The convenience of buying auto parts online is undeniable, but there are pitfalls associated with purchasing from unknown sellers via the web. Online auction sites, in particular, are often home to questionable web hub assemblies, bearings and similar parts. These parts may be misrepresented in terms of quality, even if photos of the items indicate the parts are in pristine condition. Also, you may have trouble processing returns in the event you’re dissatisfied. To avoid problems with quality and customer service, source wheel hub assemblies from a trusted supplier with a reputation for excellence, online and off.