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SEAT Leon Mk1 (1M) (2000-2004) reliability

At a glance

SEAT Leon Mk1 (1M) built around 2004: about average at the MOT

SEAT Leon Mk1 (1M) models built around 2004 fail their MOT a little less often than similar cars the same age. An independent inspection matters more than the wider numbers on cars this old.

Looking at a SEAT Leon Mk1 (1M) right now?

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

Key figure

27% of MOT tests on SEAT Leon Mk1 (1M) models built around 2004 ended in a fail (retests included), against 32% for similar cars the same age.

Most common issue

The most common MOT issue on SEAT Leon Mk1 (1M) models built around 2004 involves the brakes.

SEAT Leon Mk1 (1M)
No reliability rating: not enough tests to rate2000-2004HatchbackPETROL / DIESEL

Based on 3,418 tests of Leon models registered 2000-2004.

About 1 in 12 Leon Mk1 (1M) MOTs (8.8%) failed and still hadn't passed 3 days later. That's for cars built around 2004 (21 years old), all fuels combined.

Based on 1,368 tests (DVSA MOT results, 2025). A fail that passed a retest within 3 days, even the same day, isn't counted. Nor is a fail with no later MOT on record.

About 1 in 15 Leon Mk1 (1M) MOTs (6.4%) found at least one dangerous defect. These are cars built around 2004 (21 years old).

Based on 1,368 tests (DVSA MOT results, 2025). Dangerous is the most serious grade an MOT gives: a direct risk to road safety.

Mk1 (1M) fail rate by age

Below typicalAbove typicalHigh (28% or more)Highest fail rateUK average for cars this age
Age / builtFail rateMOT tests
20 yearsbuilt around 2005
61231.4%
21 yearsbuilt around 2004
1,36827.3%
22 yearsbuilt around 2003
89228.5%
23 yearsbuilt around 2002
39828.9%
24 yearsbuilt around 2001
14829.0%

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 20 years old.

How the Leon Mk1 (1M) compares

At each age below, see how the Leon Mk1 (1M) holds up against other cars the same age. The averages combine all fuel types.

Based on 2,839 tests across 4 SEAT models, built around 2004 (21 years old).

Below typicalAbove typicalHigh (28% or more)Highest fail rateSEAT average
Age / builtFail rateMOT tests
20 yearsbuilt around 2005
61231.4%
21 yearsbuilt around 2004
1,36827.3%
22 yearsbuilt around 2003
89228.5%
23 yearsbuilt around 2002
39828.9%
24 yearsbuilt around 2001
14829.0%

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.

Brake pipes and hoses

High priority

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

Brake discs

High priority

Ask for the date and mileage of the last disc replacement; visually check for a deep wear lip and rust pitting on each disc.

Suspension bushes and joints

Worth checking

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

Tyres

Worth checking

Check tread depth across the full width on all four; uneven wear suggests alignment or suspension issues.

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 Leon Mk1 (1M).

  1. 1

    Subaru Impreza

    Same body type, tested at the same age

    Fail rate
    20.4%

    Lower fail rate: 20.4%, against 27.3% for the SEAT Leon Mk1 (1M), both built around 2004.

    Some figures could not be compared for these two cars. So this comparison uses the fail rate and recalls only.

    1,984 MOT tests on cars built around 2004

  2. 2

    Mini

    Same body type, tested at the same age

    Fail rate
    32.4%
    Still registered at 10 years
    95.6%

    No clear edge over the SEAT Leon Mk1 (1M) on these figures.

    Some figures could not be compared for these two cars. So this comparison uses the fail rate, share still registered and recalls only.

    17,263 MOT tests on cars built around 2004

  3. 3

    Renault Clio

    Same body type, tested at the same age

    Fail rate
    34.2%
    Still registered at 10 years
    93.9%

    No clear edge over the SEAT Leon Mk1 (1M) on these figures.

    Some figures could not be compared for these two cars. So this comparison uses the fail rate, share still registered and recalls only.

    7,283 MOT tests on cars built around 2004

  4. 4

    Toyota Yaris

    Same body type, tested at the same age

    Fail rate
    32.9%
    Still registered at 10 years
    95.4%

    No clear edge over the SEAT Leon Mk1 (1M) on these figures.

    10 critical recall campaigns matching this model/build period.

    15,502 MOT tests on cars built around 2004

Fail rate
= the share of MOT tests that ended in a fail. Retests count as tests.
Still registered at 10 years
= the share of cars still registered (taxed or declared off the road) 10 years after they were first registered.

How many are still registered

93%of all SEAT Leon cars first registered in 2014 to 2015 were still registered 10 years later. This is the whole model, not only this generation.

UK average for cars first registered in 2014 to 2015: 92% · About typical

The share still registered can reflect demand, the cost of repairs, exports, write-offs and how owners use the car. It isn't proof of how long the car lasts mechanically.

Source: DfT vehicle licensing statistics (VEH0124).

Recall context

24 recalls in all

3 of the 24 Leon Mk1 (1M) recalls cover cars built in these years.

