If your turn indicators need replacing, it is possible on some models to replace a particular part separately. If these parts are available, they are listed in the "replacement parts" tab.
The supply of replacement parts is minimal, partly because of this, most customers choose to replace the complete unit, and for some models you have a choice of qualities. A quality is the closest to the original quality, which is not the case with B quality. The materials used and the finish are not best of class with quality B, but again the price is lower.
If you only want to install the best, you should choose quality A. If the budget doesn't allow it and it doesn't matter that the finish and life span are not comparable to the original, you can consider buying the B quality.
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