Is it allowed to turn off the engine when driving a small car down a steep slope?

[VonGabriela]

It is not allowed to turn off the engine when driving a small car down a steep slope, as this operation poses significant safety hazards. Consequences of coasting with the engine off: Coasting with the engine off will result in the loss of brake assistance and engine braking force, relying solely on the friction between the brake pads and brake discs for braking. This can easily cause the brake pads to overheat, leading to a loss of braking effectiveness. Additionally, the power steering pump will also fail, resulting in the loss of steering control, creating a dangerous situation with neither steering nor braking. Correct way to descend a steep slope: When descending a steep slope, use engine braking. For manual transmission cars, shift into 1st or 2nd gear, and for automatic transmission cars, shift to L gear. At the same time, avoid pressing the brake pedal for extended periods.

[EvelynRose]

Once I was driving a manual transmission car down a steep mountain road. The slope was particularly steep, and the engine stalled when I accidentally released the throttle. Instantly, the brake pedal became as hard as a rock, and the car started accelerating downhill. I desperately stomped on the brakes and barely managed to stop, almost rear-ending the car in front. After getting home and researching, I learned that once the engine stalls, the brake booster system fails, leaving you to rely solely on leg strength to control the car—extremely dangerous. Now I’ve learned to be smarter: every time I go downhill, I shift to second gear and use engine braking along with the brakes to maintain stable speed. Driving requires constant vigilance—stalling on a downhill slope is absolutely unacceptable. A small mistake can lead to disaster, so safe driving is the top priority.

[Patricia]

As the primary driver in my family, I never dare to turn off the engine when taking my kids out and encountering steep slopes. With the engine running, it provides brake assistance; once turned off, the assistance disappears, significantly reducing braking power. If the vehicle speed gets out of control, the consequences could be severe. I once tested temporary engine shutdown in an automatic transmission car and found the brakes became harder to press. For the safety of my family, I always remind myself: shift to a lower gear when going downhill, use engine braking, and maintain steady throttle to avoid sudden movements. With more related experiences, I pay extra attention to slope driving techniques, such as choosing the inner lane to slow down, regularly checking the brake system, and preventing accidents to ensure the safety of my family.

[OAdrian]

I know a bit about car mechanics, and coasting downhill with the engine off is a bad idea. When the engine is running, it creates vacuum assist for the brakes. After shutting off the engine, the vacuum is lost, making the brake pedal heavy and difficult to operate. Manual transmission vehicles lose engine braking, while automatic transmissions lose assisted control. When descending steep slopes, you should keep the engine running, shift to a lower gear to slow down, and gently apply the brakes. From a safety perspective, this practice prevents the car from coasting out of control and ensures stable driving.

[VanCassidy]

I've been driving all my life, and stalling on a steep slope is a major taboo. When I was younger, a friend's engine died while going downhill, the brake assist disappeared, and the car suddenly slid, nearly causing a serious accident. A running engine provides essential assistance; stalling is equivalent to manual hard braking, drastically reducing control. To this day, I still remember that lesson: always engage first gear when going downhill, use the engine to slow down, and lightly tap the brakes to maintain a steady speed. Safe driving experience teaches us that such risks must be avoided.

[LeHadley]

I'm a new driver, and my instructor always emphasizes not letting the engine stall when going down steep slopes. Engine shutdown cuts off the brake assist system, and after stalling, the brakes may become stiff, making it difficult to slow down in time. During practice, I tried on a gentle slope—even with the brakes fully pressed, the car kept sliding, making control difficult. If the engine stalls unexpectedly, stay calm, brake slowly, and use the remaining air pressure to stabilize the direction. The handbrake can be used in emergencies but may cause loss of control. As a beginner, I'm extra cautious to ensure the engine stays running and use lower gears for auxiliary braking.