The Polo R WRC has suffered from problems with the handbrake since the car's debut in Monte Carlo.
The issues with the pneumatic system, which were more pronounced in changeable conditions, have been sorted by introducing a hydraulic system to the car.
Andreas Mikkelsen's third factory VW ran with the new system in South America.
Ogier went off the road and out of the lead on Rally Argentina when the handbrake did not work at a crucial point. He eventually finished second to Sebastien Loeb.
Ogier's team-mate Jari-Matti Latvala said: "The handbrake is sorted. We will all have the hydraulic handbrake and this is a step forward.
"Citroen has been using the hydraulic handbrake, so for me it should be the best one."