Peugeot 306 MOT Failures
An analysis of 40,465 real DVSA MOT tests on the Peugeot 306 — what fails, how often, and how that compares to every other car on UK roads. Generations covered: 306 (1993–2002).
Where the Peugeot 306 fails its MOT
The single biggest MOT failure point on the Peugeot 306 is emissions failure — this model is 144 times more likely to fail on this item than the average car on UK roads. That makes it an extreme outlier for anyone buying or owning this model. Across 40,465 MOT tests, 4.83% of all Peugeot 306 tests recorded this as a failure.
Exhaust and emissions failures often point to catalytic converter degradation, lambda sensor faults, or — in diesel models — DPF problems. These can be expensive to fix and will cause an immediate MOT failure.
Other notable weak points include light unit fault (187x the fleet average), exhaust system damage (27x the fleet average), load sensing valve seized or inoperative and ab... (167x the fleet average), and cable damaged or knotted (80x the fleet average). These ratios compare the Peugeot 306'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: Exhaust & Emissions, Lights & Electrics, Bodywork, Brakes, Steering. If you're inspecting a Peugeot 306 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 Peugeot 306'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 Peugeot 306 specifically, the DVSA data shows the most common failures at this mileage are light unit fault (187x the average) and emissions failure (144x). cable damaged or knotted (80x) and stop lamp with a multiple light source up to 1/... (63x) 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 Peugeot 306 specifically, the DVSA data shows the most common failures at this mileage are load sensing valve seized or inoperative and ab... (113x the average) and emissions failure (44x). steering rack wear (29x) and transmission joint, belt or chain worn (26x) 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 Peugeot 306 specifically, the DVSA data shows the most common failures at this mileage are load sensing valve seized or inoperative and ab... (167x the average) and power steering fault (55x). emissions failure (44x) and steering rack wear (34x) also appear frequently.
The shift from light unit fault at lower mileages to load sensing valve seized or inoperative and ab... at higher mileages is typical — early failures tend to be design or factory-related, while high-mileage failures reflect accumulated mechanical wear. A car that's been well maintained will usually dodge the worst of both.
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 Peugeot 306 specialists and owners flag most frequently, drawn from manufacturer technical bulletins, workshop data, and verified owner reports.
Brake hose deterioration and failure (306) Dangerous
Flexible brake hoses on the 306 deteriorate at an exceptional rate compared to other vehicles of this era. Affects 306; typical independent garage repair cost is £200–£350.
Steering rack gaiter and ball joint dust cover failure (306) Major
The rubber gaiters protecting the steering rack and ball joints fail at over 40 times the fleet average according to MOT data. Affects 306; typical independent garage repair cost is £80–£200.
Emissions system deterioration - petrol variants (306) Major
Petrol variants show emissions failures at up to This exceptionally high rate suggests systematic problems with the catalytic converter, lambda sensors, or engine management system on these engines. Affects 306; typical independent garage repair cost is £200–£600.
Brake caliper seizure (306) Major
MOT data shows brake imbalance failures at over 25 times the fleet average, indicating widespread brake caliper seizure problems. Affects 306; typical independent garage repair cost is £120–£200.
For the complete picture — including repair costs across independent, specialist, and dealer garages — see the full Peugeot 306 common problems breakdown.
What to check before buying a Peugeot 306
Based on the MOT failure data and known issues above, here's what to prioritise when inspecting a Peugeot 306:
Exhaust & Emissions — check for emissions failure. Lights & Electrics — check for light unit fault. Bodywork — check for exhaust system damage. Brakes — check for load sensing valve seized or inoperative and ab..., cable damaged or knotted, braking effort inadequate at a wheel, brake hoses perished or damaged.
Beyond the MOT items, ask specifically about brake hose deterioration and failure and steering rack gaiter and ball joint dust cover failure. These won't show up on a standard MOT but can be expensive to fix — repairs start from £200. 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.
Looking at a specific Peugeot 306?
Enter the reg to see its full MOT history, mileage records, write-off status, and finance checks.
Peugeot 306 MOT FAQs
What are the most common MOT failures on a Peugeot 306?
Based on 40,465 DVSA MOT tests, the most common failure is emissions failure — at 144x the national fleet average. Other frequent failures include light unit fault and exhaust system damage.
Is the Peugeot 306 reliable based on MOT data?
The Peugeot 306 has 22 MOT failure categories above the fleet average. Specialists also flag brake hose deterioration and failure as a concern. A pre-purchase inspection and service history check are recommended.
What MOT failures should I expect at high mileage?
Above 100,000 miles, the Peugeot 306 most commonly fails on load sensing valve seized or inoperative and ab... and power steering fault. Under 60,000 miles, the main issues are light unit fault and emissions failure.
How do I check a Peugeot 306's MOT history?
Enter the registration number into our free car check above. You'll see every MOT test result, advisories and failures, mileage readings, write-off status, and finance checks.
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.