Short answer: alignment is a real service that is also routinely offered on schedule, and both of those things are true at once. The way to tell which you are being offered is to look for objective evidence rather than a recommendation. The three strongest tells are a steering wheel that sits crooked while you drive straight, a steady drift that makes you correct constantly, and wear concentrated on one edge of a tire. And the single most useful thing you can do is ask for the before-and-after printout, because an alignment machine measures your car against the manufacturer’s specification and prints the numbers.
What alignment actually adjusts
Alignment sets the angles at which your wheels meet the road relative to each other and to the car.
Toe is whether the wheels point slightly inward or outward relative to straight ahead. Camber is how far the top of the wheel tilts in or out from vertical. Caster is the angle of the steering axis, which affects straight-line stability and how the wheel returns to center.
Those angles drift when you hit a curb or a pothole, when suspension or steering components wear, and after work that disturbs the suspension. The consequences are uneven tire wear, poor straight-line tracking, and steering that does not feel right.
Nothing about that is invented. The question is only whether it has happened to your car.
The tells, ranked by how objective they are
1. A crooked steering wheel on a straight road. The strongest tell, because it is visible and hard to argue with. If the car is travelling straight and the wheel is not centered, the geometry is off. You can see this from the driver’s seat with no equipment.
2. Wear on one edge of a tire. Also objective, also free, and it survives argument because it is physical evidence. A tire worn on the inner or outer shoulder while the rest of the tread is healthy points at camber or toe. Our guide on uneven tire wear patterns and what they are telling you covers reading the specific pattern.
3. A steady drift that makes you correct. Objective if you test it properly, described below. Less conclusive because road camber can produce a mild drift on a perfectly aligned car.
4. Loose or vague steering, tire squeal in gentle turns, vibration. Real symptoms, and the weakest evidence for alignment specifically, because worn components, balance and tire condition all produce them too.
If a shop’s recommendation rests entirely on item 4, that is the point to ask questions. If items 1 or 2 are present, the recommendation is probably well founded.
The at-home check
Find a flat, straight, quiet road with little traffic, and choose a stretch where the road surface is not obviously crowned to one side.
At a steady moderate speed, relax your grip on the wheel rather than letting go entirely, and watch what the car does over a few seconds. You are looking for a consistent drift that requires steering input to correct, not a slight wander.
Then repeat in the other direction on the same stretch of road. If the car drifts the same way both times, that points at the car. If it drifts toward the shoulder in both directions, you are probably reading road camber rather than a fault.
While you are at it, note where the steering wheel sits when the car is genuinely going straight.
The printout: making the recommendation auditable
This is the part almost nobody knows to ask for.
Modern alignment equipment measures each angle on each wheel and compares it against the manufacturer’s specification for your vehicle. It produces a report, usually with a before and an after, showing which readings were out of specification and by how much.
So the questions are:
- Can I see the before reading? If the car has been on the machine, this exists.
- Which angles were out of specification, and by how much?
- Can I have the after printout?
A shop that measured will produce the numbers readily. That transforms the conversation from “they say I need one” into “these two angles were outside the manufacturer’s range.” It also gives you a record, which is useful if the same symptom returns.
Alignment is not balancing
These get confused constantly and the wrong one gets bought regularly.
Alignment sets the angles at which the wheels point. Its symptoms are pulling, drifting, crooked steering, and uneven tire wear.
Balancing distributes weight evenly around each wheel and tire so it rotates smoothly. Its symptom is vibration at a particular speed, usually highway speed, felt through the wheel or the seat.
The distinguishing question: does the problem happen at a particular speed or in a particular direction? Vibration that arrives around a speed range and fades above and below it is a balance question. A car that will not track straight is an alignment question.
A vibration that appears only when you brake is neither, and is covered in our guide on a steering wheel that shakes when braking.
Similarly, a car that tracks straight normally and pulls only under braking does not have an alignment problem, whatever it feels like. That is a braking-force imbalance, covered in our guide on a car that pulls to one side when braking.
When it is worth doing without symptoms
There are a few situations where an alignment is sensible even though nothing feels wrong:
- After fitting new tires. You are protecting a purchase you have just made, and an alignment problem will wear the new set exactly as it wore the old one.
- After hitting something hard. A significant pothole or curb strike is the classic cause, and the effects can be too small to feel at first while still wearing tires.
- After suspension or steering work, where components that affect geometry have been disturbed.
- When buying a used car with unknown history, alongside the other unknowns covered in our guide on buying a car with no service history.
Shops commonly suggest an alignment check roughly annually or every 6,000 to 12,000 miles. Treat that as a reasonable inspection cadence rather than a replacement schedule; a check is not the same as an adjustment, and a check that finds everything in specification is a good outcome, not a wasted trip.
When an alignment will not hold
This is the caveat worth knowing before you pay.
Alignment adjusts angles. It cannot compensate for a worn component that is allowing the geometry to move. If a ball joint, tie rod end, control arm bushing or wheel bearing is worn, the angles can be set perfectly on the machine and will drift again in normal driving.
So if you have had an alignment and the symptom returned within weeks or months, the useful question is not whether the alignment was done correctly, it is whether something underneath is worn. Ask for the suspension and steering components to be inspected at the same time, and if a shop recommends replacing a component before aligning, that sequence is usually right rather than an upsell.
Aged or damaged tires are a related trap: an alignment does not fix a tire whose rubber is past its useful life, as covered in our guide on when a good-looking tire is too old to trust. For how this symptom fits with the rest, our guide to brake, tire and steering warning signs is the pillar for this cluster.
Frequently asked questions
How do I know if I really need an alignment?
Look for objective evidence: a steering wheel that sits crooked while driving straight, wear concentrated on one tire edge, or a consistent drift. Then ask for the before-and-after printout showing which angles were out of specification.
Can I check alignment myself?
You can check the symptoms. On a flat, straight, quiet road, relax your grip and see whether the car drifts consistently, and note where the steering wheel sits when travelling straight. Measuring the angles requires equipment.
What is the difference between alignment and balancing?
Alignment sets the angles the wheels point at and shows up as pulling, drifting or uneven wear. Balancing distributes weight around the wheel and shows up as vibration at a particular speed.
How often should I get an alignment?
Shops commonly suggest a check roughly annually or every 6,000 to 12,000 miles. A check is not an adjustment, and one that finds everything in specification is a good result.
Why did my car go out of alignment again so quickly?
Usually because a worn component is letting the geometry move. Alignment sets angles but cannot hold them if a ball joint, tie rod end or bushing is worn.