The most common cause in the UAE is a short circuit in the horn assembly or steering wheel wiring, often triggered by dust, extreme heat, or a faulty relay. GCC-spec vehicles like the Toyota Land Cruiser and Nissan Patrol are susceptible, as desert driving on dusty roads near Liwa or Jebel Jais allows fine sand to infiltrate the steering column contacts. According to the RTA Dubai's vehicle inspection guidelines for 2024, electrical faults are a leading cause of non-pass issues in older models. Simultaneously, the GSO's standards for vehicle electrical components highlight relay failure rates increase in sustained high-temperature environments common in the Gulf. For a 2018 Toyota Prado, a complete diagnostic at an RTA-approved garage in Dubai might cost around 450-600 AED, including parts and labor. The total expense is often the sum of the relay unit (approx. 120 AED), wiring check, and labor. Annual depreciation can increase slightly if such electrical issues are noted in the vehicle's service history, affecting resale value on platforms like Dubizzle. My advice is to first check for visible dust around the steering wheel buttons, a common quick fix for many UAE owners.
- Horn relay cost: ~120 AED
- Modern vehicle costs up to 600 AED
- oldest models cost less due to simpler systems
