Does Applying the Electronic Parking Brake in D Gear Cause Damage?

[LeTanner]

It is possible to apply the electronic parking brake while in D gear. The electronic parking brake is a technology that achieves parking braking through electronic control. Its working principle is the same as that of a mechanical handbrake, both achieving parking control through the friction generated between the brake disc and brake pads. The only difference is that the control method has changed from the previous mechanical handbrake lever to an electronic button. The reasons for brake noise without pressing the brake pedal are as follows: 1. Use of inferior or overly hard brake pads: If inferior or overly hard brake pads are used, they will produce a squeaking noise when rubbing against the brake disc during braking. Therefore, it is essential to use high-quality brake pads when replacing them. 2. Presence of sand or foreign objects between the brake pads and brake disc: During normal driving, it is inevitable to pass through some complex road conditions. Due to the unique design of disc brakes, some sand and foreign objects may get between the brake pads and the brake disc, which can also cause noise during braking.

[MaxFitz]

I've seen many drivers accidentally pull the electronic parking brake while driving, especially when in D gear, which can indeed pose some risks. Modern cars' electronic parking brakes usually have built-in protection mechanisms. When you pull the handbrake while the vehicle is still moving at low speed, such as below 10 km/h, the system will automatically assist in braking to prevent rolling, but it won't immediately lock the transmission. If you pull the handbrake at higher speeds, the electronic parking brake will trigger emergency braking, which may cause sudden deceleration and put extra pressure on the transmission gears. Doing this frequently can accelerate wear or damage to the drivetrain components. Additionally, if you frequently operate the handbrake this way, it may interfere with the vehicle's electronic control system and affect sensor accuracy. Personally, I recommend avoiding developing this habit as it not only harms the car but could also lead to safety hazards. Always shift to P gear before pulling the handbrake when parking—safety first.

[LaAurora]

As a commuter who usually drives an automatic transmission car, I occasionally pull the electronic handbrake in D gear by mistake during traffic jams, but honestly, this is not a smart move. The electronic handbrake is designed for parking. When you pull it while in a driving gear, the car generally won't break down immediately, but the onboard computer will interpret it as an emergency and activate the braking function instantly. That time I tried it at low speed in the city, the car just jerked slightly and stopped without major issues. However, doing this frequently can wear out the brake pads and transmission oil seals, especially if you suddenly brake at high speed, which puts extra strain on the engine. The mechanic told me my car only had minor looseness after inspection. Now I've developed a good habit: when waiting at a red light or parking, I shift to N or P gear before using the electronic handbrake—it protects the car and gives me peace of mind. A friend with a similar experience told me that the manual states most manufacturers don't recommend this operation because it's not as controllable as the old-style handbrake.

[Judah]

I've studied automotive systems, and pulling the electronic parking brake while in Drive (D) definitely poses potential risks, despite modern vehicles having anti-misoperation protection. The electronic parking brake uses a motor to drive the brake calipers, and if activated while the vehicle is moving, the system will attempt to forcibly engage parking, which may overload the transmission. Automatic transmission gears and torque converters are prone to overheating or seal damage when subjected to additional forces, ultimately shortening their lifespan. Especially when operated at high speeds, it's not only dangerous but also likely to trigger ABS anti-lock braking system malfunctions. Vehicle manuals often emphasize using the electronic parking brake only when stationary to avoid such issues. I recommend that car owners regularly inspect their braking systems to ensure proper functioning and, if this situation occurs, immediately slow down to a safe position before addressing it.