How much does a 2004 MAZDA UNCLASSIFIED cost to run?

Estimated annual running cost is £2,395 (£200/month), including £1245 fuel, £395 road tax, £55 MOT, and £700 predicted repairs.

What is the MOT pass rate for a 2004 MAZDA UNCLASSIFIED?

The 2004 MAZDA UNCLASSIFIED has a 65% MOT pass rate based on 126 tests in 2026. This ranks 451 out of 491 cars from 2004.

Which year MAZDA UNCLASSIFIED is most reliable?

The 1996 MAZDA UNCLASSIFIED has the highest MOT pass rate at 81%. The least reliable year is 2007 at 60%.

What is the average mileage for a 2004 MAZDA UNCLASSIFIED?

The average mileage for a 2004 MAZDA UNCLASSIFIED is 142,876 miles, which is in line with the expected 162,800 miles for a 22-year-old car, suggesting normal everyday use.

MAZDA UNCLASSIFIED (2004)

Running costs, reliability data, and common problems from 126 real MOT tests.

Annual Cost

£2,395

£200/month

MOT Pass Rate

65%

Below Avg

Road Tax

£395

Based on CC/year

Insurance

Grp 25-38

2499cc Diesel

Proceed With Caution

65% pass rate, £2395/year to run. 17 points below average.

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Diesel2499cc22 years old126 tests143k miles avg

Annual Running Costs

Fuel (Diesel, 2499cc)

~40 mpg

£1,245

Road Tax

Based on 2499cc

£395

MOT Test

£55

Predicted Repairs

Higher estimate due to low pass rate

£700

Total per year£2,395

Per month£200/mo

Per week£46/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

65% MOT pass rate(Below Avg)

0%National avg: 82%100%

Below average reliability. Budget extra for maintenance and repairs. That's 17 points below the national average of 82%. It falls below the MAZDA brand average of 81%.

At 22 years old, 65% of MAZDA UNCLASSIFIEDs from 2004 passed their MOT first time in 2026. That's based on 126 tests across the UK. The average mileage at this age is 142,876 miles.

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How Does It Compare?

Rank among 2004 cars451th of 491(top 92%)

Rank among MAZDA models440th of 483(top 91%)

vs national average-17%(82% avg)

vs 2004 cars average-7%(72% avg)

vs MAZDA average-16%(81% avg)

Mileage Analysis

142,876

Average miles

162,800

Expected for age

The average 2004 MAZDA UNCLASSIFIED has 142,876 miles on the clock, which is in line with the expected 162,800 miles for a 22-year-old car, suggesting normal everyday use.

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Best Year to Buy?

The most reliable year is the 1996 model with a 81% MOT pass rate, while the 2007 model has the lowest at 60%. The 2004 sits between the two at 65%.

MAZDA UNCLASSIFIED by Year

Year	Pass Rate	Tests	Avg Mileage
2018	91%	43	75,657 mi
2017	79%	68	96,220 mi
2016	74%	82	102,711 mi
2015	77%	74	96,497 mi
2014	66%	95	130,899 mi
2013	66%	50	136,777 mi
2012	77%	81	102,902 mi
2011	65%	98	130,473 mi
2010	73%	132	134,498 mi
2009	61%	102	158,332 mi
2008	64%	110	136,686 mi
2007	60%	129	140,498 mi
2006	66%	128	144,369 mi
2005	63%	141	133,297 mi
2004	65%	126	142,876 mi
2003	80%	130	121,502 mi
2002	69%	105	123,795 mi
2001	67%	70	119,895 mi
2000	70%	131	118,259 mi
1999	69%	58	115,948 mi
1998	69%	90	124,592 mi
1997	69%	71	128,169 mi
1996	81%	58	133,838 mi
1995	68%	59	135,637 mi

Similar Cars to Consider

HONDA CIVIC

2006 · 2204cc Diesel

£2,050/year

71%

+6%

BMW 3 SERIES

2005 · 2926cc Diesel

£2,050/year

78%

+13%

VOLKSWAGEN TRANSPORTER

2006 · 2461cc Diesel

£2,050/year

73%

+8%

LAND ROVER DISCOVERY

2006 · 2495cc Diesel

£2,050/year

78%

+13%

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About the 2004 MAZDA UNCLASSIFIED

The 2004 MAZDA UNCLASSIFIED is a large car with a 2499cc diesel engine. 126 of these vehicles were MOT tested in 2026, making it a rare model on UK roads. It sits in the bottom 92% of 2004 cars for MOT pass rates.

With an average of 142,876 miles at 22 years old, MAZDA UNCLASSIFIED owners drive about as much as the UK average.

2004 MAZDA UNCLASSIFIED Fuel Costs

The 2499cc diesel engine offers a reasonable balance between performance and economy. Expect around 40 mpg in mixed driving, which works out to roughly £1,245 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 MAZDA UNCLASSIFIED?

Total estimated annual running cost is £2,395 (£200/month), broken down as £1245 fuel, £395 road tax, £55 MOT, and £700 predicted repairs. The higher repair estimate reflects the 65% MOT pass rate. Cars in this bracket tend to need work on suspension, brakes, and emissions components.

MAZDA UNCLASSIFIED Reliability Trend

The MAZDA UNCLASSIFIED has maintained consistent MOT pass rates across model years, varying by only 1 percentage points.

Buying a Used 2004 MAZDA UNCLASSIFIED

At 22 years old, the MAZDA UNCLASSIFIED 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 1996 model has the highest pass rate at 81%.

Common Issues to Watch For

Based on the 2004 MAZDA UNCLASSIFIED'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.

Dual Mass Flywheel

Watch out

Larger diesel engines put extra strain on the dual mass flywheel. Listen for rattling at idle. Replacement with clutch is £800-£1,500.

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 143k 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 65% 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 MAZDA UNCLASSIFIED stacks up against similar cars for annual running costs, insurance, and tax.

Car	Pass Rate	Fuel/yr	Tax/yr	Insurance	Total/yr
MAZDA UNCLASSIFIED(2004)	65%	£1245	£395	Grp 25-38	£2395
HONDA CIVIC(2006)	71%	£1245	£250	Grp 25-38	£2050-£345
BMW 3 SERIES(2005)	78%	£1245	£250	Grp 30-42	£2050-£345
VOLKSWAGEN TRANSPORTER(2006)	73%	£1245	£250	Grp 25-38	£2050-£345
LAND ROVER DISCOVERY(2006)	78%	£1245	£250	Grp 25-38	£2050-£345

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.