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What Causes Uneven Brake Pad Wear?

2 Answers

DiJosephine

07/29/25 6:56pm

The reasons for uneven brake pad wear (one thick and one thin) are: 1. Insufficient single-side braking or single-side dragging; 2. Imbalanced force distribution between left and right wheels, inconsistent brake caliper return; 3. Unequal length of brake fluid lines. Brake pads work by utilizing friction between the brake pads and brake drum, as well as between tires and the ground, converting the vehicle's kinetic energy into heat energy through friction to stop the vehicle. Brake pad replacement method: 1. Open the engine compartment to check brake fluid level height to prevent overflow during replacement; 2. Remove the wheel where the brake is located; 3. Remove the brake caliper bolts and take out the brake pads; 4. Install new brake pads, tighten the guide bolts, and complete the replacement.

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RoseAnn

08/14/25 12:45pm

I remember my car's brake pads once had uneven wear—one thick and one thin, which really scared me! The mechanic later explained that the caliper piston was stuck, unable to distribute force evenly, causing the thinner pad to wear more. This was likely due to rusted or insufficiently lubricated guide pins, preventing the piston from retracting properly. Additionally, warped or uneven brake rotors can accelerate this uneven wear. My driving habits sometimes involve heavy braking, and I neglected regular inspections. It's recommended to service the brake system every 5,000 km or six months, cleaning and lubricating the guide pins to avoid misalignment risks. Safety comes first—addressing issues early is always better than waiting for an emergency. Don’t skimp on thorough inspections; investing in high-quality parts now beats regret later.

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