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Mazda 323 BJ (Mk7) (1998-2004) reliability

Not enough data

Mazda 323 BJ (Mk7) built before 2000: not enough MOT data yet

We've only seen a handful of Mazda 323 BJ (Mk7) models built before 2000 so far. Too few to spot a pattern yet.

Looking at a Mazda 323 BJ (Mk7) right now?

Enter its number plate to see its full MOT history, risk rating and running costs.

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Check a car’s number plate to see its own MOT record, or come back when there’s more MOT history.

Mazda 323 BJ (Mk7)
No reliability rating: not enough tests to rate1998-2004HatchbackPETROL

Based on 978 tests of 323 models registered 1998-2004.

BJ (Mk7) fail rate by age

Below typicalAbove typicalHigh (28% or more)Highest fail rateUK average for cars this age
Age / builtFail rateMOT tests
21 yearsbuilt around 2004
9630.2%
22 yearsbuilt around 2003
18829.3%
23 yearsbuilt around 2002
18833.5%
24 yearsbuilt around 2001
12235.3%
25+ yearsbuilt 2000 or earlier
38430.7%

Fail rate is the share of MOT tests that ended in a fail. Retests count as tests. How we count fail rates Build years are worked out from age, so they are approximate. Tests counted are 2025 MOTs. Highest fail rate at 24 years old.

How the 323 BJ (Mk7) compares

At each age below, see how the 323 BJ (Mk7) holds up against other cars the same age. The averages combine all fuel types.

Based on 21,573 tests across 4 Mazda models, built before 2000 (over 25 years old).

Below typicalAbove typicalHigh (28% or more)Highest fail rateMazda average
Age / builtFail rateMOT tests
21 yearsbuilt around 2004
9630.2%
22 yearsbuilt around 2003
18829.3%
23 yearsbuilt around 2002
18833.5%
24 yearsbuilt around 2001
12235.3%
25+ yearsbuilt 2000 or earlier
38430.7%

Fail rate is the share of MOT tests that ended in a fail. Retests count as tests. How we count fail rates Build years are worked out from age, so they are approximate. Tests counted are 2025 MOTs.

What to check before viewing

The model's most common MOT issues, turned into things you can ask about or look for.

Independent inspection

High priority

Have an independent specialist inspect the car before you commit.

Brake pipes and hoses

High priority

Look under the car for corrosion or chafing on the rigid brake pipes near the rear axle.

Suspension

Worth checking

Inspect the suspension carefully and ask the seller for repair history.

Suspension bushes and joints

Worth checking

Listen for knocks over speed bumps and ask about recent control-arm or anti-roll-bar work.

Suspension

Worth checking

Inspect the suspension carefully and ask the seller for repair history.

Leaks

Worth checking

Inspect the leaks carefully and ask the seller for repair history.

Vehicle-specific check

Worth checking

Check the car’s number plate on MOT Wise to see its own MOT history and any recalls for its build years.

Other hatchbacks to compare

Other hatchbacks, with each one's figures taken at the same age as the 323 BJ (Mk7).

  1. 1

    Ford Sierra

    Same body type, tested at the same age

    Fail rate
    11.5%
    Fail, no pass in 3 days
    6%
    Dangerous
    1.5%

    Lower fail rate: 11.5%, against 30.7% for the Mazda 323 BJ (Mk7), both built before 2000.

    3,022 MOT tests on cars built before 2000

  2. 2

    Vauxhall Nova

    Same body type, tested at the same age

    Fail rate
    15.2%
    Fail, no pass in 3 days
    6.8%
    Dangerous
    2.2%

    Lower fail rate: 15.2%, against 30.7% for the Mazda 323 BJ (Mk7), both built before 2000.

    1,003 MOT tests on cars built before 2000

  3. 3

    Ford Escort

    Same body type, tested at the same age

    Fail rate
    16.8%
    Fail, no pass in 3 days
    9.6%
    Dangerous
    3.8%

    Lower fail rate: 16.8%, against 30.7% for the Mazda 323 BJ (Mk7), both built before 2000.

    10,088 MOT tests on cars built before 2000

  4. 4

    Austin Mini

    Same body type, tested at the same age

    Fail rate
    22.6%
    Fail, no pass in 3 days
    5.9%
    Dangerous
    4.5%

    Lower fail rate: 22.6%, against 30.7% for the Mazda 323 BJ (Mk7), both built before 2000.

    3,373 MOT tests on cars built before 2000

Fail rate
= the share of MOT tests that ended in a fail. Retests count as tests.
Fail, no pass in 3 days
= the share of MOT tests that failed and still hadn't passed 3 days later. A fail that passed a retest within 3 days, even the same day, isn't counted.
Dangerous
= the share of MOT tests where the tester marked a fault as dangerous. It is against the law to drive the car until it is fixed.

Recall context

1 recall in all

1 323 BJ (Mk7) recall covers cars built in these years.

  • 1 recall

Top concerns

  • Fuel tank heatshield may become insecure

For the exact car, check GOV.UK's recall checker with the number plate.

What has gone wrong on 323 BJ (Mk7) cars built before 2000

The share of petrol cars that have ever failed an MOT on each part of the car. Based on 5,355 cars.

Structural systems

Suspension
58%
Emissions
37%
Drivetrain
25%
Bodywork
18%
Steering
4%

Wear items

Brakes
57%
Lighting
55%
Tyres
41%

Rust, which the MOT calls corrosion: 29% of these cars show rust-related issues at this age.

