The electric power steering column and universal joint assembly of the car are broken.
When the electric power steering column and universal joint assembly of the car malfunction, it will directly affect the vehicle's handling and safety. According to the latest publicly available information (as of April 2026), the following are key information summaries:
Common Fault Symptoms
Steering Abnormalities:
The steering wheel becomes heavy and difficult to turn
The vehicle automatically veers when driving straight
The free travel increases (the steering wheel shakes but the wheels do not respond)
Oversteering or understeering
Strange Sounds and Jolts:
Creaking or grinding sounds (like "clicking" or "grinding") when turning the steering wheel at rest or at low speed (≤ 20 km/h)
The steering wheel shakes or vibrates noticeably when turning
System Warning:
The EPS (Electric Power Steering) fault indicator light on the dashboard is constantly on or flashing
Loose or Failed Connections:
The connection between the steering column and the steering gear is loose
The steering wheel is difficult to return or has abnormal return force
Can it be repaired?
Depends on the extent of damage:
Repairable Conditions (Applicable for Minor Damage):
Loose connection parts → Re-tightening
Light wear of bearings/sleeves → Replacement of corresponding components
Insufficient lubrication → Adding special lubricating grease
To be Replaced Assembly (Applicable for Severe Damage):
Deformed or broken steering column
Severe fatigue and peeling of the universal joint cross shaft or needle roller
Severe wear of the internal transmission structure
Note: The steering system is related to driving safety. Even minor faults should be repaired as soon as possible to avoid sudden failure.
Suggested Handling Steps
Stop immediately for inspection: If there is steering heaviness, strange sounds, or veering, stop the vehicle as soon as possible and avoid continuing to drive.
Contact Professional Repair Facility:
It is recommended to go to a 4S store or a reputable repair shop with steering system diagnosis capabilities
You can use PCCar.com or Youjia to search for nearby certified service providers
Diagnostic Priority: Read the EPS fault codes (such as DTC22) through professional equipment and combine physical inspection to determine if it is a sensor, motor, or mechanical part failure .
Based on the Repair Plan to Decide:
If the quote is close to or exceeds the market price of the assembly (for ordinary vehicles, it is approximately 800–1200 yuan), it is recommended to directly replace the new assembly .
If within the warranty period (new cars usually have a 3-year or 100,000-kilometer warranty), a free replacement can be applied for .
Prevention and Maintenance Tips
Regularly check if the steering column is rusty, noisy, or loose
Avoid turning the steering wheel for a long time (especially when the engine is cold)
After washing the car, pay attention to cleaning the water accumulation around the steering column to prevent rust If you need to further determine the specific repair plan for a particular vehicle model, please provide the brand, model and year, so that we can match more accurate parts and labor cost information.
The automotive electric power steering column and universal joint assembly is a key mechanical component in the electric power steering system (EPS), primarily responsible for transmitting the driver's steering intention, providing assistance, adjusting the position, and ensuring collision safety. Its working principle can be summarized as a "perception - decision - execution" closed-loop control, combined with mechanical structure to achieve functions.
Core working principle
Torque perception: When the driver turns the steering wheel, the torsion bar inside the steering column undergoes a slight torsion, and the torque sensor detects the relative rotation angle between the input shaft and the output shaft, converting it into an electrical signal and sending it to the electronic control unit (ECU).
Vehicle speed and status input: The vehicle speed sensor provides real-time feedback of vehicle speed information. The ECU combines the torque and vehicle speed signals, according to the preset algorithm, calculates the required assist magnitude and direction.
Assist execution: The ECU drives the assist motor (usually a permanent magnet brushless motor), the motor amplifies the torque through the worm gear reduction mechanism, and acts on the output shaft or input shaft of the steering column, assisting the steering.
Universal joint function: The universal joint connects the steering column and the steering gear (such as a gear rack mechanism), ensuring the transmission of steering torque while compensating for installation angle deviations, adapting to body structure deformation or adjustment requirements.
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