Most Reliable Caterham Models: Real MOT Data Analysis
We analysed 2,545 real UK MOT tests to reveal which Caterham models pass most often, which years to buy, and which to avoid entirely.
2,545 MOT tests analysed
Real DVSA data covering every Caterham model from 2000-2023
Key Findings
Most Reliable Model
Caterham UNCLASSIFIED
89.1% pass rate
Best Single Year
Insufficient data
N/A
Caterham vs National Average
86.7% vs 71.5%
+15.2% above average
Durability Champion
N/A
N/A
Caterham has built its reputation on reliability, but does the data back it up? We analysed 2,545 real MOT tests from the DVSA database to find out exactly which Caterham models live up to the hype and which ones fall short.
This isn't survey data or owner opinions. These are actual pass/fail results from UK garages, covering every Caterham model sold in the UK from 2000 to 2023.
How Caterham Compares to Rivals
Caterham ranks #15 out of 75 manufacturers with a 86.7% average MOT pass rate. That's above the national average of 71.5%:
| Manufacturer | Pass Rate | Rank | Tests Analysed |
|---|---|---|---|
| Caterham | 86.7% | #15 | 2,545 |
| Toyota | 74.0% | #31 | 1,606,300 |
| Volkswagen | 72.2% | #43 | 2,967,545 |
| Nissan | 68.7% | #50 | 1,612,552 |
| Ford | 68.5% | #51 | 4,432,652 |
| Vauxhall | 65.4% | #59 | 3,038,498 |
The verdict: Caterham leads its competitors with a 86.7% pass rate. However, newer Caterham models significantly outperform this average.
Best Caterham Models by MOT Pass Rate
Looking at overall reliability across all years, here's how Caterham's core models rank against the 71.5% national average:
| Model | Pass Rate | vs National (71.5%) | Tests | Years |
|---|---|---|---|---|
| UNCLASSIFIED | 89.1% | +17.6% | 589 | 2016-2019 |
Top performer
The UNCLASSIFIED dramatically outperforms other Caterhams with an 89.1% pass rate, putting it among the most reliable cars in the database.
Caterham Hybrids vs Petrol vs Diesel
Caterham's fuel type comparison shows clear differences in reliability:
| Fuel Type | Average Pass Rate | vs National | Tests |
|---|---|---|---|
| Petrol | 89.1% | +17.6% | 589 |
What Goes Wrong on Caterhams?
When Caterhams fail MOTs, these are the most common causes:
| Failure Category | Total Failures |
|---|---|
| 1. Lamps, reflectors and electrical equipment | 33 |
| 2. Noise, emissions and leaks | 20 |
| 3. Visibility | 7 |
| 4. Brakes | 7 |
| 5. Tyres | 6 |
| 6. Identification of the vehicle | 6 |
| 7. Steering | 4 |
Pre-MOT checklist for Caterham owners:
- Check all bulbs (number plate lights are commonly missed)
- Check exhaust system for leaks and emissions
- Clean windscreen and check wiper blade condition
- Check brake pad thickness and disc condition
- Ensure tyres meet 1.6mm tread requirement
Frequently Asked Questions
Our Buying Recommendations
Best If Buying Nearly New
2019-2023 models with highest early pass rates
- Limited data for recent models
Note: Long-term durability not yet proven for these newer models
Best If Buying Used (Proven)
11+ years of proven durability data
- Limited proven durability data available
Caterham Models to Avoid (Proven Poor)
Proven below average at 11+ years - not just old, genuinely problematic
- No major proven reliability concerns
About This Data
This analysis uses real MOT test results from the DVSA database, covering 2,545 tests on Caterham vehicles between 2000 and 2023.
Year-Adjusted Scoring (v2.1): In year-by-year breakdowns, each vehicle is compared against the national average for vehicles of the same model year. This removes the natural bias where newer cars pass more often, allowing fair comparisons across eras.
Evidence-Tiered Durability: We separate "proven durability" (vehicles tested at 11+ years old) from "early performers" (3-6 years old). Only vehicles with proven long-term data are used for durability claims. Age-band comparisons use weighted national averages.
Minimum thresholds: 500 tests for proven durability rankings, 1,000 tests for early performer rankings. Pass rates are calculated as first-time passes, excluding retests.
The overall national average MOT pass rate is 71.51% based on 32.3 million tests across all manufacturers. Year-specific averages range from ~59% (2009 vehicles) to ~88% (2020 vehicles).
Check Any Vehicle's MOT History
Get the full MOT history, mileage records, and reliability insights for any UK vehicle. Make an informed decision before you buy.
Run a Free Check