GENERAL MOTORS CADILLAC (2008)
Running costs, reliability data, and common problems from 67 real MOT tests.
Annual Cost
£2,907
£242/month
MOT Pass Rate
73%
Average
Road Tax
£760
Based on CC/year
Insurance
Grp 35-50
3564cc Petrol
Check Carefully
73% pass rate, £2907/year to run. 9 points below average.
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Annual Running Costs
~30 mpg
Based on 3564cc
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 9 points below the national average of 82%. It falls below the GENERAL MOTORS brand average of 90%.
At 18 years old, 73% of GENERAL MOTORS CADILLACs from 2008 passed their MOT first time in 2026. That's based on 67 tests across the UK. The average mileage at this age is 101,097 miles.
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How Does It Compare?
Mileage Analysis
101,097
Average miles
133,200
Expected for age
The average 2008 GENERAL MOTORS CADILLAC has 101,097 miles on the clock, which is below the expected 133,200 miles for a 18-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 2009 model with a 87% MOT pass rate, while the 2006 model has the lowest at 69%. The 2008 sits between the two at 73%.
GENERAL MOTORS CADILLAC by Year
Similar Cars to Consider
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About the 2008 GENERAL MOTORS CADILLAC
The 2008 GENERAL MOTORS CADILLAC is a performance with a 3564cc petrol engine. 67 of these vehicles were MOT tested in 2026, making it a rare model on UK roads. Among all cars from 2008, the average MOT pass rate is 73%, and this model falls short of that benchmark.
With an average of 101,097 miles at 18 years old, GENERAL MOTORS CADILLAC owners tend to use this car less than the typical driver.
2008 GENERAL MOTORS CADILLAC Fuel Costs
The 3564cc 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 2008 GENERAL MOTORS CADILLAC?
Total estimated annual running cost is £2,907 (£242/month), broken down as £1592 fuel, £760 road tax, £55 MOT, and £500 predicted repairs. Repair costs are moderate, reflecting the 73% pass rate. Keeping on top of servicing will help avoid surprises.
GENERAL MOTORS CADILLAC Reliability Trend
The GENERAL MOTORS CADILLAC has maintained consistent MOT pass rates across model years, varying by only 3 percentage points.
Buying a Used 2008 GENERAL MOTORS CADILLAC
At 18 years old, the GENERAL MOTORS CADILLAC 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 2009 model has the highest pass rate at 87%. Note: with only 67 tests in our data, these figures should be treated as indicative rather than definitive.
Common Issues to Watch For
Based on the 2008 GENERAL MOTORS CADILLAC's fuel type, age, and engine size, these are the most likely problem areas to check.
Timing Chain / Belt
Watch outAt 18 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.
Clutch Wear
Watch outWith an average of 101k 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 2008 GENERAL MOTORS CADILLAC stacks up against similar cars for annual running costs, insurance, and tax.
| Car | Pass Rate | Fuel/yr | Tax/yr | Insurance | Total/yr |
|---|---|---|---|---|---|
| GENERAL MOTORS CADILLAC(2008) | 73% | £1592 | £760 | Grp 35-50 | £2907 |
| LAND ROVER FREELANDER(2007) | 75% | £1592 | £250 | Grp 35-50 | £2397-£510 |
| MERCEDES E(2010) | 80% | £1592 | £250 | Grp 35-50 | £2247-£660 |
| MERCEDES CLC(2009) | 73% | £1592 | £250 | Grp 35-50 | £2397-£510 |
| PORSCHE 911(2006) | 90% | £1592 | £250 | Grp 35-50 | £2097-£810 |
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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