Drivers in Mexico City (CDMX) are being cautioned against a common automotive modification that could lead to significant traffic violations: permanent, non-removable tow hitches. Local authorities have clarified that while towing equipment is permitted, the specific design and placement of the hardware are subject to strict regulatory oversight.

The Regulation: Retractable vs. Rigid Accessories

According to Article 42 of the Mexico City Traffic Regulations, any device used to couple trailers or semi-trailers must be equipped with a rotating or retractable mechanism, or be fully removable. The core of the regulation specifies that these components must not protrude beyond the vehicle’s bumper when not in use.

Authorities emphasize that the mere presence of a tow ball does not constitute a violation. Instead, the infraction occurs when rigid accessories remain permanently exposed at the rear of the vehicle. The regulations mandate that vehicle owners must modify installations that do not comply with these standards, though they are permitted to use removable mechanisms provided they do not exceed the bumper’s profile.

Fines and Penalties

Non-compliance with these safety and aesthetic standards can result in substantial fines, ranging from 5 to 10 times the Unidad de Medida y Actualización (UMA)—the standard unit of measurement used to calculate fines in Mexico.

The specific penalty amount depends on the driver’s history and the vehicle’s registration status under Article 64:

• 5 UMA: For drivers with zero to one outstanding penalty.
• 7 UMA: For drivers with two to three outstanding penalties.
• 10 UMA: For drivers with four or more outstanding penalties, or for vehicles with license plates from other states or foreign countries.

In practical terms, these fines typically range from 586.55 to 1,173.10 pesos. However, the regulations offer a 50% discount on the fine if payment is settled within 30 calendar days of the official notification.

Additional Obligations for Active Towing

The regulatory scope expands significantly when a trailer is actually being transported. In such cases, vehicles must adhere to specific safety requirements, including:

• Reflective Bands: White and red bands must be placed on the sides and rear, with yellow bands on the front.
• Lighting: The vehicle must have two clearly visible brake lights.
• Design Standards: The towed unit must be purpose-built as a trailer. Using ropes or the vehicle’s own bumper to pull another motorized vehicle is strictly prohibited, except in immediate emergency situations to clear an obstruction from the roadway.

Compliance Tips for Vehicle Owners

Owners who currently have fixed tow hitches do not necessarily need to remove the entire system. If a vehicle is already engineered for towing, the goal is to ensure the hitch does not remain rigid and protruding. The recommended solution is to install a retractable, rotating, or removable hitch system. This modification allows the hardware to be tucked away when not in use, ensuring the vehicle remains compliant with CDMX traffic laws while retaining towing capabilities.