* Worn or damaged suspension components: Even minor wear in bushings (control arm bushings, sway bar bushings, strut mounts), ball joints, or tie rod ends can cause a vague, wandering feel. A visual inspection might not reveal significant damage, but subtle play can still affect steering. These components are wear items and should be checked thoroughly, even if visually they look acceptable.
* Uneven tire pressure: Simply having slightly different tire pressures across the four tires can contribute to wander. Check and inflate all tires to the manufacturer's recommended pressure (found on a sticker usually on the driver's side doorjamb or in the owner's manual).
* Tire wear and condition: Uneven tire wear (cupping, feathering) can also cause wandering. Inspect the tires carefully for any unusual wear patterns. Tires with low tread depth, or those nearing the end of their life, contribute to a less precise steering feel.
* Steering linkage: There might be minor play in the steering linkage somewhere that's not easily detected without specialized tools and a thorough examination.
* Alignment issues: Although your mechanic said the alignment was okay, it's possible a subtle misalignment exists, especially if the toe isn't perfectly set. A slight toe-out or toe-in can cause wandering.
* Power steering fluid: Low or dirty power steering fluid can affect steering feel and responsiveness. Check the fluid level and condition. A slightly sluggish system might contribute to wander.
* Wheel balancing: While this usually causes vibration, imbalanced wheels can also contribute to a slightly imprecise steering feel and subtle wander.
What to do:
1. Return to the repair shop: Explain your concerns in detail, emphasizing the persistent wandering even if slight. Ask them to specifically check the components listed above, even if they visually appear okay. Push for a more thorough inspection, especially of the suspension and steering components.
2. Get a second opinion: Take your car to another reputable mechanic for a second opinion. A fresh set of eyes might spot something missed in the first inspection.
3. Document everything: Keep records of the inspections and repairs, including any notes from the mechanics. This will be helpful if the problem persists.
It's frustrating when a problem isn't easily diagnosed, but persistent wandering, even if minor, is a safety concern. It's important to resolve it for a safe and comfortable driving experience.
