INFINITI FX50 S AUTO (2012)
Running costs, reliability data, and common problems from 38 real MOT tests.
Annual Cost
£2,045
£170/month
MOT Pass Rate
87%
Good
Road Tax
£395
Based on CC/year
Insurance
Grp 30-42
2993cc Diesel
Solid Option
87% pass rate, £2045/year to run. 5 points above average.
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Annual Running Costs
~40 mpg
Based on 2993cc
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
Good reliability. Occasional issues but generally solid. That's close to the national average of 82%.
At 14 years old, 87% of INFINITI FX50 S AUTOs from 2012 passed their MOT first time in 2026. That's based on 38 tests across the UK. The average mileage at this age is 77,751 miles.
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How Does It Compare?
Mileage Analysis
77,751
Average miles
103,600
Expected for age
The average 2012 INFINITI FX50 S AUTO has 77,751 miles on the clock, which is below the expected 103,600 miles for a 14-year-old car. This suggests lighter use than average, which generally means less wear on major components.
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About the 2012 INFINITI FX50 S AUTO
The 2012 INFINITI FX50 S AUTO is a premium performance with a 2993cc diesel engine. 38 of these vehicles were MOT tested in 2026, making it a rare model on UK roads. Among all cars from 2012, the average MOT pass rate is 78%, and this model beats that benchmark.
With an average of 77,751 miles at 14 years old, INFINITI FX50 S AUTO owners tend to use this car less than the typical driver.
2012 INFINITI FX50 S AUTO Fuel Costs
The 2993cc 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 2012 INFINITI FX50 S AUTO?
Total estimated annual running cost is £2,045 (£170/month), broken down as £1245 fuel, £395 road tax, £55 MOT, and £350 predicted repairs. Repair costs are moderate, reflecting the 87% pass rate. Keeping on top of servicing will help avoid surprises.
Buying a Used 2012 INFINITI FX50 S AUTO
At 14 years old, the INFINITI FX50 S AUTO 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. Note: with only 38 tests in our data, these figures should be treated as indicative rather than definitive.
Common Issues to Watch For
Based on the 2012 INFINITI FX50 S AUTO'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.
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 2012 INFINITI FX50 S AUTO stacks up against similar cars for annual running costs, insurance, and tax.
| Car | Pass Rate | Fuel/yr | Tax/yr | Insurance | Total/yr |
|---|---|---|---|---|---|
| INFINITI FX50 S AUTO(2012) | 87% | £1245 | £395 | Grp 30-42 | £2045 |
| LAND ROVER RANGE ROVER(2013) | 88% | £1245 | £250 | Grp 30-42 | £1900-£145 |
| AUDI A4(2011) | 82% | £1245 | £250 | Grp 30-42 | £1900-£145 |
| JAGUAR XF(2014) | 84% | £1245 | £250 | Grp 30-42 | £1900-£145 |
| AUDI A5(2013) | 85% | £1245 | £250 | Grp 30-42 | £1900-£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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