If some are rusty or need replacement, now is the time.
The game is in trouble and it needs replacements, all right.
The church needed replacement by the end of the seventeenth century.
That church lasted over 100 years before it needed replacement.
The third, a wood frame structure, needed replacement by 1832.
More often, however, the heads do not need replacement, but are just dirty.
Strings may need replacement every two or three months with frequent use.
On the other hand, the pen itself is ready to go immediately into the field, and the batteries never need replacement.
The other was the sole kidney, and that needed replacement.
Wine people break a lot of glasses and always need replacements.