Two problems related to brake fluid leak have been reported for the 2008 Saturn Aura. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2008 Saturn Aura based on all problems reported for the 2008 Aura.
I had to replace both rear calipers due to leaking brake fluid.
Vehicle: 2008 Saturn Aura xe with 45,000 miles. Problem: total brake failure. The braided brake line segment underneath the master cylinder ruptured allowing the brake fluid to leak all over the engine bay. The steel braid was compromise by what looked like a chemical corrosive. The actual hole was less than one eighth inch in diameter. The blue plastic brake hose ruptured/bubbled like an aneurysm. Total break failure resulted within a few brake pumps. Repair: the car was towed to the gm dealership. The brake lines (2) were repaired under extended warranty. Both lines had several signs of corrosive activity on the steel braid. Conclusion: I was very lucky to not have had an accident.