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MINI Cooper R50 problems (2001–2006)

The only engine of the MINI Cooper R50 that we have documented, the 1.4 D-4D, has high or critical severity faults in the versions it is fitted to. Our verdict for the versions it is fitted to: «With caution».[1][2][3][4][5]

Outside the engine: Outside the engine, the Mini Cooper R50 accumulates in the fiches-auto.fr reports faults in the power steering (rack and pump), the gearbox and clutch, the electric windows and the suspension. We have found no official campaigns for systems other than the engine.[2][6]

MINI Cooper R50 (2001–2006)
Photo: Damian B Oh · CC BY-SA 4.0 · Wikimedia Commons. Reference image for this generation.
02468105.3out of 10

MINI Cooper R50 rating: acceptable reliability

Calculated using only 9 documented faults and their sources: the most serious and frequent faults weigh more. Limited evidence: it is based on few sources or few documented faults, so it is not included in the rankings. Having few documented faults does not mean it is reliable: it may simply be little studied. How it is calculated

  • Engine5.25 faults
  • Gearbox6.81 fault
  • Suspension8.21 fault and ITV (technical inspection)
  • Brakes6.5Technical inspection (ITV) only: 1.4 times the defects normal for its age
  • Tyres and wheels10.0No documented faults
  • Steering7.11 fault and ITV (technical inspection)
  • Electrical system9.31 fault
  • Headlights and lights7.3Technical inspection (ITV) only: 1.1 times the defects normal for its age
  • Electronics and infotainment10.0No documented faults
  • Climate control10.0No documented faults
  • Bodywork and interior8.7Technical inspection (ITV) only: 0.5 times the defects normal for its age
  • Airbags and safety10.0No documented faults

The weak points of the MINI Cooper R50

  1. 1High severity: Turbocharger failure1.4 D-4D engine
  2. 2High severity: Power steering rack and pump failureSteering
  3. 3High severity: Faults in the CVT automatic gearbox, the manual gearbox and the clutchGearbox and clutch
  4. 4Medium severity: Injector wear and failure1.4 D-4D engine
  5. 5Medium severity: Clogged diesel particulate filter (DPF)1.4 D-4D engine

Documented engine

The first label is the most serious fault affecting that engine in this car; the second, our verdict for the versions it is fitted to. Each engine's risk index is calculated only from the faults that affect this car (how we calculate it). We only show engines we have documented with sources: if yours does not appear, we have not analysed it yet. View all engines

See what to check before buying

Outside the engine

8 sourcesHow we work

1.4 D-4D

Toyota 1.4 D-4D (1ND-TV) · Diesel

In the Cooper R50
2003–2006[2][7][8]
Name
One D
Faults that affect it
5 · 1 of high or critical severity
Risk index on this car
48
Moderate risk

Verdict for the versions it uses

  • 1.4 D-4D 75 (1ND-TV, 75 hp, 2002-2005)2002–2005 · 75 hp · 1ND-TV

    With caution

    The injectors, turbo and clutch and dual-mass flywheel assembly are documented on the first-generation Yaris and on the MINI One D with this same output; it is worth checking the history of these parts before buying.[1][2]

  • 1.4 D-4D 90 (1ND-TV, 88-90 hp, 2004-2018)2004–2018 · 88–90 hp · 1ND-TV

    With caution

    This is the version with the most documented cases of injector, turbo, EGR valve and clutch and dual-mass flywheel faults and, on units with a particulate filter, DPF clogging; it is worth checking these points before buying, although we have not found a pattern as serious as that of other, larger Toyota diesels.[3][4][5]

Faults that affect the Cooper R50

Only those that affect the versions and years that this car used. The 1.4 D-4D has 6 documented faults in total.

