Perfect fit. For those considering replacing the rear shock absorbers (shock absorbers) on their Mazda 3: make sure to replace them when making the shock absorbers you need for each side. I learned my lesson after replacing the shock absorbers on my daughter's car and it knocked after a few miles. Saw and found the original was cut in half. Bought 2 new ones and haven't had any problems since. I'm not sure what they're made of, but it makes sense to replace them with new ones.