The original gangway connection were easily prone to damage and were hence replaced by a newer design similar to that on the C341.

In 2009, the some seats were modified from transverse to longitudinal arrangements to increase the capacity of the C321.

In 2014, the LED train information displays were updated to full-colour LED displays.
The original gangway connection were easily prone to damage and were hence replaced by a newer design similar to that on the C341.
In 2009, the some seats were modified from transverse to longitudinal arrangements to increase the capacity of the C321.
In 2014, the LED train information displays were updated to full-colour LED displays.
Taipei Metro C321