Why is there a squeaking noise when turning the steering wheel to full lock?

[Malcolm]

Steering wheel squeaking noise when turning to full lock is caused by friction between plastic components, friction between the steering column and floor mats, failure of the clock spring inside the steering wheel, or leaking of the steering gear dust cover. Below are detailed explanations: Friction between plastic components: The steering wheel consists of various plastic parts. When turning, if the gaps between these parts are too small, friction will occur. This usually resolves after some break-in period. Friction between steering column and floor mats: This is mainly caused by oversized aftermarket floor mats that come into direct contact with the steering column. Adjusting the position of the mats or replacing them can solve this issue. Failure of the clock spring inside steering wheel: This could be due to a broken clock spring or loose clock spring connector. Replacing or securing it should fix the problem. Leaking steering gear dust cover: Replacing the dust cover or reapplying grease can resolve this issue.

[Angel]

I've been driving for ten years and have encountered the situation where the steering wheel makes a hissing sound when turned to the full lock position several times. The first time it happened, it startled me, and I thought it was some major issue, but it turned out to be a lack of oil in the power steering pump. This noise sounds like a fine friction sound, especially when making low-speed turns or parking, persisting after turning the wheel to full lock. There are many common causes, such as low or dirty power steering fluid, aging or loose belts, dry and unlubricated ball joint connections, or even wear and tear of internal components in the steering gear. In my case, adding some power steering fluid reduced the noise, but it's best not to ignore it. If the steering becomes particularly heavy or the noise gets louder, it's advisable to visit a repair shop promptly to avoid complete failure of the steering system affecting safety. Regularly checking the power steering fluid level, taking a quick look every month, can help reduce the occurrence of faults. I suspect your issue might also be related to the fluid, but other component failures can't be ruled out. In any case, getting it fixed sooner is more prudent.

[HazelLee]

From a fault perspective, the squeaking sound when the steering wheel is turned to the limit is usually related to the power assist system. When the power steering pump has insufficient pressure, internal operation becomes uneven, producing friction noise; it could also be due to loose or slipping belts, or aging and cracking; lack of lubrication in the steering column universal joint can also cause squeaking; if the power steering fluid is leaking or severely contaminated, the noise becomes more pronounced. I recommend first checking the fluid level in the power steering reservoir—top it up if the dipstick shows it's low, or replace the fluid if it's dirty. Next, identify the source of the sound—if it's coming from the belt area, check the tension or replace the belt. If the issue persists, a professional technician should inspect the internal components of the steering system with specialized tools. Regular maintenance, such as applying lubricant to the joints, can extend the lifespan of these components. Ignoring such noises long-term may lead to complete failure of the power assist system, resulting in higher repair costs. Addressing it early saves money and ensures peace of mind.

[DaisyDella]

A squeaking sound when turning the steering wheel to full lock is a common warning sign—never ignore it! I experienced this once: sudden heavy steering accompanied by noise while driving, which really startled me. Common causes include low or dirty power steering fluid leading to insufficient lubrication, worn steering gear components, or belt issues. More severe cases like steering column deformation pose greater risks. For safety, immediately reduce speed and inspect upon hearing such noises, avoiding prolonged full-lock turns. If the sound persists, refrain from forced driving—find a safe spot to check fluid levels or contact a mechanic. I recommend regular power steering fluid changes (every 20,000 km during maintenance) to prevent this issue. Always operate the steering wheel gently to protect the system.

[BraydenRose]

Steering wheel squealing when turned to the limit is often caused by neglected maintenance. I believe the causes usually stem from insufficient or deteriorated power steering fluid, reducing lubrication and causing dry friction in the pump; loose belts that easily slip and screech; lack of maintenance in steering knuckles or ball joints leading to increased friction from dust buildup; or in older vehicles, aging seals causing oil leaks. For prevention, I check the power steering fluid level weekly, keeping it at the mid-mark; change the fluid every six months; avoid turning the wheel to the limit when parked to reduce system stress. If there's unusual noise, try adding some fluid first—if the noise persists, take it to a repair shop for inspection immediately to avoid major repairs. Simple maintenance habits can save a lot of trouble.