INFINITI G (2012)
Running costs, reliability data, and common problems from 48 real MOT tests.
Annual Cost
£2,757
£230/month
MOT Pass Rate
83%
Good
Road Tax
£760
Based on CC/year
Insurance
Grp 35-50
3696cc Petrol
Solid Option
83% pass rate, £2757/year to run. Close to the national average.
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Annual Running Costs
~30 mpg
Based on 3696cc
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%. It falls below the INFINITI brand average of 87%.
At 14 years old, 83% of INFINITI Gs from 2012 passed their MOT first time in 2026. That's based on 48 tests across the UK. The average mileage at this age is 75,319 miles.
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How Does It Compare?
Mileage Analysis
75,319
Average miles
103,600
Expected for age
The average 2012 INFINITI G has 75,319 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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Best Year to Buy?
The most reliable year is the 2010 model with a 88% MOT pass rate, while the 2011 model has the lowest at 83%. The 2012 sits between the two at 83%.
INFINITI G by Year
Similar Cars to Consider
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About the 2012 INFINITI G
The 2012 INFINITI G is a premium performance with a 3696cc petrol engine. 48 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 75,319 miles at 14 years old, INFINITI G owners tend to use this car less than the typical driver.
2012 INFINITI G Fuel Costs
The 3696cc petrol engine is on the larger side, so fuel won't be this car's strong point. Expect around 30 mpg in mixed driving, which works out to roughly £1,592 per year at current petrol prices of 142p per litre (based on 7,400 miles per year).
What does it cost to own a 2012 INFINITI G?
Total estimated annual running cost is £2,757 (£230/month), broken down as £1592 fuel, £760 road tax, £55 MOT, and £350 predicted repairs. Repair costs are moderate, reflecting the 83% pass rate. Keeping on top of servicing will help avoid surprises.
Buying a Used 2012 INFINITI G
At 14 years old, the INFINITI G 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 2010 model has the highest pass rate at 88%. Note: with only 48 tests in our data, these figures should be treated as indicative rather than definitive.
Common Issues to Watch For
Based on the 2012 INFINITI G's fuel type, age, and engine size, these are the most likely problem areas to check.
Timing Chain / Belt
Watch outAt 14 years old, check whether the timing belt has been replaced (typically due every 5-7 years or 60,000-100,000 miles). A snapped belt can destroy the engine.
Oil Consumption
Medium riskLarger petrol engines can develop higher oil consumption as they age. Check the oil level and look for blue smoke from the exhaust.
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 G stacks up against similar cars for annual running costs, insurance, and tax.
| Car | Pass Rate | Fuel/yr | Tax/yr | Insurance | Total/yr |
|---|---|---|---|---|---|
| INFINITI G(2012) | 83% | £1592 | £760 | Grp 35-50 | £2757 |
| MERCEDES E(2010) | 80% | £1592 | £250 | Grp 35-50 | £2247-£510 |
| PORSCHE CAYENNE(2014) | 91% | £1592 | £250 | Grp 35-50 | £2097-£660 |
| PORSCHE 911(2014) | 96% | £1592 | £250 | Grp 35-50 | £2097-£660 |
| BENTLEY CONTINENTAL(2014) | 97% | £1592 | £250 | Grp 35-50 | £2097-£660 |
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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