What are the reasons for the power steering failure in BMW 3 Series?
2 Answers
Here are the specific reasons for the power steering failure in BMW 3 Series: 1. Dirty power steering fluid: The power steering fluid acts as a force transmission medium. If the fluid is dirty, it can cause poor circulation, making steering difficult. In severe cases, the power steering pump may also produce abnormal noises. 2. Insufficient or leaking power steering fluid: Insufficient power steering fluid means reduced power assistance. Check the related systems for any signs of fluid leakage. Focus on inspecting the power steering fluid reservoir, power steering hoses, and steering gear. 3. Loose or overly tight power steering belt: Alternatively, the belt may be worn out. The tension can be adjusted, but a worn-out belt must be replaced.
Having repaired many BMW 3 Series, I've found that the most common cause of power steering failure is issues with the power steering pump, such as internal component wear leading to insufficient pressure, or aging seals causing oil leaks. Insufficient or contaminated fluid can also strain the system, so it's important to regularly check the fluid level and color. For electronic versions, control module or sensor failures are the majority, sometimes false alarms caused by poor wiring connections. The steering system bears heavy loads, and prolonged driving accelerates wear, so regular maintenance is recommended to nip problems in the bud. If a failure occurs, the steering wheel will become heavy, making turning difficult and affecting safety—pull over immediately to troubleshoot or go to a professional shop. Don't delay, as minor issues can turn into major repairs, costing money and risking safety.