Check the sills, subframe and brake pipes before you decide.

How 323 BJ (Mk7) cars have aged

How 323 BJ (Mk7) cars have aged

How fail rates have changed as these cars got older. Each line follows cars first registered in about the same year across several years of MOT data. Not a prediction for any one car.

0%10%20%30%40%1819202122232425Age at MOTBuilt around 2003, 18 years old at the time of MOT: 35.1% (399 tests, 2021 data)Built around 2003, 19 years old at the time of MOT: 34.7% (308 tests, 2022 data)Built around 2003, 20 years old at the time of MOT: 36.6% (235 tests, 2023 data)Built around 2003, 21 years old at the time of MOT: 33.1% (172 tests, 2024 data)Built around 2003, 22 years old at the time of MOT: 30.6% (124 tests, 2025 data)2003Built around 2002, 19 years old at the time of MOT: 33.6% (348 tests, 2021 data)Built around 2002, 20 years old at the time of MOT: 35.2% (264 tests, 2022 data)Built around 2002, 21 years old at the time of MOT: 31.4% (185 tests, 2023 data)Built around 2002, 22 years old at the time of MOT: 36.5% (148 tests, 2024 data)Built around 2002, 23 years old at the time of MOT: 33.3% (102 tests, 2025 data)2002Built around 2001, 20 years old at the time of MOT: 27.4% (212 tests, 2021 data)Built around 2001, 21 years old at the time of MOT: 33.1% (172 tests, 2022 data)Built around 2001, 22 years old at the time of MOT: 31.3% (128 tests, 2023 data)Built around 2001, 23 years old at the time of MOT: 36.9% (84 tests, 2024 data)Built around 2001, 24 years old at the time of MOT: 35.2% (71 tests, 2025 data)2001Built around 2000, 21 years old at the time of MOT: 33.5% (224 tests, 2021 data)Built around 2000, 22 years old at the time of MOT: 32.3% (161 tests, 2022 data)Built around 2000, 23 years old at the time of MOT: 31.7% (120 tests, 2023 data)Built around 2000, 24 years old at the time of MOT: 33.7% (86 tests, 2024 data)Built around 2000, 25 years old at the time of MOT: 31.8% (85 tests, 2025 data)2000Built around 1999, 22 years old at the time of MOT: 33.6% (244 tests, 2021 data)Built around 1999, 23 years old at the time of MOT: 34.4% (180 tests, 2022 data)Built around 1999, 24 years old at the time of MOT: 27.7% (119 tests, 2023 data)Built around 1999, 25 years old at the time of MOT: 33.0% (97 tests, 2024 data)1999Built around 1998, 23 years old at the time of MOT: 31.6% (206 tests, 2021 data)Built around 1998, 24 years old at the time of MOT: 29.7% (165 tests, 2022 data)Built around 1998, 25 years old at the time of MOT: 36.0% (136 tests, 2023 data)1998
First registered around 2003First registered around 2002First registered around 2001First registered around 2000
How each part holds up as BJ (Mk7) cars age

How each part holds up as BJ (Mk7) cars age

The share of petrol cars built pre-2005 that have ever failed an MOT on each part of the car. Rates usually rise with age, but can dip slightly as cars leave the road.

Part of the car22 years23 years24 years
Suspension72%73%74%
Brakes74%70%65%
Emissions14%12%24%
Tyres51%54%57%
Lighting48%51%58%
Drivetrain2%2%3%
Bodywork37%35%23%
Steering2%3%2%
Corrosion59%54%43%

Based on petrol cars in the pre-2005 build-year band, from 309 to 463 cars at each age.

BJ (Mk7) variants compared
All generations of this modelNot much data

Most common issues on Mazda 323 models of this age

This list covers every Mazda 323 built before 2000, whichever generation it is. We don't have a defect list for the BJ (Mk7) on its own.

Most common advisories and fails

In order of the share of MOT tests that recorded each one

  1. 1
    Advisory

    Oil leak, but not excessive

    21.0%
    Advisory: 166Fail: 2 (1% of the times it was found)
  2. 2
    Advisory

    Suspension arm pin or bush worn, but not moving too much

    18.5%
    Advisory: 196Fail: 36 (16% of the times it was found)
  3. 3
    Advisory

    Brake pipe corroded or covered in grease

    15.0%
    Advisory: 187Fail: 6 (3% of the times it was found)
  4. 4
    Advisory

    Suspension mounting area corroded, but not seriously

    14.2%
    Advisory: 121Fail: 83 (41% of the times it was found)
  5. 5
    Advisory

    Suspension part corroded, but not seriously weakened

    13.8%
    Advisory: 243Fail: 5 (2% of the times it was found)

Based on 795 tests

Looking at a Mazda 323 BJ (Mk7) right now?

Enter its number plate to see its full MOT history, risk rating and running costs.

Frequently asked questions

Built before 2000 (over 25 years old), the Mazda 323 BJ (Mk7) (1998-2004) fails MOTs noticeably more often than typical for this age. This is based on 384 25+ year old MOT tests from DVSA data. Each retest counts as a test.

*The build year is worked out from the date a car was first used on UK roads. For most cars this matches when it was registered, but imports may differ by a few months.

Data sourced from DVSA MOT History API. From 978 MOT tests on Mazda 323 models first registered between 1998-2004. These figures are a guide, not a guarantee.