What causes the entire Audi A6 to shake when braking?
2 Answers
Audi A6 shakes when braking due to uneven wear of the brake discs, the use of inferior brake pads, or the installation of new brake pads. Uneven wear of the brake discs: Shaking during braking is usually caused by uneven wear of the brake discs, such as the outer part being thicker than the inner part or vice versa. When braking, the brake pads clamp the brake disc vertically. If the brake disc is uneven and does not fully contact the brake pads, it will cause shaking. The higher the speed, the more severe the shaking, and the harder it is to stop the car. Use of inferior brake pads or installation of new brake pads: Brake shaking can also be caused by the use of inferior brake pads or occur for a period after installing new brake pads. Inferior brake pads contain more metal, making them harder. When they rub against the metal brake disc, they are prone to resonance, amplifying the vibration and causing shaking. Therefore, after installing new brake pads, it is advisable to drive cautiously for a certain distance and avoid emergency braking.
Last time I drove an Audi A6, I encountered brake shuddering and specifically consulted a senior technician. The main causes are often thermal deformation of the brake discs, especially after uneven cooling following high-speed emergency braking; excessive tire imbalance or slight wheel hub deformation can also transmit vibrations during braking; aging bushings in the suspension system's lower control arms lose their damping effect, causing body resonance when braking; loose steering linkage ball joints can also amplify the shuddering sensation; uneven brake pad material or abnormal wear can also produce pulsating vibrations. It is recommended to first check the flatness of the front and rear brake discs, followed by a tire balance test.
