Basically, this lets your wheel turn and move up and down. It’s a spherical bearing, so it allows for a lot of movement while still keeping everything securely connected. Think of it like your shoulder joint – it’s what gives you a range of motion, but it needs to be strong. The castle nut and cotter pin are how we lock everything tight. The castle nut has slots cut into it, and the cotter pin goes through those slots and a hole in the stud, preventing the nut from loosening. It connects your control arm – that’s the part that holds your wheel assembly – to the steering knuckle, which is what actually steers the wheel. It’s a crucial point where a lot of forces come together – from bumps in the road, steering inputs, and even just the weight of the vehicle. It’s part of what allows the suspension to do its job. If this wears out, you’ll notice a few things. Usually, you’ll get clunking noises, especially when going over bumps. Sometimes it’ll feel loose in the steering. It can cause uneven tire wear, too. If it fails completely, it’s a serious safety issue – you could lose control of the vehicle. It’s a wear item, it will eventually need replacing. We’ve got a pretty good selection of these at Fixparts Online if you're looking. It’s one of those parts you don’t want to skip on, good quality is important here. Safe driving starts here: Ball Joint with Castle Nut and Cotter Pin (MPN ADT38638) has a 12-month warranty!

About Blue Print

Blue Print is a leading provider of precision replacement parts from Germany, ensuring quality and exact fit for various vehicles. Based in Germany, Blue Print emphasizes innovation and superior craftsmanship.

Why Choose Blue Print?

• We offer a huge range of parts for European cars – everything from AdBlue tanks to wheel bearings. • Blue Print parts are made to the same standards as original equipment, so you know they’ll fit and work well. • We’re trusted by garages and car owners across the country for quality and reliability. • You get great value for your money – top quality parts at a competitive price. Blue Print – trusted quality, available at FixParts Online!