How much does a 2004 VAUXHALL SIGNUM cost to run?

Estimated annual running cost is £2,057 (£171/month), including £1037 fuel, £265 road tax, £55 MOT, and £700 predicted repairs.

What is the MOT pass rate for a 2004 VAUXHALL SIGNUM?

The 2004 VAUXHALL SIGNUM has a 67% MOT pass rate based on 307 tests in 2026. This ranks 408 out of 491 cars from 2004.

Which year VAUXHALL SIGNUM is most reliable?

The 2003 VAUXHALL SIGNUM has the highest MOT pass rate at 77%. The least reliable year is 2008 at 63%.

VAUXHALL SIGNUM (2004)

Q: What is the average mileage for a 2004 VAUXHALL SIGNUM?

The average mileage for a 2004 VAUXHALL SIGNUM is 121,492 miles, which is below the expected 162,800 miles for a 22-year-old car. This suggests lighter use than average, which generally means less wear on major components.

Running costs, reliability data, and common problems from 307 real MOT tests.

Annual Cost

£2,057

£171/month

MOT Pass Rate

67%

Below Avg

Road Tax

£265

Based on CC/year

Insurance

Grp 18-32

1796cc Diesel

Proceed With Caution

67% pass rate, £2057/year to run. 15 points below average.

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Diesel1796cc22 years old307 tests121k miles avg

Annual Running Costs

Fuel (Diesel, 1796cc)

~48 mpg

£1,037

Road Tax

Based on 1796cc

£265

MOT Test

£55

Predicted Repairs

Higher estimate due to low pass rate

£700

Total per year£2,057

Per month£171/mo

Per week£40/wk

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

67% MOT pass rate(Below Avg)

0%National avg: 82%100%

Below average reliability. Budget extra for maintenance and repairs. That's 15 points below the national average of 82%. It falls below the VAUXHALL brand average of 84%.

At 22 years old, 67% of VAUXHALL SIGNUMs from 2004 passed their MOT first time in 2026. That's based on 307 tests across the UK. The average mileage at this age is 121,492 miles.

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How Does It Compare?

Rank among 2004 cars408th of 491(top 83%)

Rank among VAUXHALL models845th of 882(top 96%)

vs national average-15%(82% avg)

vs 2004 cars average-5%(72% avg)

vs VAUXHALL average-17%(84% avg)

Mileage Analysis

121,492

Average miles

162,800

Expected for age

The average 2004 VAUXHALL SIGNUM has 121,492 miles on the clock, which is below the expected 162,800 miles for a 22-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 2003 model with a 77% MOT pass rate, while the 2008 model has the lowest at 63%. The 2004 sits between the two at 67%.

VAUXHALL SIGNUM by Year

Year	Pass Rate	Tests	Avg Mileage
2008	63%	63	130,218 mi
2007	71%	538	128,236 mi
2006	74%	832	124,339 mi
2005	73%	382	124,763 mi
2004	67%	307	121,492 mi
2003	77%	111	111,342 mi

Similar Cars to Consider

FORD FIESTA

2006 · 1399cc Diesel

£1,490/year

70%

+3%

VOLKSWAGEN GOLF

2006 · 1896cc Diesel

£1,727/year

72%

+5%

VOLKSWAGEN POLO

2006 · 1400cc Diesel

£1,690/year

68%

+1%

TOYOTA YARIS

2006 · 1364cc Diesel

£1,490/year

73%

+6%

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About the 2004 VAUXHALL SIGNUM

The 2004 VAUXHALL SIGNUM is a family car with a 1796cc diesel engine. 307 of these vehicles were MOT tested in 2026, making it a less common model in the UK market. It sits in the bottom 83% of 2004 cars for MOT pass rates.

With an average of 121,492 miles at 22 years old, VAUXHALL SIGNUM owners tend to use this car less than the typical driver.

2004 VAUXHALL SIGNUM Fuel Costs

The 1796cc diesel engine offers a reasonable balance between performance and economy. Expect around 48 mpg in mixed driving, which works out to roughly £1,037 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 2004 VAUXHALL SIGNUM?

Total estimated annual running cost is £2,057 (£171/month), broken down as £1037 fuel, £265 road tax, £55 MOT, and £700 predicted repairs. The higher repair estimate reflects the 67% MOT pass rate. Cars in this bracket tend to need work on suspension, brakes, and emissions components.

VAUXHALL SIGNUM Reliability Trend

The VAUXHALL SIGNUM has maintained consistent MOT pass rates across model years, varying by only 3 percentage points.

Buying a Used 2004 VAUXHALL SIGNUM

At 22 years old, the VAUXHALL SIGNUM 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 2003 model has the highest pass rate at 77%.

Common Issues to Watch For

Based on the 2004 VAUXHALL SIGNUM's fuel type, age, and engine size, these are the most likely problem areas to check.

DPF (Diesel Particulate Filter)

Watch out

Short journeys clog the DPF. Replacement costs £1,000-£2,500. Check the DPF warning light and ask about driving patterns.

Turbo Wear

Watch out

Diesel turbos work harder and wear faster. Listen for whining noises and check for oil leaks around the turbo housing.

EGR Valve

Watch out

Exhaust Gas Recirculation valves clog with carbon deposits, causing rough running and poor economy. Cleaning costs £150-£300, replacement £300-£600.

Rust and Corrosion

Watch out

At 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 out

Rubber 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 out

With an average of 121k 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 risk

High-mileage cars often need brake disc replacement, not just pads. A full set of discs and pads costs £200-£500 per axle.

Engine Mounts

Medium risk

Worn engine mounts cause excessive vibration and movement. Replacement costs £150-£400 per mount. Check for vibration at idle with the bonnet open.

Higher Than Average Failure Rate

Watch out

With a 67% MOT pass rate, this model fails more often than most. Budget for unexpected repairs and get a thorough pre-purchase inspection.

Service History

Low risk

Always 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 2004 VAUXHALL SIGNUM stacks up against similar cars for annual running costs, insurance, and tax.

Car	Pass Rate	Fuel/yr	Tax/yr	Insurance	Total/yr
VAUXHALL SIGNUM(2004)	67%	£1037	£265	Grp 18-32	£2057
FORD FIESTA(2006)	70%	£905	£30	Grp 8-20	£1490-£567
VOLKSWAGEN GOLF(2006)	72%	£1037	£135	Grp 18-32	£1727-£330
VOLKSWAGEN POLO(2006)	68%	£905	£30	Grp 8-20	£1690-£367
TOYOTA YARIS(2006)	73%	£905	£30	Grp 8-20	£1490-£567

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.