You really roll the dice with that choice. A pair of used axels with the boots intact are a much better choice usually. Add a little more lubricant to them. Put them on the oposite sides to what they were installed on in the donar car.

You are then probably looking at a long time frame of use. Or if you must replace with chinese for some reason. Take the axel that is still good on your car and install the new chinese wonder on where it was and put the remaining good one in the position of the failed unit.

There is no reason to change them both anyways if only one is bad. There is more than an even chance that your current still good one will outlast any chinese replacement. Almost gauranteed to if you add a little more lubriant when you have it off to install on the otherside. You need used axels or just one with still sound uncracked boots though.

If you get some of the worse of the chinese axels they could be very hard to install or may last only a matter of weeks. It is too bad things are as they are. There is no consistancy with those axels. Some last for quite awhile and others just randomly fail with no way of predicting what you buy will do.

This is the kind of product that gives china a bad reputation for parts. I have stopped installing any chinese front wheel drive bearing assemblies. Far too many of them were noisy in less than a month. They were designed for a selling price point not as a usable product basically.