Fence top corners rotted

[Sonic70]

On a lot of my dads fence panels the top corners have rotted as you can see in the image below. What is the best solution to this, splice a new piece in or replace the whole cross member?
Obviously will replace the cap peice.

 

[freddiemercurystwin]

Splice some timber or patch it up as you wish if you like but the panels are nearing the end of their life.

 

[Sonic70]

The rest of the panels are showing no signs of rot it's just at the corners. That's why I was thinking of repair rather than replace.

 

[foxhole]

Looks like there is plant life against fence which will prevent wind keeping the fence dry and avoid rot.
I would remove panel to make repair easier .

 

[big-all]

i repair all my lap larch panels and some are now 35 years old repairing with 2x1 tile batons chamfered for caps [so 3x thicker and stronger than provided]and 19x38mm for others

now here is the point it saves the planet but you need to keep replacing full lengths as you cant just splice in a bit in you also need the tools and its generally cheaper to buy a new panel as every removed timber requires an oscillating saw through every nail so blades and timber
and a points off note whilst timber is metric panels are imperial so your replacement timber for 1830mm panel has to be a 2.1m or to get 2 from 1 3.9m

as said remove and have a look