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Vauxhall Cavalier Problems & Known Issues

The most common Vauxhall Cavalier problems ranked by severity — what to watch for, what it costs to fix, and what happens if you ignore it.

Generations

MK2 — Second Generation
1981–1988
1.6 8v, 1.8 8v, 2.0 8v
MK3 — Third Generation
1988–1995
1.6 8v, 1.8 8v, 2.0 8v

Top issues to watch for

The most serious Vauxhall Cavalier problems ranked by severity. We track 5 known issues — here are the ones you need to know about first.

Dangerous
Subframe mounting point structural weakness
MK2, MK31981–199540k–150k miles
The load-bearing structure around suspension mounting points deteriorates severely on Cavaliers, particularly where the subframe attaches to the body shell. Road salt accelerates corrosion of the mounting brackets and surrounding metal, leading to structural weakness that can cause suspension collapse. This is a safety-critical failure mode that makes the vehicle dangerous to drive.
What happens if ignoredStructural failure around suspension mounting points can cause loss of vehicle control and wheel detachment while driving. The subframe may separate from the body shell, causing immediate loss of steering and braking control. This is a roadworthiness failure requiring immediate welding repairs or vehicle scrapping.
Independent garage
£300–£800
Specialist
£400–£900
Parts only
£50–£200
Dangerous
Wheel bearing failure
MK2, MK31981–199540k–150k miles
Wheel bearings fail at exceptionally high rates on Cavaliers, with MOT data showing failure at 51 times the national fleet average. The bearings are undersized for the vehicle weight and develop excessive play that can lead to wheel detachment. Water ingress through worn seals accelerates wear, particularly on front wheels which carry higher loads. This is the most statistically significant fault affecting this model's roadworthiness.
What happens if ignoredWheel bearing collapse causes immediate loss of wheel control and can result in complete wheel detachment at speed. The wheel may lock up or separate from the hub, causing loss of vehicle control. This is an immediate roadworthiness failure requiring urgent repair before driving.
Independent garage
£80–£150
Specialist
£100–£180
Parts only
£25–£60
Major
General body corrosion
MK2, MK31981–199560k–150k miles
The body shell corrodes from inside out, particularly around door frames, sills, and rear wheel arches. Poor factory rustproofing and water trap areas make this inevitable on surviving examples. Corrosion reduces crash protection and structural integrity.
What happens if ignoredSevere body corrosion compromises crash protection and vehicle structural integrity. Advanced corrosion makes the car unsafe in an accident and can lead to MOT failure. Repair costs often exceed vehicle value, making most examples uneconomical to restore.
Independent garage
£400–£1,500
Specialist
£500–£2,000
Parts only
£100–£500
Major
Brake pipe corrosion
MK2, MK31981–199540k–150k miles
Brake pipes and ferrules corrode extensively on Cavaliers, with MOT failure rates significantly above the national average. The steel brake lines are exposed to road salt and moisture, leading to external corrosion and internal contamination from old brake fluid. Ferrule corrosion at connection points is particularly common and can cause brake fluid leaks and system pressure loss.
What happens if ignoredCorroded brake pipes can fail suddenly, causing complete brake system failure and loss of stopping ability. This creates immediate danger to occupants and other road users. Brake pipe failure requires immediate repair before the vehicle can be driven safely.
Independent garage
£150–£400
Specialist
£180–£450
Parts only
£50–£150

1 more known issues tracked

Including wear items, electrical niggles, and generation-specific problems. Check a specific car to see which issues apply to its age and mileage.

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MOT failure hotspots

Based on DVSA MOT test data. These are the items where the Vauxhall Cavalier fails at a significantly higher rate than the average car.

Seat mounting fault
Seatbelts & Airbags · 40-60k miles
MOT failure rate: 50x the fleet average
Sample: 125 tests
ABS fault
Suspension · 60-80k miles
MOT failure rate: 43x the fleet average
Sample: 110 tests
Wheel bearings worn
Suspension · 40-60k miles
MOT failure rate: 36x the fleet average
Sample: 543 tests
Emissions failure
Exhaust & Emissions · 150k+ miles
MOT failure rate: 35x the fleet average
Sample: 136 tests
Suspension component damaged or corroded
Suspension · 80-100k miles
MOT failure rate: 19x the fleet average
Sample: 185 tests
Structural corrosion
Bodywork · 60-80k miles
MOT failure rate: 17x the fleet average
Sample: 620 tests

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Related

Vauxhall Cavalier reliability FAQs

What are the most common problems with the Vauxhall Cavalier?

The Vauxhall Cavalier has 5 known issues across 3 severity levels. The most serious are: Subframe mounting point structural weakness, Wheel bearing failure.

Is the Vauxhall Cavalier reliable?

The Vauxhall Cavalier has 2 dangerous and 2 major known issues. Most can be avoided with a thorough pre-purchase check and full service history.

How much does it cost to fix Vauxhall Cavalier problems?

Repair costs range widely. The most significant issue (Subframe mounting point structural weakness) costs £300–£800 at an independent garage. Minor issues can be under £200. Always get a full inspection before buying.

Which Vauxhall Cavalier generation is most reliable?

The MK2 (1981–1988) has the fewest dangerous issues (2). However, condition and service history matter more than generation — a well-maintained earlier car can be more reliable than a neglected newer one.