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What Causes Uneven Wear Between Left and Right Brake Discs?

2 Answers

DiMatteo

07/29/25 7:05pm

Uneven wear between left and right brake discs can be attributed to the following reasons: Material Inconsistency: The rate of wear is primarily related to the material of the brake discs and brake pads. Therefore, uneven material composition of the brake pads could be a contributing factor. Force Imbalance: Frequent braking during turns can lead to an imbalance in the forces applied to the left and right wheels, resulting in uneven wear. Additionally, the right brake disc may become deformed. Inconsistent Caliper Retraction: If the brake calipers do not retract uniformly—for example, due to dirt on one side's retraction bolt or significant differences in the length of the left and right brake fluid lines—this can cause uneven wear. Outer Pad Failing to Disengage: The telescopic rods are sealed with rubber sleeves. However, if water enters or lubrication is insufficient, the rods may not move freely, preventing the outer brake pads from disengaging from the brake discs after braking. This leads to additional wear on the pads. Additionally, inconsistent braking times between the left and right brakes can contribute to uneven wear.

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StMaci

08/14/25 1:11pm

Seeing uneven wear on your car's left and right brake discs is quite common, let me analyze the possible root causes. As someone who frequently repairs cars, I've found the main reasons include issues with the brake calipers: if one side's caliper is stuck due to dust or rust, the piston won't move smoothly, causing faster wear on that side's brake pads and disc. Uneven distribution of brake fluid is another factor, especially when there are air bubbles or leaks in the system - insufficient pressure will weaken braking on one side. Suspension system problems are also critical, such as when aging springs cause the car to tilt, putting more force on one side during turns and increasing brake wear. Inconsistent tire pressure also affects force distribution. I recommend regularly checking if the calipers move freely, cleaning brake components, and promptly visiting a repair shop to inspect the hydraulic system. Ignoring this issue can affect braking performance, increasing the risk of veering while driving, so decisive action is needed to ensure safety.

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