What goes wrong, what it costs, and what to check before you buy a used Vauxhall Cavalier.
The Vauxhall Cavalier occupies a niche position on the UK market.
We track 5 known issues across the Vauxhall Cavalier range, including 2 rated as safety-critical. Knowing which variants and configurations to approach with caution can save you from expensive surprises after purchase.
Found a Vauxhall Cavalier? Enter the reg to see which of our 5 known issues apply to that exact car, plus full MOT history and mileage checks.
MK2 (1981–1988) — Engine options included the 1.6 8v, 1.8 8v, 2.0 8v. Our database flags 5 known issues on this generation, 2 of which are rated as safety-critical. The most significant concern is Subframe mounting point structural weakness (£300–£800 to address).
MK3 (1988–1995) — Engine options included the 1.6 8v, 1.8 8v, 2.0 8v. Our database flags 5 known issues on this generation, 2 of which are rated as safety-critical. The most significant concern is Subframe mounting point structural weakness (£300–£800 to address).
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.
Structural 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.
Inspect the wheel arches, sills, jacking points and door bottoms carefully. Press gently on sills to check for soft spots. Look underneath for corrosion on structural components. Check the MOT history for corrosion-related advisories or failures.
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.
Wheel 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.
Listen for knocking, clunking or rattling over bumps during the test drive. Inspect the underside for corroded or cracked suspension components. Check the MOT history for suspension-related advisories, which often predict future failures.
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.
Severe 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.
Inspect the wheel arches, sills, jacking points and door bottoms carefully. Press gently on sills to check for soft spots. Look underneath for corrosion on structural components. Check the MOT history for corrosion-related advisories or failures.
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.
Corroded 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.
Check brake disc condition for lipping or scoring. Test braking at moderate speed for pulling to one side or vibration through the steering wheel. Review MOT advisories for brake-related items.
Suspension components including control arms and associated brackets suffer from corrosion that affects their structural integrity. MOT data shows elevated failure rates for suspension component damage and corrosion. While not immediately dangerous like subframe issues, corroded suspension components can compromise handling and may fail suddenly under load.
Corroded suspension components affect handling and ride quality. Severe corrosion can lead to component failure and loss of vehicle control, particularly during emergency manoeuvres or hard braking. Components may need replacement rather than repair if corrosion is advanced.
Listen for knocking, clunking or rattling over bumps during the test drive. Inspect the underside for corroded or cracked suspension components. Check the MOT history for suspension-related advisories, which often predict future failures.
For the full breakdown of all 5 tracked issues with repair costs, see the Vauxhall Cavalier common problems page.
Based on 8k real DVSA MOT tests, the Vauxhall Cavalier fails more often than average on several items. The biggest outlier is seat mounting fault at 50x the fleet average, followed by abs fault (43x).
When viewing a specific car, check its MOT history for recurring advisories in these categories. See the full Vauxhall Cavalier MOT failure breakdown for data at every mileage point.
Routine servicing (oil and filter change every 6k miles) typically costs £45–£65 at an independent garage.
See the full Vauxhall Cavalier service schedule for every interval and cost breakdown.
The Vauxhall Cavalier has some well-documented weak points, including 2 safety-critical issues that demand careful checking. The right example, properly maintained, can still be a sound purchase — but cutting corners on the pre-purchase inspection is not advisable.
Before committing, check the car's full MOT history, verify the service record is complete, and if possible arrange a specialist inspection. Enter any registration into our free report to see the complete picture.
Get Car Wise maintains a database of known mechanical issues for every popular car on UK roads, tracking the faults that owners, specialists and DVSA data reveal.
When you run a report on a specific Vauxhall Cavalier, we cross-reference the exact variant, engine and age against our database of 5 known issues. Combined with full MOT history analysis, mileage verification and DVLA data, you get a complete picture before viewing.
Enter the registration for MOT history, mileage verification, known faults for that exact variant, and a Get Car Wise Score.
This guide was compiled from independent expert reviews, DVSA MOT data, specialist workshops and our own database of 5 known Vauxhall Cavalier issues. We are not affiliated with any source listed.