0A5311123B Audi ROLLBEARIN

These bearings basically allow for smooth, controlled movement between parts. Think of it like this—instead of two metal surfaces grinding directly against each other, the roller bearing sits between them and lets them roll. It’s a series of little cylinders, or “rollers,” inside a race, and that whole assembly does the work of reducing friction. It handles both radial loads—weight pushing down—and axial loads—forces along the axis. Now, in your suspension, this particular bearing is typically found inside the ball joint. The ball joint connects your control arm to the steering knuckle, allowing the wheel to move up and down with bumps and also steer. That bearing inside lets the ball joint swivel smoothly. It's a small part, but critical to making that movement happen without binding or jerking. It handles a lot of stress from road impacts and steering forces. If this bearing goes bad, you’ll notice if it’s a front end one pretty quickly—you’ll likely feel play in the steering, or hear clunking noises over bumps. It’ll affect your wheel alignment too, and that will cause uneven tire wear. A failed roller bearing inside a ball joint doesn't necessarily cause a catastrophic failure immediately, but it will steadily get worse and eventually lead to bigger problems, potentially affecting your control of the vehicle. Replacing it is preventative maintenance, really. You can find these parts readily available; Fixparts Online carries a good selection. It’s definitely something you want to address when you find out it’s failing, rather than letting it get to the point where other parts get damaged. Highly recommended: Roller Bearing (MPN 0A5311123B) comes with a 12-month warranty!

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