How Long is the Warranty for Brake Discs under the Three Guarantees?
2 Answers
The warranty period for brake discs under the Three Guarantees is generally 12 months or 60,000 kilometers, though some manufacturers offer 3 years or 100,000 kilometers. The specific duration can be found in the vehicle maintenance manual. Brake discs should be inspected every 60,000 kilometers. Here are methods to determine if brake discs need replacement: 1. **Unusual Noises During Braking**: If there is a high-pitched metal-on-metal scraping sound when lightly applying the brakes, it may indicate an issue. First, rule out normal wear noises from new brake pads (some new vehicles may produce occasional friction sounds under normal installation and usage). If the noise is due to scratches or damage on the brake disc, immediate replacement is recommended. 2. **Dashboard Warning Light**: Many vehicles have a brake disc/pad warning light. If the light illuminates due to excessive wear or malfunction, the braking efficiency is compromised, posing a safety risk. The light turns off after repairs. 3. **Measuring Brake Disc Thickness (Most Reliable Method)**: Use a micrometer to measure the remaining thickness. Replace the brake disc if the total wear on both sides reaches 3mm. 4. **Dynamic Balancing**: Brake discs require precise balancing. If a collision damages or deforms the disc, it can cause vibrations in the brake pedal or vehicle body, leading to poor braking performance.
I bought a new car last year, and within less than a year, I noticed a squeaking sound when braking. After taking it to the 4S store for inspection, they found that the brake discs were worn out. I thought the warranty should cover it, but they told me the warranty period is usually 6 months or 10,000 kilometers, whichever comes first. However, brake discs are considered wear-and-tear parts, so their warranty is much shorter than that of the engine. Many brands have similar policies because frequent use makes them prone to wear and tear. My car had just passed the warranty period, so I had to pay out of pocket for the replacement, which cost me nearly a thousand yuan. My advice is to ask about warranty details when buying a car and have the mechanic check the brake condition during regular maintenance. Regularly cleaning the dust from the wheel hubs can also help slow down wear. Otherwise, brake failure at high speeds is extremely dangerous. In short, warranty policies vary, so check the manufacturer's manual to avoid ending up like me.
