FIAT UNCLASSIFIED (1998)
Running costs, reliability data, and common problems from 91 real MOT tests.
Annual Cost
£2,195
£183/month
MOT Pass Rate
71%
Average
Road Tax
£395
Based on CC/year
Insurance
Grp 25-38
2500cc Diesel
Check Carefully
71% pass rate, £2195/year to run. 11 points below average.
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Annual Running Costs
~40 mpg
Based on 2500cc
Higher estimate due to low pass rate
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
Average reliability. Expect some repairs as it ages. That's 11 points below the national average of 82%. It falls below the FIAT brand average of 83%.
At 28 years old, 71% of FIAT UNCLASSIFIEDs from 1998 passed their MOT first time in 2026. That's based on 91 tests across the UK. The average mileage at this age is 86,378 miles.
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How Does It Compare?
Mileage Analysis
86,378
Average miles
207,200
Expected for age
The average 1998 FIAT UNCLASSIFIED has 86,378 miles on the clock, which is significantly below the expected 207,200 miles for a 28-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 2021 model with a 97% MOT pass rate, while the 1992 model has the lowest at 45%. The 1998 sits between the two at 71%.
FIAT UNCLASSIFIED by Year
| Year | Pass Rate | Tests | Avg Mileage | |
|---|---|---|---|---|
| 2021 | 97% | 688 | 11,393 mi | |
| 2020 | 94% | 882 | 15,358 mi | |
| 2019 | 92% | 955 | 18,467 mi | |
| 2018 | 92% | 711 | 21,477 mi | |
| 2017 | 93% | 652 | 24,798 mi | |
| 2016 | 92% | 647 | 27,632 mi | |
| 2015 | 89% | 741 | 41,259 mi | |
| 2014 | 91% | 681 | 33,240 mi | |
| 2013 | 87% | 934 | 40,624 mi | |
| 2012 | 89% | 481 | 40,887 mi | |
| 2011 | 84% | 141 | 53,535 mi | |
| 2010 | 83% | 71 | 71,871 mi | |
| 2009 | 84% | 92 | 41,943 mi | |
| 2008 | 82% | 155 | 55,343 mi | |
| 2007 | 78% | 152 | 55,340 mi | |
| 2006 | 79% | 207 | 51,872 mi | |
| 2005 | 81% | 172 | 52,537 mi | |
| 2004 | 79% | 253 | 55,267 mi | |
| 2003 | 83% | 150 | 58,852 mi | |
| 2002 | 72% | 137 | 62,141 mi | |
| 2001 | 75% | 112 | 62,828 mi | |
| 2000 | 77% | 149 | 72,270 mi | |
| 1999 | 72% | 154 | 72,673 mi | |
| 1998 | 71% | 91 | 86,378 mi | |
| 1997 | 68% | 65 | 94,547 mi | |
| 1995 | 83% | 72 | 138,861 mi | |
| 1994 | 86% | 36 | 107,637 mi | |
| 1993 | 75% | 69 | 102,759 mi | |
| 1992 | 45% | 112 | 129,305 mi | |
| 1991 | 81% | 36 | 101,616 mi |
Similar Cars to Consider
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About the 1998 FIAT UNCLASSIFIED
The 1998 FIAT UNCLASSIFIED is a large car with a 2500cc diesel engine. 91 of these vehicles were MOT tested in 2026, making it a rare model on UK roads. Among all cars from 1998, the average MOT pass rate is 75%, and this model falls short of that benchmark.
With an average of 86,378 miles at 28 years old, FIAT 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.
1998 FIAT UNCLASSIFIED Fuel Costs
The 2500cc diesel engine is on the larger side, so fuel won't be this car's strong point. Expect around 40 mpg in mixed driving, which works out to roughly £1,245 per year at current diesel prices of 148p per litre (based on 7,400 miles per year). Diesel cars of this age should have their DPF (diesel particulate filter) checked, as replacements can be costly.
What does it cost to own a 1998 FIAT UNCLASSIFIED?
Total estimated annual running cost is £2,195 (£183/month), broken down as £1245 fuel, £395 road tax, £55 MOT, and £500 predicted repairs. Repair costs are moderate, reflecting the 71% pass rate. Keeping on top of servicing will help avoid surprises.
FIAT UNCLASSIFIED Reliability Trend
Newer FIAT UNCLASSIFIEDs show better MOT pass rates than older ones, with an average improvement of 15 percentage points.
Buying a Used 1998 FIAT UNCLASSIFIED
At 28 years old, the FIAT UNCLASSIFIED is firmly in budget territory. Purchase prices are low, but check for rust, worn suspension bushes, and electrical gremlins. A full service history is especially valuable at this age. If you're flexible on year, the 2021 model has the highest pass rate at 97%. Note: with only 91 tests in our data, these figures should be treated as indicative rather than definitive.
Common Issues to Watch For
Based on the 1998 FIAT UNCLASSIFIED's fuel type, age, and engine size, these are the most likely problem areas to check.
DPF (Diesel Particulate Filter)
Watch outShort journeys clog the DPF. Replacement costs £1,000-£2,500. Check the DPF warning light and ask about driving patterns.
Turbo Wear
Watch outDiesel turbos work harder and wear faster. Listen for whining noises and check for oil leaks around the turbo housing.
EGR Valve
Watch outExhaust Gas Recirculation valves clog with carbon deposits, causing rough running and poor economy. Cleaning costs £150-£300, replacement £300-£600.
Dual Mass Flywheel
Watch outLarger diesel engines put extra strain on the dual mass flywheel. Listen for rattling at idle. Replacement with clutch is £800-£1,500.
Rust and Corrosion
Watch outAt 10+ years, check wheel arches, sills, subframe, and brake lines for rust. Structural corrosion is an MOT failure. Prevention is far cheaper than repair.
Suspension Bushings
Watch outRubber suspension bushes harden and crack with age, causing knocking noises and vague handling. A full refresh costs £300-£800 depending on the car.
Clutch Wear
Medium riskWith an average of 86k miles, clutch replacement may be due (typical lifespan 60,000-100,000 miles). Budget £400-£800 for a new clutch kit.
Brake Discs and Pads
Medium riskHigh-mileage cars often need brake disc replacement, not just pads. A full set of discs and pads costs £200-£500 per axle.
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 1998 FIAT UNCLASSIFIED stacks up against similar cars for annual running costs, insurance, and tax.
| Car | Pass Rate | Fuel/yr | Tax/yr | Insurance | Total/yr |
|---|---|---|---|---|---|
| FIAT UNCLASSIFIED(1998) | 71% | £1245 | £395 | Grp 25-38 | £2195 |
| VOLKSWAGEN TRANSPORTER(1999) | 70% | £1245 | £250 | Grp 25-38 | £2050-£145 |
| LAND ROVER DEFENDER(1997) | 76% | £1245 | £250 | Grp 25-38 | £2050-£145 |
| LAND ROVER DISCOVERY(1999) | 75% | £1245 | £250 | Grp 25-38 | £2050-£145 |
| FORD TRANSIT(1998) | 72% | £1245 | £250 | Grp 25-38 | £2050-£145 |
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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