  • 2 Critical
  • 1 more

Top concerns

  • Flywheel may fail
  • Anti lock brake control unit concern
  • Bolts of the tandem fuel pump cover may break

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

What has gone wrong on Leon Mk1 (1M) cars built around 2004

The share of petrol cars that have ever failed an MOT on each part of the car. Based on 404 cars.

Structural systems

Emissions
56%
Suspension
51%
Drivetrain
16%
Steering
8%
Bodywork
1%

Wear items

Lighting
73%
Brakes
60%
Tyres
52%

Rust, which the MOT calls corrosion: 10% of these cars show rust-related issues at this age.

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

How Leon Mk1 (1M) cars have aged

How Leon Mk1 (1M) 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.

Some lines cover only a year or two, so read this as a rough guide.

0%10%20%30%1718192021222324Age at MOTBuilt around 2004, 17 years old at the time of MOT: 31.6% (2,212 tests, 2021 data)Built around 2004, 18 years old at the time of MOT: 30.1% (1,722 tests, 2022 data)Built around 2004, 19 years old at the time of MOT: 29.8% (1,351 tests, 2023 data)Built around 2004, 20 years old at the time of MOT: 29.1% (1,062 tests, 2024 data)Built around 2004, 21 years old at the time of MOT: 27.0% (860 tests, 2025 data)2004Built around 2003, 18 years old at the time of MOT: 32.9% (1,629 tests, 2021 data)Built around 2003, 19 years old at the time of MOT: 30.0% (1,282 tests, 2022 data)Built around 2003, 20 years old at the time of MOT: 30.0% (1,032 tests, 2023 data)Built around 2003, 21 years old at the time of MOT: 30.2% (778 tests, 2024 data)Built around 2003, 22 years old at the time of MOT: 28.1% (615 tests, 2025 data)2003Built around 2002, 19 years old at the time of MOT: 30.4% (833 tests, 2021 data)Built around 2002, 20 years old at the time of MOT: 29.5% (647 tests, 2022 data)Built around 2002, 21 years old at the time of MOT: 30.0% (477 tests, 2023 data)Built around 2002, 22 years old at the time of MOT: 29.3% (362 tests, 2024 data)Built around 2002, 23 years old at the time of MOT: 28.2% (277 tests, 2025 data)2002Built around 2001, 20 years old at the time of MOT: 32.3% (433 tests, 2021 data)Built around 2001, 21 years old at the time of MOT: 31.1% (334 tests, 2022 data)Built around 2001, 22 years old at the time of MOT: 28.0% (189 tests, 2023 data)Built around 2001, 23 years old at the time of MOT: 27.8% (144 tests, 2024 data)Built around 2001, 24 years old at the time of MOT: 28.1% (121 tests, 2025 data)2001Built around 2000, 21 years old at the time of MOT: 35.5% (93 tests, 2021 data)Built around 2000, 22 years old at the time of MOT: 35.9% (64 tests, 2022 data)2000
First registered around 2004First registered around 2003First registered around 2002First registered around 2001
How each part holds up as Mk1 (1M) cars age

How each part holds up as Mk1 (1M) 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 car21 years22 years23 years24 years
Suspension51%54%62%55%
Brakes60%53%56%56%
Emissions56%57%57%46%
Tyres52%54%53%47%
Lighting73%72%71%68%
Drivetrain16%21%29%30%
Bodywork1%1%2%2%
Steering8%7%8%7%
Corrosion10%9%8%7%

Based on petrol cars in the pre-2005 build-year band, from 404 to 638 cars at each age.

Mk1 (1M) variants compared

Leon Mk1 (1M) variants built around 2004

The fail rate for each Leon Mk1 (1M) variant, grouped by fuel. Each row counts fails per MOT test, the same way as the main fail rate chart.

Petrol

  • LEON26.8%982 tests

Diesel

  • LEON28.6%385 tests
All generations of this modelEnough data

Most common issues on SEAT Leons of this age

This list covers every SEAT Leon built around 2004, whichever generation it is. We don't have a defect list for the Mk1 (1M) on its own.

Most common advisories and fails

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

  1. 1
    Advisory

    Brake pipe corroded or covered in grease

    21.0%
    Advisory: 420Fail: 23 (5% of the times it was found)
  2. 2
    Advisory

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

    18.6%
    Advisory: 348Fail: 53 (13% of the times it was found)
  3. 3
    Advisory

    Tyre worn close to the legal limit or worn on the edge

    18.4%
    Advisory: 356Fail: 29 (8% of the times it was found)
  4. 4
    Advisory

    Oil leak, but not excessive

    16.8%
    Advisory: 234Fail: 4 (2% of the times it was found)
  5. 5
    Advisory

    Brake disc worn, pitted or scored, but not seriously weakened

    13.7%
    Advisory: 260Fail: 7 (3% of the times it was found)

Based on 1,368 tests

Looking at a SEAT Leon Mk1 (1M) right now?

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

Frequently asked questions

Built around 2004 (21 years old), the SEAT Leon Mk1 (1M) (2000-2004) fails MOTs noticeably less often than typical for this age. This is based on 1,368 21-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 3,418 MOT tests on SEAT Leons first registered between 2000-2004. These figures are a guide, not a guarantee.