How long does it take to change the heater core on an Audi a3?

Replacing the heater core on an Audi A3 typically takes about 4 to 8 hours, depending on the model year and the technician's experience. The process is labor-intensive, as it often requires disassembling parts of the dashboard and the HVAC system. It's advisable to consult a professional for this task to ensure it's done correctly and safely.