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What is the expected lifespan of the front brake discs?


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Hello, I bought a new GLB car over two years ago. During the first service at 5000 miles, I reported a sensation of "kicking" from the brakes. I was informed that there was no issue. Recently, I had the second service at 12000 miles, and while the "kicking" hasn't worsened, I noted it again. The vehicle just had a replacement of its damaged discs and pads, costing £490. Shouldn't this be included in the warranty given the very low mileage? The dealer has informed me that wear and tear is not included in the coverage.
By the way, the dealer is located in Glasgow.

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Discs and pads are considered consumable parts, making it difficult to get them changed under warranty.

Were the discs changed based on the dealer's recommendation or did you notice that they were warped?

For what it's worth, the cost of £490 for authentic discs, pads, sensors, and maybe calliper bolts is still high, but not worth resorting to extreme measures like leaping over the Erskine Bridge.

Typically, the lifespan of front brake pads and discs is about 25,000 kilometres, while the rear brake pads may last up to 40,000 kilometres and the discs up to 80,000 kilometres. However, these figures may vary depending on driving style and use.

Replacing the discs and pads can be a profitable venture for the dealer. Today, I replaced my pads because I was informed by the dealer during the last visit that the rear brakes needed to be replaced. Upon inspection, I found that the rear pads were approximately 60% worn and the discs were more than 50% worn. Given my yearly mileage, I could have continued using them for another five years. However, it is always enjoyable to have a new set of brakes.

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We experienced vibrations when braking, so we changed the front brake discs and brake pads.

There is a reduced amount of trembling now, however there is still some remaining. Do we have any fresh, distorted discs?

The newly manufactured discs are ATE and originate from China.

Who has knowledge?

I have purchased a set of authentic MB discs, but I have not yet installed them.

The rapid depletion of funds!

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It has been suggested that maintaining pressure on the brake pedal during intense braking, such as when exiting a highway, might lead to the brake pads exerting excessive force on a specific area of the brake disc, perhaps resulting in warping.
If the hub-to-disc surface is not properly cleaned and free of rust while replacing the discs, they will not rest evenly on the hub and may get warped. My spouse had this issue many times with a Peugeot 406, and it was only after we took it to a different authorised dealership that the problem was finally rectified.

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The described operation does not physically distort the disc, but it might result in the formation of a residue that leads to vibrations when the brakes are applied later on. These vibrations are often mistakenly attributed to a warped disc.

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