How much does a 2004 VAUXHALL MONARO cost to run?

Estimated annual running cost is £2,757 (£230/month), including £1592 fuel, £760 road tax, £55 MOT, and £350 predicted repairs.

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

The 2004 VAUXHALL MONARO has a 82% MOT pass rate based on 201 tests in 2026. This ranks 99 out of 491 cars from 2004.

Which year VAUXHALL MONARO is most reliable?

The 2006 VAUXHALL MONARO has the highest MOT pass rate at 92%. The least reliable year is 2004 at 82%.

VAUXHALL MONARO (2004)

Q: Is the 2004 VAUXHALL MONARO reliable?

Good reliability. Occasional issues but generally solid. 82% of VAUXHALL MONAROs from 2004 passed their MOT first time in 2026, based on 201 tests. That's 0 points above the national average of 82%.

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

The average mileage for a 2004 VAUXHALL MONARO is 88,110 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 201 real MOT tests.

Annual Cost

£2,757

£230/month

MOT Pass Rate

82%

Good

Road Tax

£760

Based on CC/year

Insurance

Grp 35-50

5667cc Petrol

Solid Option

82% pass rate, £2757/year to run. Close to the national average.

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Petrol5667cc22 years old201 tests88k miles avg

Annual Running Costs

Fuel (Petrol, 5667cc)

~30 mpg

£1,592

Road Tax

Based on 5667cc

£760

MOT Test

£55

Predicted Repairs

£350

Total per year£2,757

Per month£230/mo

Per week£53/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

82% MOT pass rate(Good)

0%National avg: 82%100%

Good reliability. Occasional issues but generally solid. That's close to the national average of 82%.

At 22 years old, 82% of VAUXHALL MONAROs from 2004 passed their MOT first time in 2026. That's based on 201 tests across the UK. The average mileage at this age is 88,110 miles.

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How Does It Compare?

Rank among 2004 cars99th of 491(top 20%)

Rank among VAUXHALL models556th of 882(top 63%)

vs national average+0%(82% avg)

vs 2004 cars average+10%(72% avg)

vs VAUXHALL average-2%(84% avg)

Mileage Analysis

88,110

Average miles

162,800

Expected for age

The average 2004 VAUXHALL MONARO has 88,110 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 2006 model with a 92% MOT pass rate, while the 2004 model has the lowest at 82%. Consider a different year if reliability is a priority.

VAUXHALL MONARO by Year

Year	Pass Rate	Tests	Avg Mileage
2007	85%	91	59,933 mi
2006	92%	230	64,233 mi
2005	85%	221	73,102 mi
2004	82%	201	88,110 mi

Similar Cars to Consider

MERCEDES SL

2004 · 5513cc Petrol

£2,247/year

88%

+6%

BENTLEY CONTINENTAL

2006 · 5998cc Petrol

£2,097/year

92%

+10%

ASTON MARTIN DB9

2005 · 5935cc Petrol

£2,097/year

93%

+11%

ASTON MARTIN DB7

2002 · 5935cc Petrol

£2,097/year

92%

+10%

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About the 2004 VAUXHALL MONARO

The 2004 VAUXHALL MONARO is a performance with a 5667cc petrol engine. 201 of these vehicles were MOT tested in 2026, making it a less common model in the UK market. It ranks in the top 20% of all 2004 cars for reliability.

With an average of 88,110 miles at 22 years old, VAUXHALL MONARO owners tend to use this car less than the typical driver.

2004 VAUXHALL MONARO Fuel Costs

The 5667cc 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 2004 VAUXHALL MONARO?

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 82% pass rate. Keeping on top of servicing will help avoid surprises.

VAUXHALL MONARO Reliability Trend

Newer VAUXHALL MONAROs show better MOT pass rates than older ones, with an average improvement of 5 percentage points.

Buying a Used 2004 VAUXHALL MONARO

At 22 years old, the VAUXHALL MONARO 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.

Common Issues to Watch For

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

Timing Chain / Belt

Watch out

At 22 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 risk

Larger 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 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

Medium risk

With an average of 88k 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.

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 MONARO stacks up against similar cars for annual running costs, insurance, and tax.

Car	Pass Rate	Fuel/yr	Tax/yr	Insurance	Total/yr
VAUXHALL MONARO(2004)	82%	£1592	£760	Grp 35-50	£2757
MERCEDES SL(2004)	88%	£1592	£250	Grp 35-50	£2247-£510
BENTLEY CONTINENTAL(2006)	92%	£1592	£250	Grp 35-50	£2097-£660
ASTON MARTIN DB9(2005)	93%	£1592	£250	Grp 35-50	£2097-£660
ASTON MARTIN DB7(2002)	92%	£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.