Why are there grooves on one of the brake discs of a car that's been used for five years?

Can the 2003 Bluebird 10-disc CD changer switch discs automatically, or does it require manual changing one by one?

What type of discs does the Mazda 2 use? Doesn't it support MP3?

Is it normal for brake discs to have scratches?

Why do the original tail brake bulbs of the Accent last the longest, but the replacement bulbs don't last as long? They start flickering after just three to five years?

Why are all the used Supras off the market this year?

Hey guys, any recommendations for brake discs and pads for the 2019 model? 😊

I've replaced the brake pads and discs on my Mazda6, and also changed the brake fluid, but the brakes still feel very soft and don't stop well. What could be the issue?

Why are there grooves on one of the brake discs of a car that's been used for five years?

Are there any owners who have been driving a pure electric vehicle for five or six years? Is the battery degradation severe?

I've been driving my RX300 for five years. I'm torn between switching to an electric car or continuing to drive it.