Many drivers enjoy customizing their cars, whether to improve performance, increase comfort or simply change the aesthetics. However, not all modifications are legal. It is crucial to be aware, as seemingly harmless changes can result in high fines.
Parts and accessories without approval: a hidden risk
According to the Institute of Mobility and Transport (IMT), any component installed in a car must have homologation, that is, approval for use in Portugal. This obligation applies to mechanical parts, decorative accessories and electronic equipment, ensuring that they comply with safety standards and do not compromise the operation of the vehicle.
Among the most frequent modifications that can lead to sanctions are sports exhausts without approval, tires and rims outside the manufacturer’s specifications, or suspension kits altered without technical approval. These changes, common among custom car enthusiasts, can have legal and safety consequences.
Exhausts and exhaust systems: pay attention to fines
Modifications to exhausts to increase the sound or power of the car are among the most closely watched by authorities. Exhausts without approval can produce noise levels above permitted levels and increase pollutant emissions, making the modification illegal. Furthermore, they can affect engine efficiency and braking system performance.
Fines for these infractions vary between 250 and 1250 euros, depending on the severity, according to article 118 of the Highway Code. In some cases, replacement of the original system is required. Periodic inspection of the vehicle makes it easier to detect these irregularities and increases the likelihood of inspection.
Tires and rims: aesthetics that can be expensive
Changes to tires and rims are another common practice. Installing larger rims or tires that do not meet the manufacturer’s specifications can compromise stability and interfere with electronic systems such as ABS and traction control.
Although visually attractive, these changes represent security risks and can lead to IMT fines. Any modification must comply with the approved measures, under penalty of invalidating the vehicle’s warranty.
Modified suspensions: be careful with approval
Some drivers opt for sports suspensions to improve handling or just for looks. However, non-approved suspensions change the height of the car, affecting dynamics, stability and response in emergency situations.
Changes not approved by the authorities may result in high fines and require the vehicle to be returned to its original condition. Failure to communicate these changes may also prevent approval of the periodic inspection.
Accessories and electronic systems: more than a question of style
The installation of powerful sound systems, alarms or other electronic devices without approval is also illegal. Some accessories may interfere with the vehicle’s active safety, including parking sensors or cameras.
Unapproved parts compromise the car’s functioning, can generate fines and even cause insurance problems in the event of an accident.
Supervision and legal consequences
Inspection has been intensified, ensuring that vehicles comply with homologation standards. Fines vary between 250 and 1,250 euros, depending on the severity of the alteration and the risk to road safety. In many cases, it is mandatory to restore the original conditions, generating additional costs.
To avoid problems, it is recommended to use certified workshops that ensure the approval of parts and interventions, guaranteeing legality and safety.
Complying with the law means protecting yourself and others
Illegal changes can result in fines, refusal of inspection, invalidation of insurance and, in extreme cases, a ban on driving until the irregularities are corrected.
The highlights the importance of approval and vigilance for safe driving, remembering that these rules exist to protect all road users.
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