Vauxhall Cavalier MOT Failures

An analysis of 9,881 real DVSA MOT tests on the Vauxhall Cavalier — what fails, how often, and how that compares to every other car on UK roads. Generations covered: MK2 (1981–1988), MK3 (1988–1995).

Where the Vauxhall Cavalier fails its MOT

The single biggest MOT failure point on the Vauxhall Cavalier is seat mounting fault — this model is 50 times more likely to fail on this item than the average car on UK roads. That makes it a significant weak point for anyone buying or owning this model. Across 9,881 MOT tests, 10.51% of all Vauxhall Cavalier tests recorded this as a failure.

Other notable weak points include brake hoses perished or damaged (9.9x the fleet average), structural corrosion (17x the fleet average), abs fault (43x the fleet average), and wheel bearings worn (36x the fleet average). These ratios compare the Vauxhall Cavalier's failure rate on each item against the national average for all cars tested — a ratio of 10x means this model fails ten times more often than a typical car.

The failures span 5 categories: Seatbelts & Airbags, Brakes, Bodywork, Suspension, Exhaust & Emissions. If you're inspecting a Vauxhall Cavalier before purchase, these are the areas to focus on — and if any have been flagged as advisories on a previous MOT, they're likely to become failures in the near future.

How failures change with mileage

The Vauxhall Cavalier's weak points shift as the car covers more miles. Understanding these patterns helps you know what to expect — and what to budget for — at each stage of ownership.

Under 60,000 miles

At this mileage, most failures are either design-related or caused by age rather than wear. Components like bushes and drop links may not have been replaced yet, and original-fit parts can deteriorate even on low-mileage cars that spend a lot of time sitting.

For the Vauxhall Cavalier specifically, the DVSA data shows the most common failures at this mileage are seat mounting fault (50x the average) and wheel bearings worn (36x). abs fault (20x) and fluid leak (11x) also appear frequently.

60,000 to 100,000 miles

This is where routine wear items start to show up. Brake components, tyres, and exhaust parts have done serious work by this point. Cars that have been well serviced will show fewer of these failures — this mileage band is where good maintenance really separates the well-kept from the neglected.

For the Vauxhall Cavalier specifically, the DVSA data shows the most common failures at this mileage are abs fault (43x the average) and seat mounting fault (21x). suspension component damaged or corroded (19x) and structural corrosion (17x) also appear frequently.

Over 100,000 miles

High-mileage cars accumulate failures across multiple systems. The key question isn't whether things will need doing — they will — but whether the car has been maintained well enough to keep on top of them. Look for a consistent service history and recent MOT passes with minimal advisories.

For the Vauxhall Cavalier specifically, the DVSA data shows the most common failures at this mileage are seat mounting fault (23x the average) and structural corrosion (15x). emissions failure (11x) and brakes imbalance across an axle (11x) also appear frequently.

Known issues beyond the MOT

An MOT only tests roadworthiness at a single point in time — it won't catch developing faults, intermittent problems, or issues that haven't yet reached the failure threshold. These are the issues that Vauxhall Cavalier specialists and owners flag most frequently, drawn from manufacturer technical bulletins, workshop data, and verified owner reports.

Subframe mounting point structural weakness Dangerous

The load-bearing structure around suspension mounting points deteriorates severely on Cavaliers, particularly where the subframe attaches to the body shell. Affects MK2, MK3; typical independent garage repair cost is £300–£800.

Wheel bearing failure Dangerous

Wheel bearings fail at exceptionally high rates on Cavaliers, with MOT data showing failure at 51 times the national fleet average. Affects MK2, MK3; typical independent garage repair cost is £80–£150.

General body corrosion Major

The body shell corrodes from inside out, particularly around door frames, sills, and rear wheel arches. Affects MK2, MK3; typical independent garage repair cost is £400–£1,500.

Brake pipe corrosion Major

Brake pipes and ferrules corrode extensively on Cavaliers, with MOT failure rates significantly above the national average. Affects MK2, MK3; typical independent garage repair cost is £150–£400.

For the complete picture — including repair costs across independent, specialist, and dealer garages — see the full Vauxhall Cavalier common problems breakdown.

What to check before buying a Vauxhall Cavalier

Based on the MOT failure data and known issues above, here's what to prioritise when inspecting a Vauxhall Cavalier:

Seatbelts & Airbags — check for seat mounting fault. Brakes — check for brake hoses perished or damaged, brakes imbalance across an axle. Bodywork — check for structural corrosion. Suspension — check for abs fault, wheel bearings worn, suspension component damaged or corroded.

Beyond the MOT items, ask specifically about subframe mounting point structural weakness and wheel bearing failure. These won't show up on a standard MOT but can be expensive to fix — repairs start from £300. A specialist pre-purchase inspection is worth the investment on this model.

Always check the car's full MOT history for patterns — recurring advisories often become failures within 12 months. And verify the service history to confirm maintenance has been kept up to schedule. Enter any reg into our free car check to see the complete picture.

MOT failure data sourced from DVSA bulk test records via data.gov.uk. Ratios compare this model's failure rate against the national fleet average. Known issues sourced from manufacturer bulletins, specialist workshops, and verified owner reports.