Symptoms
- Frequent small steering corrections needed to stay in the lane
- Doesn't pull hard to one side, just feels vague
- Worse at highway speed than around town
Likely causes
- CommonWorn suspension bushingsSoft or worn bushings let suspension components shift slightly, reducing directional stability.
- CommonAlignment out of specIncorrect toe or caster settings can cause wandering rather than a firm pull.
- PossibleUneven or low tire pressureTires that aren't matched in pressure can make the car feel less stable at speed.
- PossibleWorn steering componentsPlay anywhere in the steering system reduces precision at highway speed.
What to do
- Check and correct tire pressure on all four tires first.
- Test on a flat, calm-wind day to rule out crosswinds affecting your perception.
- Have the alignment checked, focusing on caster and toe settings which affect stability.
- Ask the shop to check suspension bushings and steering linkage for play while doing the alignment.
- Replace any worn bushings or linkage components found, then recheck the alignment.
Tools and parts
- Tire pressure gauge
Control arm bushingSearch: “control arm bushing for [your car model]”
When to call a pro
An alignment shop can check caster and toe settings, which affect straight-line stability more than most people expect, and inspect bushings at the same time.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.