Norton 18 Reliability, MOT Pass Rate & Common Faults
Free Norton 18 car check
Is the Norton 18 reliable? We analysed 390 real MOT tests across 100 vehicles to find out.
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The Norton 18 is above average for reliability based on real UK MOT data. Common problems include all position lamps do not illuminate immediately when switched on, roller brake test the less effective brake control does not achieve an efficiency of 25%. and floor brake test indicates a sticking brake. Here's everything you need to know before buying a used Norton 18.
Norton 18 Number Plates
Number plates registered to a Norton 18. Click on any registration for full vehicle details — including MOT history, mileage records, previous owners and damage history.
Norton 18 Problems — What Goes Wrong?
The most common reasons a Norton 18 fails its MOT, ranked by how often they occur. Check for these problems before you buy.
Norton 18 Mileage — What's Normal?
How many miles does a typical Norton 18 owner drive per year? Use this to check if a car you're looking at has suspiciously low or high mileage.
Norton 18 Mileage Distribution
Total mileage recorded across all Norton 18 MOT tests. If the car you're looking at is above the 75th percentile, it's done more miles than most.
How Does the Norton 18 Compare?
MOT pass rates compared to similar models. Click any model for the full breakdown.
| Model | Pass Rate | Tests | Typical Mileage | Lifespan |
|---|---|---|---|---|
| Norton 18 THIS CAR | 95.6% | 390 | 8,670 mi | — yrs |
| Norton Commando | 91.4% | 13,398 | 18,484 mi | 58 yrs |
| Norton Dominator | 93.2% | 4,068 | 8,674 mi | 72 yrs |
| Norton Commander | 92.3% | 2,220 | 26,431 mi | 55 yrs |
| Lexmoto Valencia | 76.1% | 675 | 3,777 mi | 13 yrs |
Compared to the Norton Commando (91.4% pass rate) and the Norton Dominator (93.2% pass rate), the Norton 18 outperforms both on MOT reliability.
Found a Norton 18 you like?
Run a full vehicle history check on the specific car. See finance, stolen, write-off, mileage and MOT data for that exact vehicle.
Check a specific Norton 18Should you buy a used Norton 18?
The Norton 18 has an overall MOT pass rate of 95.6% across 390 real MOT tests — comfortably above the UK average, which puts it among the more reliable models on UK roads.
The most common problems on the Norton 18 are all position lamps do not illuminate immediately when switched on (2 recorded failures), roller brake test the less effective brake control does not achieve an efficiency of 25%. (1), and floor brake test indicates a sticking brake (1). These are the faults most likely to cause an MOT failure on this model, so check for them carefully on any test drive or pre-purchase inspection. Many are wear-and-tear items that can be budgeted for, but a car that's already failing on multiple fronts may signal neglected maintenance.
A typical Norton 18 owner drives around 289 miles per year. If the car you're looking at is significantly above this, expect more wear on suspension, brakes and tyres. If it's well below, the vehicle may have been sitting unused — check for perished rubber, corroded discs and stale fluids.
Before committing to a purchase, we recommend running a full vehicle history check on the specific car. This will reveal any outstanding finance, stolen markers, write-off history and mileage discrepancies that the seller may not disclose — and that the MOT data alone can't tell you.