traffic-Aware Cruise Control increases the following distance from the vehicle in front of you.
• Side collision warnings are active but automatic steering interventions are disabled.
• The braking force provided by Automatic Emergency Braking (see Collision Avoidance Assist) may be limited. Therefore, stopping distance may increase.

When towing a loaded trailer that weighs more than 750 kg, Tesla recommends that the trailer be equipped with its own brake system adequate for the weight of the trailer. Ensure compliance with local regulations. A brake controller must be purchased separately, and the required 4-pin pigtail connector can be ordered from Tesla Service. Follow these steps to connect the trailer brake controller:

1. Open the passenger side front door and lower the passenger side window.
2. Remove the assembly pillar by removing the clips with a small, flat trim tool.
3. Remove the clip securing the passenger side lower A-pillar trim with a small, flat trim tool.
4. Remove the 6 push clips on the footwell cover.
5. Remove the footwell cover; you will need to disconnect the 2 connector cables on the footwell cover.
6. Remove the lower A-pillar door trim.
7. Remove the passenger carpet.
8. The trailer brake connection should be exposed. Keep all parts in a dry, secure location. Repeat these steps in reverse when you are done with the trailer connection.

Whenever possible, avoid parking on a grade. However, if parking on a grade is absolutely necessary, place wheel chocks under the trailer wheels. Consider having someone help you with these steps:

1. One person presses and holds the brake pedal.
2. A second person places the wheel chocks under the wheels on the downgrade side of the vehicle's tires.
3. When the chocks are in place, release the brake pedal and ensure the chocks hold the weight of the vehicle and trailer.
   Note

   When testing chocks, ensure that Vehicle Hold (see Vehicle Hold) is not engaged. If Vehicle Hold is braking Model Y, the Vehicle Hold indicator light displays on the touchscreen. To disengage Vehicle Hold, press and release the brake pedal.
4. Place the vehicle in Park.

When trailer sway is detected, the electronic stability control system attempts to apply the appropriate amount of braking to minimize trailer sway. The touchscreen briefly displays the traction control system indicator. Pressing the brake pedal when the system is actively braking to mitigate trailer sway does not cancel this automatic braking.

The Model Y towing package does not include a ball mount. You must purchase a ball mount suitable for the type of trailer you are towing. The Model Y hitch receiver supports a ball mount with a length of up to 22 cmand a rise of up to 2 cm. Do not use any type of drop ball mount that does not meet these requirements.

To attach a ball mount:

1. Use a thin object, such as a butter knife or flat blade screwdriver, to pry around the edges of tow hitch cover and release the 15 clips that secure the cover to the rear fascia. Store the dust cover in a secure location.

   

2. If necessary, remove the cotter pin from the locking bolt and slide the locking bolt out of the hitch assembly.
3. Slide the ball holder into the hitch assembly.
4. Align the hole in the ball holder with the one in the hitch assembly.
5. Slide the locking bolt through the hitch assembly/ball holder.
6. Insert the cotter pin in the hole at the end of the locking bolt.

To remove a ball mount:

1. Remove the cotter pin from the locking bolt and slide the locking bolt out of the ball holder/hitch assembly.
2. Pull the ball holder out of the hitch assembly.
3. Re-install the dust cover for the hitch housing and store the ball mount in a secure location.

Regulations require all trailers to be equipped with tail lights, brake lights, side marker lights, and turn signals. To provide power for trailer lighting, a built-in 7-pin wiring connector is provided near the hitch support's wiring plugs for most types of trailers. Plugging in trailer wiring into the Model Y electrical connector automatically engages Trailer Mode (see Trailer Mode). It is the driver’s responsibility to ensure that all electrical connections are working and all trailer lights are operating before and during towing. You must perform manual checks.

1. Left Turn Signal
2. Reverse Lights
3. Ground
4. Right Turn Signal
5. Brake Controller Output
6. Brake Light
7. Tail Lamps

Loss of trailer lights when towing may be the result of a fault in the trailer wiring or excessive power consumption by the lights connected to the trailer output(s). When this occurs, a red Trailer Mode icon appears on the touchscreen. Fix any issues with the wiring and/or reduce the number of lights connected to the trailer output(s), then toggle Trailer Mode off and on again.

Towing a trailer increases vehicle weight and drag. As a result, driving range can decrease significantly. Although Trip Planner (if available in your market region) attempts to adjust estimates based on Trailer Mode, actual energy consumption may vary. Plan trip length and charging destinations accordingly.