In summary, the most efficient steering system should be the electric power steering system (EPS). This is because it performs well in energy efficiency, response speed and driving experience.

Common faults of hydraulic power steering are: 1. Hydraulic oil leakage 2. Hydraulic pump failure 3. Steering power reduction or loss 4. Steering wheel vibration or abnormal noise 5. Steering wheel automatic return failure 6. Steering failure or loss of control

Under normal driving conditions, the life expectancy of a rack and pinion is generally 7 to 10 years, or about 100,000 to 150,000 miles (about 160,000 to 240,000 kilometers). This life expectancy is based on daily commuting, good road conditions, regular maintenance, and normal driving habits.