If they corrode its usually in the centre hole bit, so you have to remove the radius arm to check. The problem I had was after spinning, the wheel was turned with the rear part sticking out and got caught on a heavy post in the road while going backwards, this pulled the middle of the radius arm mount towards the front of the car.

This was my first car and it was only about 6 years old at the time.

Will be checking after 1000 km to see what where is like. Thanks Ride-on. I'll let you know how it goes