One problem related to brakes failed has been reported for the 2014 Infiniti Q50. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2014 Infiniti Q50 based on all problems reported for the 2014 Q50.
My Infiniti Q50 2014 has intermittent brake booster pump failure that causes diminished braking power at all speeds and at a slips at a stop. The diminished braking affects stopping distances and triggers emergency collision warnings and impact mitigation like seat belt tightening while driving. The condition has happened for the last 24 months. Infiniti refused to address until they witnessed the condition. In late 2016 I was able to show them when it was happening. Their tech diagnosed the brake booster as the issue and repaired. In may 2017 the conditions are now repeating. Infiniti again is refusing to address unless they can witness. The car braking is unsafe with this condition, particularly as you have no ability to know when the intermittent condition will occur. I have email trails of all reports each one it happened and service communications with the dealership.