Mazda Bongo (2004)

Estimated running costs and MOT pass rates from 1,127 MOT tests in 2024.

Annual Cost

£2,641

£220/month

MOT Pass Rate

70%

Average

Road Tax

£410

Estimated/year

Est. Insurance

Grp 25-38

2500cc Diesel

Check Carefully

70% pass rate, £2,641/year to run. 12 points below average.

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Diesel2500cc22 years old1,127 tests129k miles avg

Annual Running Costs

Fuel (Diesel, 2500cc)

~40 mpg

£1,676

Road Tax

Estimated CO2 band

£410

MOT Test

£55

Predicted Repairs

Higher estimate due to low pass rate

£500

Total per year£2,641

Per month£220/mo

Per week£51/wk

Estimates based on 7,400 miles/year (UK average), diesel at 199.33p a litre (GOV.UK weekly average, week of 19 October 2026), GOV.UK road tax rates and repair likelihood from MOT data. Insurance not included.

Reliability Verdict

70% MOT pass rate(Average)

0%All-model avg: 82%100%

Average reliability. Expect some repairs as it ages. That's 12 points below the average of 82% across all models in our data. It falls below the Mazda brand average of 81%.

70% of MOT tests on Mazda Bongos from 2004 ended in a pass in 2024, when they were about 20 years old. That's based on 1,127 tests across the UK, retests included. The average mileage recorded at those tests was 129,099 miles.

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How Does It Compare?

Rank among 2004 models309th of 470(bottom half)

Rank among Mazda models381st of 459(bottom 18%)

vs average of all models-12%(82% avg)

vs 2004 models average-2%(72% avg)

vs Mazda average-11%(81% avg)

Mileage Analysis

129,099

Average miles

148,000

Expected for age

The average 2004 Mazda Bongo had 129,099 miles on the clock at its 2024 MOT, which is in line with the expected 148,000 miles for a 20-year-old car, suggesting normal everyday use.

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Best Year to Buy?

Of the years with at least 100 tests, the 2018 model has the highest MOT pass rate at 78%, while the 2009 model has the lowest at 63%. The 2004 scores 70%. Newer cars usually pass more often simply because they are younger, so compare years of a similar age.

Mazda Bongo by Year

Year	Pass Rate	Tests	Avg Mileage
2021	76%	99	98,059 mi
2020	74%	210	86,171 mi
2019	77%	220	101,242 mi
2018	78%	277	100,079 mi
2017	75%	478	110,285 mi
2016	72%	753	114,318 mi
2015	72%	770	120,943 mi
2014	68%	804	125,212 mi
2013	65%	706	138,716 mi
2012	68%	548	146,888 mi
2011	65%	736	149,648 mi
2010	64%	863	144,418 mi
2009	63%	796	146,139 mi
2008	66%	1,072	156,410 mi
2007	63%	1,331	150,625 mi
2006	67%	1,233	149,731 mi
2005	68%	1,384	139,153 mi
2004	70%	1,127	129,099 mi
2003	71%	764	116,308 mi
2002	76%	780	105,775 mi
2001	74%	738	107,775 mi
2000	75%	757	110,842 mi
1999	73%	610	116,062 mi
1998	69%	400	127,304 mi
1997	71%	573	137,918 mi
1996	65%	691	147,944 mi
1995	64%	504	157,843 mi

Similar Cars to Consider

Honda Civic

2006 · 2204cc Diesel

£2,641/year

71%

+1%

BMW 3 Series

2005 · 2926cc Diesel

£2,641/year

78%

+8%

Land Rover Discovery

2006 · 2495cc Diesel

£2,641/year

78%

+8%

Land Rover Range Rover Sport

2006 · 2720cc Diesel

£2,491/year

81%

+11%

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About the 2004 Mazda Bongo

The 2004 Mazda Bongo is a large car. Our records list a 2500cc diesel engine, though engines vary between versions. 1,127 MOT tests were recorded on this model in 2024, making it a reasonably common sight on UK roads. Among all models from 2004, the average MOT pass rate is 72%, and this model falls short of that benchmark.

With an average of 129,099 miles recorded at its 2024 MOT tests, Mazda Bongo owners drive about as much as the UK average.

2004 Mazda Bongo Fuel Costs

The 2500cc diesel engine is on the larger side, so fuel won't be this car's strong point. Expect around 40 mpg in mixed driving, which works out to roughly £1,676 per year with diesel at 199.33p per litre (GOV.UK weekly average, week of 19 October 2026; 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 Bongo?

Total estimated annual running cost is £2,641 (£220/month), broken down as £1,676 fuel, £410 road tax, £55 MOT, and £500 predicted repairs. Repair costs are moderate, reflecting the 70% pass rate. Keeping on top of servicing will help avoid surprises.

Mazda Bongo Reliability Trend

The Mazda Bongo has maintained consistent MOT pass rates across model years, varying by only 0 percentage points.

Buying a Used 2004 Mazda Bongo

At 22 years old, the Mazda Bongo 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 2018 model has the highest pass rate at 78%.

Common Issues to Watch For

These are typical issues for cars of this age, fuel type and engine size, not faults recorded on this model's MOT tests. Use them as a checklist when you view one.

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 129k 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.

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 Bongo stacks up against similar cars for estimated annual running costs, insurance group, and tax.

Car	Pass Rate	Fuel/yr	Tax/yr	Est. Ins. Group	Total/yr
Mazda Bongo(2004)	70%	£1,676	£410	Grp 25-38	£2,641
Honda Civic(2006)	71%	£1,676	£410	Grp 25-38	£2,641same
BMW 3 Series(2005)	78%	£1,676	£410	Grp 30-42	£2,641same
Land Rover Discovery(2006)	78%	£1,676	£410	Grp 25-38	£2,641same
Land Rover Range Rover Sport(2006)	81%	£1,676	£410	Grp 30-42	£2,491-£150

Estimates based on 7,400 miles/year, GOV.UK average pump prices for the week of 19 October 2026, GOV.UK road tax rates and MOT data. Insurance groups are our rough estimate from engine size, not official groups. Actual costs vary by driver, location, and usage.

Questions about the 2004 Mazda Bongo

Is the 2004 Mazda Bongo reliable?

Average reliability. Expect some repairs as it ages. 70% of MOT tests on 2004 Mazda Bongos ended in a pass, from 1,127 tests (DVSA MOT data for tests in 2024, retests included). That's 12 points below the average of 82% across all models in the same data.

How much does a 2004 Mazda Bongo cost to run?

Our estimate is £2,641 a year (£220 a month): £1,676 fuel, £410 road tax, £55 MOT and £500 predicted repairs, based on 7,400 miles a year. Insurance is not included.

What is the MOT pass rate for a 2004 Mazda Bongo?

70% of 1,127 MOT tests on the 2004 Mazda Bongo ended in a pass (DVSA MOT data for tests in 2024, retests included). That ranks it 309th of 470 models first registered in 2004 (bottom half).

Which year Mazda Bongo has the best MOT pass rate?

Of the years with at least 100 tests, the 2018 Mazda Bongo has the highest MOT pass rate at 78% and the 2009 the lowest at 63%. Newer cars usually pass more often simply because they are younger and have done fewer miles.

What is the average mileage for a 2004 Mazda Bongo?

The average mileage recorded at MOT tests on the 2004 Mazda Bongo is 129,099 miles, which is in line with the expected 148,000 miles for a 20-year-old car, suggesting normal everyday use.