YAMAHA UNCLASSIFIED (2018)
Running costs, reliability data, and common problems from 118 real MOT tests.
Annual Cost
£1,405
£117/month
MOT Pass Rate
96%
Excellent
Road Tax
£195
Flat rate/year
Insurance
Grp 1-8
350cc Petrol
Great Choice
96% pass rate, £1405/year to run. 14 points above average.
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Annual Running Costs
~50 mpg
Flat rate (post-2017)
Low estimate due to excellent reliability
Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT data. Insurance not included.
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Reliability Verdict
Excellent reliability. Very few MOT failures. That's 14 points above the national average of 82%. It also outperforms the YAMAHA brand average of 92%.
At 8 years old, 96% of YAMAHA UNCLASSIFIEDs from 2018 passed their MOT first time in 2026. That's based on 118 tests across the UK. The average mileage at this age is 3,445 miles.
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How Does It Compare?
Mileage Analysis
3,445
Average miles
59,200
Expected for age
The average 2018 YAMAHA UNCLASSIFIED has 3,445 miles on the clock, which is significantly below the expected 59,200 miles for a 8-year-old car. Low-mileage examples may have spent time sitting unused, so check for issues like corroded brakes or perished rubber seals.
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Best Year to Buy?
The most reliable year is the 2006 model with a 100% MOT pass rate, while the 2015 model has the lowest at 79%. The 2018 sits between the two at 96%.
YAMAHA UNCLASSIFIED by Year
| Year | Pass Rate | Tests | Avg Mileage | |
|---|---|---|---|---|
| 2021 | 96% | 113 | 2,967 mi | |
| 2020 | 93% | 117 | 3,576 mi | |
| 2019 | 88% | 112 | 3,926 mi | |
| 2018 | 96% | 118 | 3,445 mi | |
| 2017 | 97% | 110 | 5,908 mi | |
| 2016 | 92% | 157 | 5,396 mi | |
| 2015 | 79% | 144 | 4,213 mi | |
| 2014 | 97% | 126 | 5,279 mi | |
| 2013 | 95% | 75 | 5,394 mi | |
| 2012 | 82% | 49 | 5,019 mi | |
| 2011 | 95% | 41 | 6,017 mi | |
| 2009 | 93% | 43 | 5,206 mi | |
| 2008 | 92% | 160 | 7,155 mi | |
| 2007 | 95% | 147 | 5,974 mi | |
| 2006 | 100% | 127 | 7,554 mi | |
| 2005 | 84% | 32 | 4,640 mi | |
| 2004 | 100% | 66 | 6,867 mi | |
| 2003 | 52% | 48 | 8,382 mi | |
| 2001 | 100% | 41 | 11,174 mi |
Similar Cars to Consider
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About the 2018 YAMAHA UNCLASSIFIED
The 2018 YAMAHA UNCLASSIFIED is a city car with a 350cc petrol engine. 118 of these vehicles were MOT tested in 2026, making it a rare model on UK roads. It ranks in the top 14% of all 2018 cars for reliability.
With an average of 3,445 miles at 8 years old, YAMAHA UNCLASSIFIED owners tend to use this car less than the typical driver. Very low mileage could mean the car has been garaged or used only for short trips, which can cause its own issues like battery drain and moisture buildup.
2018 YAMAHA UNCLASSIFIED Fuel Costs
The modest 350cc petrol engine keeps fuel costs low, which is a real advantage for a city car. Expect around 50 mpg in mixed driving, which works out to roughly £955 per year at current petrol prices of 142p per litre (based on 7,400 miles per year).
What does it cost to own a 2018 YAMAHA UNCLASSIFIED?
Total estimated annual running cost is £1,405 (£117/month), broken down as £955 fuel, £195 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 96% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
YAMAHA UNCLASSIFIED Reliability Trend
Older YAMAHA UNCLASSIFIEDs tend to have better MOT pass rates than newer ones, with an average decline of 5 percentage points across model years.
Buying a Used 2018 YAMAHA UNCLASSIFIED
At 8 years old, this is a solid used buy if you find one with good service history. Depreciation has levelled off, so you won't lose much more value. Focus on condition over mileage. If you're flexible on year, the 2006 model has the highest pass rate at 100%.
Common Issues to Watch For
Based on the 2018 YAMAHA UNCLASSIFIED's fuel type, age, and engine size, these are the most likely problem areas to check.
Coil Pack Failure
Medium riskSmaller petrol engines are prone to ignition coil failures, causing misfires and rough running. Replacement is £50-£150 per coil.
Suspension Wear
Medium riskShock absorbers, springs, and anti-roll bar links typically need attention around this age. Listen for clunks over bumps and check for uneven tyre wear.
Service History
Low riskAlways request a full service history. Regular servicing is the single best indicator of how well a car has been maintained, regardless of mileage.
Running Costs Compared
How the 2018 YAMAHA UNCLASSIFIED stacks up against similar cars for annual running costs, insurance, and tax.
| Car | Pass Rate | Fuel/yr | Tax/yr | Insurance | Total/yr |
|---|---|---|---|---|---|
| YAMAHA UNCLASSIFIED(2018) | 96% | £955 | £195 | Grp 1-8 | £1405 |
| NISSAN QASHQAI(2019) | 90% | £955 | £190 | Grp 1-8 | £1400-£5 |
| SUZUKI JIMNY(2019) | 95% | £955 | £190 | Grp 1-8 | £1400-£5 |
| MICROCAR M(2016) | 82% | £955 | £30 | Grp 1-8 | £1390-£15 |
| CF MOTO TRACKER(2017) | 98% | £955 | £190 | Grp 1-8 | £1400-£5 |
Estimates based on 7,400 miles/year, current fuel prices, and MOT data. Insurance groups are indicative. Actual costs vary by driver, location, and usage.
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