Why does my car pull to one side?
Road camber, tyre pressures, a dragging brake and misaligned tracking all feel similar from the driver's seat. How to tell them apart before paying for an alignment you may not need.
- Difficulty
- beginner
- Time
- 15 min
- Read
- 4 min
- Safety
- caution
Short answer
Check tyre pressures first, when the tyres are cold — an underinflated tyre on one side is the single most common cause and costs nothing to rule out. Then decide whether the car pulls all the time, only under braking, or only on certain roads: braking-only points at a caliper, all-the-time points at alignment or a tyre, and road-dependent is usually camber doing exactly what it is designed to do.
British roads are built with a crown so water runs off, which means almost every car drifts gently left if you loosen your grip on a normal road. That is not a fault, and it is the reason the very first question is whether the pull follows the road or follows the car. Beyond that, there are only a handful of real causes, and they can be separated with checks that cost nothing before anyone charges for a four-wheel alignment.
Safety
Step by step
- Check all four tyre pressures cold, against the car's own figures.The correct pressures are on a sticker in the driver's door shut, inside the fuel filler flap or in the handbook — not on the tyre sidewall, which shows the tyre's maximum. A few psi difference side to side is enough to produce a noticeable pull.
- Establish whether the pull follows the road.Find a stretch of road with a different camber, or drive the same road in the other direction. If the pull swaps sides, it is camber and the car is fine. If it pulls the same way regardless, it is the car.
- Test whether it happens only under braking.On a clear, quiet road at moderate speed, brake gently with a light grip. A pull that appears only when braking, and disappears when you release, is a brake problem — usually a seized caliper or sticking slide pin on the opposite side to the pull.
- Look at the tyres themselves.Compare the wear across the tread of each tyre. Wear heavier on one edge than the other on the same tyre points at alignment. A tyre worn differently from its partner on the same axle, or a mismatched pair, can pull on its own. So can a damaged internal belt, which shows as an unexplained pull with no other cause.
- Feel whether the steering wheel is straight when the car goes straight.An off-centre wheel with the car tracking straight suggests the alignment has been disturbed, commonly after hitting a kerb or a deep pothole. This is what an alignment corrects, and it is worth having done properly on all four wheels rather than just the front.
- Think about what happened before it started.A pothole, a kerb, a new tyre, a suspension repair or an accident all give a date. "It started the day after I hit that pothole" narrows the diagnosis enormously.
Common mistakes
- Paying for an alignment before checking pressures — It is the most common cause and the only free one. An alignment done on badly inflated tyres can also be set wrongly.
- Assuming a pull is always alignment — Braking-only pulls are brakes, and no alignment will fix them. The braking test takes ten seconds and rules out the more urgent of the two.
If it doesn't work
Pulls one way, tyre pressures were uneven
Cause: Underinflation on one side — Fix: Set all four correctly cold and drive for a few days. If the pull goes, that was it — and find out why one was low, because a slow puncture will do it again.
Pulls only under braking, and one wheel is hot after a drive
Cause: Seized caliper or sticking slide pins — Fix: Garage job, and worth doing promptly. A binding brake wastes fuel, cooks the disc and can affect stability in an emergency stop.
Steering wheel off centre when travelling straight
Cause: Tracking or alignment disturbed — Fix: Have a four-wheel alignment done and ask for the before-and-after printout. Front-only tracking is cheaper and often does not solve it.
Started immediately after new tyres were fitted
Cause: A tyre with an internal fault, or a difference in tyres side to side — Fix: Go back to the fitter and ask them to swap the front tyres side to side. If the pull swaps direction with them, the tyre is the cause and should be replaced under warranty.
Pull comes and goes with load or when the boot is full
Cause: Worn suspension bushes or a spring — Fix: Have the suspension inspected. It is also worth checking ride height side to side on level ground — a broken coil spring is not always obvious.
Questions people ask
Is a slight drift to the left normal?
On a typical British road with a pronounced crown, yes. Test it on a flat surface such as an empty car park or a road with the opposite camber before treating it as a fault.
How often does alignment need doing?
There is no interval. It needs doing after a significant kerb or pothole impact, after most suspension or steering work, and whenever tyres are wearing unevenly. Otherwise a car that drives straight and wears its tyres evenly does not need it.
Can uneven tyre wear tell me what is wrong?
Yes, and the catalogue's guide to tyre wear patterns covers it in detail. In short: both edges worn is underinflation, the middle worn is overinflation, and one edge only is an alignment angle.