The principal components that are likely to wear and suffer long term damage are the selector forks.
When rebuilding the gearbox assembly however, where possible, replace as many parts as possible, including this item, for a cleaner, sharper gearchange.
Other related gear selector components you may wish to consider:
221B0645
221AA0645
130911334
130911656
130911834
131401196
131401197
131401198
132391163
132391184
140141059
490471055
920021778
92042020
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