CADILLAC CTS (2005)
Running costs, reliability data, and common problems from 73 real MOT tests.
Annual Cost
£2,577
£215/month
MOT Pass Rate
75%
Average
Road Tax
£430
Based on CC/year
Insurance
Grp 30-42
2792cc Petrol
Check Carefully
75% pass rate, £2577/year to run. 7 points below average.
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Annual Running Costs
~30 mpg
Based on 2792cc
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 7 points below the national average of 82%. It falls below the CADILLAC brand average of 88%.
At 21 years old, 75% of CADILLAC CTSs from 2005 passed their MOT first time in 2026. That's based on 73 tests across the UK. The average mileage at this age is 72,414 miles.
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Mileage Analysis
72,414
Average miles
155,400
Expected for age
The average 2005 CADILLAC CTS has 72,414 miles on the clock, which is significantly below the expected 155,400 miles for a 21-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 2005 CADILLAC CTS
The 2005 CADILLAC CTS is a large car with a 2792cc petrol engine. 73 of these vehicles were MOT tested in 2026, making it a rare model on UK roads. Among all cars from 2005, the average MOT pass rate is 72%, and this model beats that benchmark.
With an average of 72,414 miles at 21 years old, CADILLAC CTS 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.
2005 CADILLAC CTS Fuel Costs
The 2792cc 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 2005 CADILLAC CTS?
Total estimated annual running cost is £2,577 (£215/month), broken down as £1592 fuel, £430 road tax, £55 MOT, and £500 predicted repairs. Repair costs are moderate, reflecting the 75% pass rate. Keeping on top of servicing will help avoid surprises.
Buying a Used 2005 CADILLAC CTS
At 21 years old, the CADILLAC CTS 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 73 tests in our data, these figures should be treated as indicative rather than definitive.
Common Issues to Watch For
Based on the 2005 CADILLAC CTS's fuel type, age, and engine size, these are the most likely problem areas to check.
Timing Chain / Belt
Watch outAt 21 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 2005 CADILLAC CTS stacks up against similar cars for annual running costs, insurance, and tax.
| Car | Pass Rate | Fuel/yr | Tax/yr | Insurance | Total/yr |
|---|---|---|---|---|---|
| CADILLAC CTS(2005) | 75% | £1592 | £430 | Grp 30-42 | £2577 |
| LAND ROVER FREELANDER(2007) | 75% | £1592 | £250 | Grp 35-50 | £2397-£180 |
| AUDI TT(2007) | 80% | £1592 | £250 | Grp 25-38 | £2247-£330 |
| SAAB 9-3(2007) | 76% | £1592 | £250 | Grp 30-42 | £2397-£180 |
| MERCEDES E(2004) | 78% | £1592 | £250 | Grp 35-50 | £2397-£180 |
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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