BMW 1 Series (2018)
2018 BMW 1 Series
CarHunch analysed 12,307 real MOT records for the 2018 BMW 1 Series. This breakdown of actual test outcomes — pass rates, defect profiles, mileage data — isn't published anywhere else.
The 2018 BMW 1 Series passes MOT at 90.8%, significantly ahead of the UK average of 80%, and petrol versions perform particularly well at 91.7% versus diesel at 89.3%—though nearly a quarter of these cars (23.6%) have recorded a dangerous defect at some point, which is a serious buyer concern. These are relatively low-mileage cars for their age, averaging just 41,743 miles, suggesting either light use or good maintenance discipline among owners.
With an average of 0.61 failures per vehicle but 3.9 advisories, most issues caught are minor wear items rather than structural problems—typical for a premium hatchback with higher maintenance expectations. If you're considering one, request the full MOT history to check that dangerous defect flag isn't recent, and budget for the inevitable advisory work that comes with German engineering at this mileage point.
What to check before buying a 2018 BMW 1 Series
Practical pre-purchase checks for this age and model.
- 📋 Check the full MOT history. Look for recurring advisories — slow-building issues like corrosion or brake wear patterns show up years before they become failures. Enter the reg below for a full AI analysis.
- 🔍 Inspect for corrosion in person. Brake pipes, sills, subframes, and chassis legs. Surface rust is normal at this age; structural rust is a serious problem that's expensive to fix and can fail an MOT.
- 🛞 Check tyres and brakes. The most common advisory items at this age. Budget for replacement if they're near the limit — factor this into your offer price.
- ⚠️ 23.7% of these vehicles have had a dangerous defect recorded. Enter the reg below — the full MOT history will show exactly what was flagged and whether it was resolved.
- 📄 Run an HPI check. The MOT history won't show outstanding finance, insurance write-offs, or stolen status — an HPI check will.
Before you buy a BMW 1 Series
MOT history is one piece of the puzzle. These checks can reveal what CarHunch can't.
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Pass Rate by Fuel Type
| Fuel type | Vehicles | Pass rate | Avg failures |
|---|---|---|---|
| Petrol (64%) | 7,907 | 91.7% | 0.55 |
| Diesel (36%) | 4,399 | 89.3% | 0.72 |
| Diesel (0%) | 1 | 100% | 0 |
Mileage Distribution
Most 2018 BMW 1 Series vehicles sit in the blue band. If the car you're looking at is outside it, it's either unusually low or high mileage for its age.
Half of all 2018 BMW 1 Series vehicles fall between 27,834 and 45,434 miles.
2018 BMW 1 Series — Still on the Road
Strong survival — 11,584 vehicles still getting MOTs in 2025, 98% of the peak.
Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2021–2025.
MOT History Averages
Found a specific BMW 1 Series?
Enter the reg to see its individual MOT history, AI Hunches, and how it compares to this cohort.