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Wheel alignment

If the pressures are correct but the car still pulls, wheel alignment is the most common underlying cause. Alignment refers to the angles at which your tyres meet the road, and when those angles are off, the car tracks in a direction other than straight ahead.

Alignment goes out for all kinds of reasons: hitting a kerb, going through a bad pothole, or just gradual wear over time. You won't always notice it happening gradually, but you will notice the pulling once it's developed. The car doesn't lurch. It just consistently drifts to one side when you relax your grip on the steering wheel.

An alignment job is a straightforward workshop fix. Most mechanics can do it in under an hour. If you haven't had yours checked in the last 12-18 months, it's worth booking in, as misaligned wheels gradually wear tyres unevenly, which leads to the next issue.

Uneven tyre wear

Tyres that have worn unevenly across their width can cause pulling even when alignment and pressure are correct. The most common cause of uneven wear is alignment being out of spec for an extended period. The inner or outer edge of the tyre gets worked harder than the rest of the tread, creating a surface that doesn't grip equally across the contact patch.

You can check for this yourself by running your hand firmly across the tread surface of each front tyre. If it feels notably different on one side compared to the other, or if the wear pattern looks like a slope rather than a consistent depth, uneven wear may be contributing to the pull. Once tyre wear is uneven, it can't be corrected by alignment alone. The tyre itself will need replacing.

Brake drag: the urgent one

If your car pulls to one side specifically when you're braking, or if it pulls constantly and you've also noticed a burning smell, unusual heat near one wheel, or the car feeling like it's working harder than it should: this could be a stuck brake caliper.

A caliper is the mechanism that presses the brake pads against the disc. When it sticks, it keeps partial pressure on the disc even when you're not braking, generating heat, accelerating pad wear, and pulling the car toward the affected side.

Unlike the other causes on this list, brake drag can worsen quickly and affect your ability to stop safely. If pulling is accompanied by heat, smell, or a spongy brake pedal, get it seen by a mechanic the same day. Don't drive further than necessary before doing so.

Suspension and steering components

If you've ruled out pressure, alignment, wear, and brakes, the cause could be in the suspension or steering. Worn tie rods, deteriorated control arm bushings, or a damaged strut can all affect how the car tracks, whether you're in a compact hatch or a mid-size SUV like the used Mazda CX-5. These components wear gradually, and pulling is often accompanied by other symptoms: vibration through the steering wheel, clunking over bumps, or the car handling differently in corners than it used to.

Suspension diagnosis requires a workshop inspection. It's not something you can reliably assess from the driver's seat. If pulling appears alongside any of those other symptoms, it's worth booking it in and describing all of them, not just the pull, so the mechanic can pinpoint the cause efficiently.

Working through the checklist

The majority of pulling is explained by the first two causes: tyre pressure and alignment. It is genuinely worth ruling out tyre pressure before spending money on a workshop visit. Plenty of people have paid for an alignment job only to find one tyre was significantly underinflated to begin with. If you notice heat, smell, or a spongy pedal alongside the pull, skip straight to a same-day brake inspection.

Start with the tyres. Work outward from there.

Pulling to one side is the kind of thing that's easy to ignore because the car still drives. But each of these causes gets more expensive to fix the longer it's left, and the brake drag scenario can escalate into a safety issue. Carma checks steering, suspension, and brakes as part of the quality standards every car goes through before it's listed, so if you're in the market for a replacement, you're not inheriting someone else's deferred maintenance. Browse used cars at Carma and see what's available.