One problem related to brake master cylinder has been reported for the 2004 Infiniti QX56. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Infiniti QX56 based on all problems reported for the 2004 QX56.
The contact owns a 2004 Infiniti Qx56. The contact stated that the brakes pulsated and made an abnormal grinding noise. The check engine and abs warning indicators illuminated. The vehicle was taken to an independent mechanic where it was diagnosed that the brakes functioned normally. The brake master cylinder was replaced, but the failure recurred. The manufacturer was not notified of the failure. The failure mileage was approximately 68,000.