Four problems related to service brakes have been reported for the 2008 Subaru Impreza Sti. The most recently reported issues are listed below.
Welds on bracket that holds clutch and brake pedal to firewall failing. Causing clutch pedal inconsistency along with brake pedal movement upon clutch pedal depression.
Firewall spot welds broke, resulting in movement of the brake pedal assembly and clutch assembly. This is causing the clutch to not disengage fully and also making it very difficult to shift due to the flex. As this has the potential to be dangerous and is most definitely a manufacturing defect, it should be subject to a recall.
The firewall is flexing under clutch pedal movement or braking. Upon research I have found numerous claims by 08/09 imprezza owners of soft welds on the firewall cracking and causing the firewall to flex under operation of the brakes or clutch. Further failure of the welds could cause serious accident if braking or clutch operation is further degraded. Subaru of America denies that there are claims to this effect though there is documentation on the internet to the contrary. Issue should cause a recall as it is quite common and a serious safety issue.
On the morning of November 4, 2011 , I pulled into the parking area behind a middle school and my car would not stop. I applied my brakes, the car still continued to go forward over the cement bumper and into the building. The only thing to stop my car was pulling the emergency brake. I went two feet into the middle school building. The airbags did not deploy. The car and the building received extensive damage.
| Service Brakes problems | |
| Brake Squeaking Noise problems | |
| Brake Master Cylinder problems |