Daihatsu Copen: Powered Active Top retractable hardtop fails to cycle (motor/hydraulic wear, water ingress)

The LA400K keeps a powered two-piece aluminium retractable hardtop that a hydraulic pump and linkage set folds into the boot in about 20 seconds at the press of a switch between the seats. As these cars age past their first decade the pump weakens and the roof cycles slowly or stalls part-way, and the boot area where the roof motors and rams live is prone to water ingress that corrodes connectors and microswitches. Owner communities consistently report roof-not-opening faults, blinking warning indicators and interlock issues (for example a poor handbrake or boot-latch switch contact halting the sequence). A stuck roof is the single biggest ownership variable on any Copen, and JDM parts scarcity in NZ pushes replacement pump/actuator costs up.

• Roof stalls or stops part-way through the open/close cycle
• Roof will not start moving when the switch is pressed
• Warning light or roof indicator flashing / error state
• Slow or laboured roof operation, unusual motor whine
• Standing water or damp carpet in the boot / roof storage well

Cycle the roof fully open and closed several times on level ground with the handbrake on, watching for hesitation, stalling or excessive noise. Lift the boot carpet and check for water, corrosion or damp around the roof motors, pump and connectors, and confirm the emergency manual-close tool is present.

$350 to $2,600 at New Zealand independent workshop rates. That is for this job on its own, not for the car.

An estimate, in NZD, for the repair as normally carried out. What a specific car costs depends on which part has failed and what it damaged on the way — treat this as the floor for a negotiation, not a quote.

• “Does the roof open and close fully every time without stalling?”
• “Has the roof pump, motor, rams or any microswitch ever been repaired or replaced?”
• “Is there any history of water getting into the boot or roof storage area?”
• “Is the emergency manual roof-closing tool still in the car?”

The failure described above is documented in published sources — owner forums, technical service bulletins, recall notices and workshop write-ups — held in our fault database. The inspection instructions and the cost estimate are KickTyres’ own interpretation of them, and it is a starting point for an inspection rather than a manufacturer statement.