Is it normal for the steering column of a car to get rusty?
The slight rust on the steering column is a normal phenomenon, but severe rust requires maintenance. The common causes are as follows: The steering column mostly adopts phosphating treatment instead of galvanization, and it tends to rust over time. This is more common in mid-range and low-end models.
Safety impact: Slight rust will not continue to corrode in a dry interior environment and will not affect the normal operation of the steering system.
Treatment suggestions: For slight rust, use rust remover and apply anti-rust agent. If the rust seriously affects usage, it is necessary to have it inspected and repaired at a professional repair station.
Special circumstances: Water-soaked vehicles, long-term erosion by liquids, or humid environments in the south may accelerate rusting. Special attention should be paid to these cases.
The core function of the steering column is to serve as the mechanical transmission hub of the steering system, accurately transmitting the driver's steering torque and intention to the steering gear, thereby controlling the vehicle's wheel steering.
Specific functions are as follows:
Power transmission: Connects the steering wheel to the steering gear, through gears, racks or hydraulic/electric auxiliary mechanisms, to achieve effective transmission of steering force.
Position adjustment: Supports three-dimensional adjustment of height, angle and extension (front and rear), adapting to different body types of drivers, and optimizing the driving view and operation comfort.
Collision energy absorption safety protection: Adopting a collapsible design, it absorbs impact energy during a severe collision through structural deformation, reducing the risk of secondary injury to the driver's chest.
Anti-theft and locking: Integrates electronic or mechanical locking modules, locking the steering column after the engine is turned off, preventing unauthorized rotation.
Signal integration (for some models only): Carries electronic components such as steering angle sensors and control modules, providing input signals for ESP, line-controlled steering, etc. (Note: As of July 2026, regulations have allowed the removal of purely mechanical connections, but many mass-produced vehicles still retain physical steering columns).
Tips: Ensure that the adjustment is locked in place during daily use; if there are abnormal sounds, sticking or excessive free travel, it is necessary to have it inspected and repaired immediately to avoid control failure or safety hazards.
Core conclusion: Steering column failure is a high-risk safety hazard. If there is an abnormality, it should be stopped immediately for maintenance. Driving with a faulty vehicle is strictly prohibited.
Typical symptoms (any one of the following should raise suspicion):
Control abnormality: Heavy steering, difficult return, excessive free travel, vehicle veering without reason or decreased steering accuracy.
Abnormal noise and vibration: A "clicking/creaking" sound when turning the wheel (especially at large angles or on bumpy roads), and irregular shaking of the steering wheel during driving.
Locking failure: The steering column cannot be locked after the engine is turned off, or it locks when starting (key cannot be turned, one-button start has no response).
Instrument alarm: The EPS/steering fault light is on, or some models indicate "ESP stops operating" or steering angle sensor failure.
Common causes
Mechanical type: Internal bearings/gears wear, rusted and stuck, universal joint loosening, deformation of the collapse mechanism (more likely to occur after a collision).
Electrical type: Failure of the electronic steering lock (ESL) motor, aging of the wiring causing short circuits, loss of signal from the steering angle sensor, low voltage causing unlocking failure.
External factors: Incorrect front wheel alignment, abnormal tire pressure, accelerated corrosion in a humid environment, assembly errors caused by non-professional maintenance.
Handling suggestions
Emergency Unlock (Applicable only in locked scenarios)
Mechanical Key Vehicle: Apply the brake + Gently shake the steering wheel left and right + Rotate the key simultaneously.
One-Key Start Model: Confirm the gear is in P position, try repeatedly pressing the start button while slightly turning the steering wheel; if ineffective, do not force the operation, contact rescue.
Professional Diagnosis Must-Do Items
Use OBD to read fault codes (focus on checking ESL, EPS, and SAS modules);
Check fuses, power supply voltage, and plug contact status;
Examine mechanical wear/rust/deformation under the lift (Do not merely rely on lubrication to cover up severe wear).
Maintenance Principles
Insufficient lubrication can be supplemented with special grease; damaged bearings need to be replaced with the corresponding model (e.g., SKF BR930204 for Citroën C4L);
Structural deformation, electronic module failure, severe rust → Must replace the assembly, and perform steering angle zero calibration + four-wheel alignment;
For防盗 matching (Audi/BMW/Land Rover， etc.)， require original equipment programming； aftermarket parts may lead to functional failure.
Notes for Attention
Safety Red Line: Before disassembling or assembling, make sure to disconnect the negative terminal of the battery and wait for 15 minutes. When operating the airbag module, mark the direction and ensure that the torque is tightened according to the standard (for example, the steering wheel nut is usually 22N·m).
Note: In the 2026 new model electric vehicles, the line control steering system is more integrated, and the fault logic is more complex. It must be handled by the brand's authorized center. Regularly check the lubrication and clearance of the steering system every 30,000 kilometers.
If you want to know more, keep reading the other articles on this site!
Please call us if you need such products.
Zhuo Meng Shanghai Auto Co., Ltd. is committed to selling MG&MAXUS auto parts welcome to buy.
