broken-down

adjectives

in deplorable condition
"a street of bedraggled tenements"; "a broken-down fence"; "a ramshackle old pier"; "a tumble-down shack"
bedraggled, broken-down, derelict, dilapidated, ramshackle, tatterdemalion, tumble-down
not in working order
"had to push the broken-down car"; "a broken-down tractor fit only for children to play on"
broken-down
is similar to
not ready for service
"unserviceable equipment may be replaced"
unserviceable