Should I check the MOT history before buying a 2004 Mazda Rx 8?

Yes. Look for recurring advisories — slow-building issues like corrosion or brake wear patterns show up years before they become failures. A full MOT history analysis will highlight patterns that a single test result won't reveal.

What corrosion should I look for when inspecting a 2004 Mazda Rx 8?

Check brake pipes, sills, subframes, and chassis legs. Surface rust is normal at this age; structural rust is a serious problem that is expensive to fix and can fail an MOT.

How are tyres and brakes typically on a 2004 Mazda Rx 8?

Tyres and brakes are the most common advisory items on vehicles of this age. Budget for replacement if they are near the limit, and factor this into your offer price.

How many 2004 Mazda Rx 8 vehicles have had dangerous defects recorded?

21% of these vehicles have had a dangerous defect recorded. Search the registration on CarHunch — the full MOT history will show exactly what was flagged and whether it was resolved.

Is the 2004 Mazda Rx 8 reliable?

Based on MOT data from 8,926 vehicles, the 2004 Mazda Rx 8 has a first-time MOT pass rate of 73.7%, indicating generally reliable for its class. Always check the full MOT history of any specific vehicle before buying.

What are common problems with the 2004 Mazda Rx 8?

The most frequently recorded MOT issues on the 2004 Mazda Rx 8 are: Nearside Rear Tyre worn close to the legal limit (82.3% of vehicles), Offside Rear Tyre worn close to the legal limit (82.3% of vehicles), Nearside Front Tyre worn close to the legal limit (61.3% of vehicles). These figures are based on actual MOT test records — search a specific registration on CarHunch to see its individual history.

Do I need an HPI check when buying a 2004 Mazda Rx 8?

Yes. The MOT history will not show outstanding finance, insurance write-offs, or stolen status. An HPI check covers these areas and should be part of any used car purchase.

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Mazda Rx 8 (2004)

8,926 real MOT outcomes analysed • 73.7% first-time pass rate

2004 Mazda Rx 8

CarHunch analysed 8,926 real MOT records for the 2004 Mazda Rx 8. Real test outcomes — pass rates, defect profiles, mileage data — from verified DVLA records. Updated as new MOTs are recorded.
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AI Analysis Reliability Overview Common Issues Check a Specific Reg Buyer's Checklist Pass Rate by Fuel Mileage Distribution Still on the Road MOT Averages Colour Breakdown Compare Models

The 2004 Mazda RX-8 falls short of the UK average with a 73.7% first-time pass rate—a clear sign of above-average reliability concerns—and one in five cars have recorded a dangerous defect at some point, which is worth taking seriously on a pre-purchase inspection. With an average of 3.3 failures per vehicle, this is a model that tends to need work when it goes for its MOT.

At around 50,600 miles median, these cars have covered a typical distance for their age, but the high advisory count of 11.6 per vehicle suggests persistent minor issues that nibble away at ownership costs. Before buying one, get a full pre-MOT history check and budget for a thorough inspection of the engine and cooling system, where the RX-8's rotary engine is known to show its age.

The 2004 Mazda Rx 8 has a below-average first-time pass rate (73.7% vs ~80% UK average) — check the specific vehicle's full MOT history carefully before buying.

⚠️ Over 1 in 5 of these vehicles have had a dangerous MOT failure at some point — usually tyres or brakes, and often a one-off issue rather than a persistent problem. The group stats won't tell you which one you're looking at.

First-time pass

73.7%

UK average ~80%

Below average

Dangerous (ever)

21%

At least once in MOT history

Check this vehicle

Avg failures / car

3.3

Over 11.9 tests on record

High

Typical mileage

51k

Middle half: 40k–63k

For context

⚠️ Below average. More vehicles in this cohort fail their first MOT than typical. Scrutinise this vehicle's history — look for recurring issues, not just the latest result.

🔧 Expect consumable spend. An average of 11.6 advisories per vehicle tells you wear items (tyres, brakes) get flagged regularly. Budget for them — they're not surprises.

🔍 The dangerous defect figure is real. Most are one-off tyre failures or brake issues — not structural problems. But it's exactly why checking the individual vehicle's history is essential, not optional.

These stats describe 8,926 vehicles as a group. The specific vehicle you're looking at could be the one good example or the one outlier. Run its registration to find out.

