BIB is built on the complete official DVSA MOT inspection record - not estimates, not surveys, not forum opinion. Every insight comes from the same data used by the UK Government.
The DVSA publishes the complete record of every MOT test conducted in England, Scotland, and Wales. This is not a feed, a sample, or a licensed copy - it is the same official dataset used by the UK Government, updated as new data is released. BIB processes each release in full.
The DVSA data is the raw material. The intelligence is what BIB derives from it. Each of the 13 sections in a BIB report represents a proprietary layer of analysis - built, tested, and refined on the national dataset.
Having 289 million records is not enough on its own. What matters is how you use them. BIB's methodology is designed to produce results that are statistically meaningful - and to show nothing rather than something misleading when the evidence base is too thin.
BIB requires 100 MOT tests per model-year combination before showing reliability results. Below that threshold, nothing is shown - a blank is more honest than a figure derived from too few examples. A rate built on 12 tests tells you very little; one built on 12,000 tells you a great deal.
The 3-Year Test isolates a model's performance at its very first MOT - before any individual owner's care or neglect could have influenced the result. This strips away maintenance variables and reveals the model's inherent build quality as it left the factory.
Wear Guide thresholds are derived from advisory frequency across mileage bands for each model. For each of nine mechanical categories, BIB calculates the mileage at which 25%, 50%, and 75% of similar vehicles have historically developed that advisory - creating a statistically grounded wear profile.
The Reliability Score compares a specific car's MOT failure history against every other example of the same make, model, and year in the national dataset. A score of 75 means this car is outperforming 75% of comparable vehicles. The score is percentile-based, not arbitrary.
At 289 million records, patterns emerge that no individual car's history can reveal. These national benchmarks are what make every individual BIB report meaningful - without them, you have data. With them, you have context.
The benchmark every model is measured against. A model at 7% is failing at less than half the national rate.
Every make, model, and production year with enough test history to produce statistically reliable results.
BIB's minimum threshold per model-year combination. Below this, no result is shown - a blank is more honest than a weak figure.
Enter any UK registration plate. The MOT history is always free. One Bib (£3) unlocks all 13 intelligence sections.
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