No, a properly functioning automatic car will not roll away simply because the handbrake is not applied—if it is correctly placed in 'P' (Park). The locking mechanism in the transmission holds the vehicle. However, in the UAE, relying solely on the 'P' gear, especially on inclines common in areas like Sharjah's Al Khan or hilly parts of Ras Al Khaimah, places excessive stress on this small component, known as the parking pawl. The extreme summer heat here can also affect brake and transmission fluid consistency, subtly increasing risk. RTA Dubai's vehicle inspection guidelines and common workshop advisories emphasize the integrated use of both systems for safety and longevity. For GCC-spec vehicles like the Toyota Land Cruiser, which are often heavily used, this practice is crucial to prevent costly transmission repairs.
A simple cost comparison for a popular sedan like the Toyota Camry in the UAE illustrates why the combined use is a prudent habit:
| Component | Stress/Cost from 'P' Gear Only | Stress/Cost with Handbrake + 'P' |
|---|
| Transmission (Parking Pawl) | High stress on slopes; potential repair ~AED 2,000-4,000 | Minimal stress; wear is virtually zero |
| Handbrake System | Zero wear | Normal wear; cable adjustment ~AED 100-200 |
- Annual Depreciation Impact: A major transmission fault noted in service history can reduce resale value by 10-15% on platforms like Dubizzle.
- Cost per km: Neglecting the handbrake adds negligible immediate cost, but a potential AED 3,000 repair over 150,000 km of driving adds ~AED 0.02/km risk.
- Total Cost of Ownership (TCO): The minimal maintenance of the handbrake system is far cheaper than transmission intervention. MOI UAE's awareness campaigns on vehicle safety indirectly support this preventive maintenance approach to reduce road incidents caused by vehicle rollaways.
We recommend always applying the handbrake firmly first on any slope, letting the car settle on the brake, and then shifting to 'P'. This transfers the holding force to the rear brakes, which are designed for it, and protects the transmission. For prolonged parking during the summer months, this is non-negotiable.
