FIAT AUTO-SLEEPERS (2018)
Running costs, reliability data, and common problems from 41 real MOT tests.
Annual Cost
£1,995
£166/month
MOT Pass Rate
76%
Average
Road Tax
£195
Flat rate/year
Insurance
Grp 25-38
2300cc Diesel
Check Carefully
76% pass rate, £1995/year to run. 6 points below average.
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Annual Running Costs
~40 mpg
Flat rate (post-2017)
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 6 points below the national average of 82%. It falls below the FIAT brand average of 83%.
At 8 years old, 76% of FIAT AUTO-SLEEPERSs from 2018 passed their MOT first time in 2026. That's based on 41 tests across the UK. The average mileage at this age is 14,185 miles.
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Mileage Analysis
14,185
Average miles
59,200
Expected for age
The average 2018 FIAT AUTO-SLEEPERS has 14,185 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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About the 2018 FIAT AUTO-SLEEPERS
The 2018 FIAT AUTO-SLEEPERS is a large car with a 2300cc diesel engine. 41 of these vehicles were MOT tested in 2026, making it a rare model on UK roads. It sits in the bottom 99% of 2018 cars for MOT pass rates.
With an average of 14,185 miles at 8 years old, FIAT AUTO-SLEEPERS 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 FIAT AUTO-SLEEPERS Fuel Costs
The 2300cc diesel engine offers a reasonable balance between performance and economy. 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 2018 FIAT AUTO-SLEEPERS?
Total estimated annual running cost is £1,995 (£166/month), broken down as £1245 fuel, £195 road tax, £55 MOT, and £500 predicted repairs. Repair costs are moderate, reflecting the 76% pass rate. Keeping on top of servicing will help avoid surprises.
Buying a Used 2018 FIAT AUTO-SLEEPERS
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. Note: with only 41 tests in our data, these figures should be treated as indicative rather than definitive.
Common Issues to Watch For
Based on the 2018 FIAT AUTO-SLEEPERS'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.
AdBlue System
Medium riskPost-2015 diesels use AdBlue for emissions. Sensor failures and tank heater issues are common. Budget £200-£500 for repairs.
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.
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 FIAT AUTO-SLEEPERS stacks up against similar cars for annual running costs, insurance, and tax.
| Car | Pass Rate | Fuel/yr | Tax/yr | Insurance | Total/yr |
|---|---|---|---|---|---|
| FIAT AUTO-SLEEPERS(2018) | 76% | £1245 | £195 | Grp 25-38 | £1995 |
| VOLKSWAGEN GOLF(2018) | 92% | £1037 | £190 | Grp 18-32 | £1482-£513 |
| FORD TRANSIT(2017) | 81% | £1037 | £190 | Grp 18-32 | £1632-£363 |
| FORD KUGA(2019) | 91% | £1037 | £190 | Grp 18-32 | £1482-£513 |
| LAND ROVER RANGE ROVER EVOQUE(2016) | 90% | £1037 | £135 | Grp 18-32 | £1427-£568 |
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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