Hongyi Diablo Royale MOT failure rate
What a Hongyi Diablo Royale fails its MOT on, from real DVSA test data, and the part that resolves each item.
Based on 38 MOT tests in DVSA data.
We hold 38 MOT tests for the Hongyi Diablo Royale in the DVSA data. That is a smaller sample than our high-volume models, so treat these figures as indicative rather than definitive.
On what we have, about 18.4% fail, most often on suspension, exhaust & emissions, brakes, tyres. For a precise picture of your own car, use the registration check on the home page. Confirm any part against your registration or VIN before buying.
What it fails on, and why
Suspension failures usually mean a worn or snapped coil spring, a leaking shock absorber, or play in a lower arm ball joint or bush. The tester checks for corrosion, fractures and excessive movement. A broken front spring is one of the most common failures on higher-mileage cars and is a straightforward replacement.
Exhaust failures cover leaks, insecure mountings and emissions over the limit. A blowing exhaust, a failed lambda reading or a diesel that smokes beyond the limit will fail.
Brake failures cover worn pads and discs, an imbalance between wheels, corroded or scored discs, or a binding caliper. Braking efficiency is measured on a rolling road, so a spongy or pulling brake shows up as a low reading.
Tyres fail for tread below the 1.6mm legal limit across the central three-quarters, uneven or exposed-cord wear, or sidewall damage. The tester inspects all four; a single illegal tyre is a fail.
This covers a range of smaller items, from a non-working horn to a warning light left on.
The parts that fix each
If your car has just failed, you have 10 working days to fix the items and get a free partial retest. These are the usual parts; confirm the exact fitment against your registration or VIN before buying.
Other models
Sources: DVSA MOT History API: MOT test results and defect data ยท DVSA MOT testing data for Great Britain