Buyer beware — pass it on

What tends to go wrong

Across 8,926 vehicles — figures show how many had each issue flagged at least once in their MOT history.

Tyre wear 82.3%

Nearside Rear Tyre worn close to the legal limit · Offside Rear Tyre worn close to the legal limit · Nearside Front Tyre worn close to the legal limit · …

Budget for a full set — on a vehicle this age, tyres are expected consumables. An inspection will confirm how much is left.

Brake wear 60.4%

Front Brake pad(s) wearing thin · Rear Brake pad(s) wearing thin · Front brake disc worn, pitted or scored, but not seriously weakened

Ask the seller when brakes were last serviced. If they don't know, factor in the cost.

Exhaust & emissions 30.3%

Exhaust emissions carbon monoxide content after 2nd fast idle excessive · Exhaust emissions Lambda reading after 2nd fast idle outside specified limits

Other issues 27.5%

Engine covers fitted obscuring some components in the engine bay · Under-trays fitted obscuring some underside components · Oil leak

Suspension & steering 16.5%

Offside Front Anti-roll bar linkage insecure

Harder to spot without a ramp — this is a good reason to book a pre-purchase inspection.

Data covers a 3-year window centred on 2004.

See this vehicle's full MOT history & AI hunches

Spot recurring advisories, hidden issues, and how it compares to 8,926 Mazda Rx 8 cars.

Before you buy a 2004 Mazda Rx 8

Based on MOT data from 8,926 vehicles — here's what to check.

📋 Check the full MOT history. 21% of these vehicles have had a dangerous defect recorded - recurring advisories often signal problems years before they become failures.
Search the reg on CarHunch for the full MOT history, reliability stats and a free AI-powered analysis of that exact vehicle.
🔍 Brake pipes, sills and subframes are the key areas on a vehicle this age — structural rust is hard to spot without getting underneath. A mechanic will check all of this before you commit, and give you a concrete basis to negotiate on price. Inspection →
📄 Outstanding finance, insurance write-offs and clocking won't appear in the MOT records — a dedicated history check covers all of this. Our link gets you 20% off automatically. History Get 20% off via CarHunch

Pass Rate by Fuel Type

Fuel type	Vehicles	Pass rate	Avg failures
Petrol (100%)	8,923	73.7%	3.3

Colour Breakdown

Based on 25,122 Mazda Rx 8 vehicles registered in the UK — across all years. From DVLA registration records.

Red 22.8%

5,732

Black 20.7%

5,204

Blue 20.3%

5,099

Grey 18.3%

4,602

Silver 14.4%

3,622

Green 1.5%

388

White 1.3%

325

Yellow 0.5%

125

Purple 0%

Orange 0%

Maroon 0%

Mileage Distribution

Most 2004 Mazda Rx 8 vehicles sit in the blue band. If the vehicle you're looking at is outside it, it's either unusually low or high mileage for its age.

50,646

typical

40,059

low mileage

62,507

high mileage

Half of all 2004 Mazda Rx 8 vehicles fall between 40,059 and 62,507 miles.

Is the mileage you're seeing normal?

✓ Under 40,059 miles — lower than most. Could be great, or could be a vehicle that rarely moved. Check test frequency and mileage progression in the MOT history.

✓ 40,059–62,507 miles — normal for age. This is where most 2004 Mazda Rx 8s sit.

⚠ Over 84,384 miles — higher than typical. Not necessarily a problem, but check service history and look out for advisory build-up on tyres and brakes.

2004 Mazda Rx 8 — Still on the Road

Numbers are thinning — 8% of 2004 Mazda Rx 8s are still active.

Numbers are declining — 389 vehicles still getting MOTs in 2025 (8% of peak).

Based on vehicles from this manufacture year that had at least one MOT test in each calendar year. Data from 2014–2025.
* The 2020 dip reflects the government's COVID-19 MOT exemption, which allowed certificates to be extended by six months — fewer tests were conducted that year.

MOT History Averages

11.9

Avg MOT tests per vehicle

3.3

Avg failures per vehicle

11.6

Avg advisories per vehicle

Other model years — Mazda Rx 8: All Rx 8 years → Which year to buy? →

2003 2005 2006 2007 2008 2009 2010

Or browse all models: Mazda →

Compare with another model

See how the 2004 Mazda Rx 8 stacks up against a rival.

Buyer beware — pass it on