I was skeptical at first. After installation, the noise stopped. After a few kilometers the same noise again. In summary, I thought the new bearing had already failed. Not so, the other bearing is defective. After speaking to certified mechanics, I found out what could be happening. Especially after just driving 5,000 miles cross country in a 15 year old car. Machine finishing, light protective oil coating, packaging, fit and so far the service life is excellent. The delivery was slow, probably