The 4-wheel independent suspension inherits its inverted-strut technology from the Impreza WRC competition car. Aluminum front suspension lower control arms and aluminum rear suspension lateral links reduce unsprung vehicle weight. A quick-ratio steering system yields 2.6 turns lock-to-lock, and the steering rack uses a "cannon mount" for greater rigidity that improves on-center response.


The powerful Brembo Performance Brake System employs front discs measuring 12.7 inches in diameter and 1.2-inch thick and utilizing 4-piston, fixed-position calipers. The rear discs are 12.3 inches in diameter and 0.8-inch thick and use 2-piston, fixed-position calipers. A combination of Electronic Brake-force Distribution (EBD) and the Super Sport Anti-lock Braking System (ABS) helps to reduce stopping distances and understeer compared to conventional ABS systems. EBD provides precise control of braking pressure between the front and rear wheels based on the vehicle load to improve stability and stopping distances. Super Sport ABS, using input from a lateral-g sensor, can control the braking forces at each rear wheel independently, optimizing the braking ability during hard cornering to help reduce understeer.


All Impreza, WRX and WRX STI models are equipped as standard with the Subaru Advanced Frontal Air bag system and front seat head/chest side impact air bags (SRS). The driver's side air bag deploys according to the driver's proximity to the steering wheel, as measured by a sensor on the seat track. In the passenger side front seat, a sensor module detects weight on the passenger seat - first determining if it's occupied, and if so by a child or adult - to control air bag deployment.

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