Why does the Elantra make abnormal noise and shake when braking in D gear?
2 Answers
Abnormal noise and shaking when braking in D gear on the Elantra may be caused by excessive carbon deposits in the engine or a mismatch between the engine oil quality and the engine. Specific reasons: Excessive carbon deposits in the engine. This situation mainly occurs when gasoline is not fully absorbed into the engine, leading to the formation of carbon deposits, which causes the car to shake and increases fuel consumption. Once the engine oil viscosity is too high, it can lead to increased fuel consumption and carbon deposit formation. Solutions: Check the car's spark plugs. If a certain cylinder's spark plug cannot ignite normally, it will cause the engine to run unevenly. At this time, the vibration at idle speed will be very noticeable, and it will also be accompanied by a decrease in power. You can go to a 4S shop to find relevant professionals for maintenance.
I previously drove an Elantra, and it was quite common to experience strange noises and shaking when braking in D gear. This is likely related to the aging of the engine's mounting bracket. The clunking sound combined with slight car shaking initially made me think it was a brake issue, but later inspection revealed the engine mount was cracked, causing vibrations to directly transmit into the cabin. Spark plug carbon buildup can also cause unstable idling, and when braking, the increased engine load makes shaking more noticeable. I recommend checking the spark plugs first—if they're blackened, replace them. Cleaning the throttle body can also help reduce idle shaking. Don’t neglect overall maintenance; inspect suspension and brake components every six months to avoid major issues. If you can’t handle it yourself, take it to a repair shop to check the engine mounts—replacing them should restore quiet operation.