  1. High severityFrequency: CommonTurboTurbocharger failureYes: the 1.4 D-4D's turbo is documented as failing on the Yaris, Corolla, Auris and MINI One D, sometimes prematurely (one case at 15,000 km covered under warranty) and other times after seizing alongside high oil consumption.Appears at around 15,000 km
  2. Medium severityFrequency: CommonInjectionInjector wear and failureYes: the common-rail injectors on the 1.4 D-4D are documented as failing on the Yaris, Auris and MINI One D, with symptoms of jerking, noise and the engine warning light on; one source describes the problem as "chronic" on the MINI One D's engine.
  3. Medium severityFrequency: CommonEmissions controlClogged diesel particulate filter (DPF)Yes, on units with a standard-fit particulate filter: the 1.4 D-4D's DPF fills with soot on short trips, with the warning light on and, in one documented Auris case, a complete replacement at 236,000 km.
  4. Medium severityFrequency: CommonClutchPremature clutch and dual-mass flywheel wearThe 1.4 D-4D's clutch is frequently documented, almost always above 84,000 km, although there is the odd clearly premature case (a Yaris with the clutch replaced at 28,000 km); the dual-mass flywheel also fails, with proportionally more weight on the MINI One D.Appears at around 84,000 km
  5. Medium severityFrequency: OccasionalEmissions controlEGR valve clogged with sootYes, though with fewer cases than on other Toyota diesels: the 1.4 D-4D's EGR valve clogs with soot, especially on short trips, with cases from around 189,000 km on the Yaris and an inexpensive clean (around €60) that usually resolves it on the Corolla.Appears at around 189,000 km

Cooper R50 1.4 D-4D pageAll versions and faults of the 1.4 D-4D

Faults of the MINI Cooper R50 outside the engine

Suspension, brakes, tyres, electronics and the rest of the car. They occur with any engine.

What the MOT inspection finds on the MINI Cooper R50

Official Dutch MOT (APK) inspection data: 1,675 inspections of 617 cars registered between 2001 and 2005, compared with cars of the same age.

  • Suspension and axles· counts in the score

    Defects in 9.1% of inspections; in cars of its age, 10.7%.

    Average

  • Brakes· counts in the score

    Defects in 19.8% of inspections; in cars of its age, 14%.

    More defects than average

  • Steering· counts in the score

    Defects in 4.7% of inspections; in cars of its age, 4.8%.

    Average

  • Headlights and lights· counts in the score

    Defects in 31.2% of inspections; in cars of its age, 29.2%.

    Average

  • Rust and bodywork· counts in the score

    Defects in 0.8% of inspections; in cars of its age, 2.1%.

    Fewer defects than average

  • Exhaust and emissions

    Defects in 9.1% of inspections; in cars of its age, 6.8%.

    More defects than average

  • Fluid leaks

    Defects in 33.2% of inspections; in cars of its age, 14.9%.

    Many more defects than average

  • Glass, wipers and mirrors

    Defects in 7.2% of inspections; in cars of its age, 6.6%.

    Average

  • Tyres and wheels· depends mostly on maintenance

    Defects in 18% of inspections; in cars of its age, 17.3%.

    Average

The inspection measures wear and the defects visible at a periodic check, not engine or electronics failures. Source: RDW Open Data (public domain). How we calculate it · opendata.rdw.nl

Checklist for buying a used MINI Cooper R50

Check the advert or the paperwork to see which engine the car has and go through its section. Each point comes from a documented fault; you can tick them off as you inspect.

If it has the 1.4 D-4D (2003–2006)

Turbocharger failure

High severity

Injector wear and failure

Medium severity

Clogged diesel particulate filter (DPF)

Medium severity

Premature clutch and dual-mass flywheel wear

Medium severity

EGR valve clogged with soot

Medium severity

Wear parts for the MINI Cooper R50

Brakes, wiper blades, pollen filter and battery, searched for this model. The exact part number depends on the engine and year: confirm it with the registration plate or VIN.

Affiliate links: if you buy from these shops, MotorFiable may receive a commission at no cost to you. Check compatibility against the registration plate or VIN before ordering. Affiliate links

Buying a MINI Cooper R50?

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Own a MINI Cooper R50? Tell us what faults you have had, at what mileage and how much you paid. Report your fault.

Frequently asked questions

Is the MINI Cooper R50 reliable?

The only engine of the MINI Cooper R50 that we have documented, the 1.4 D-4D, has high or critical severity faults in the versions it is fitted to. Our verdict for the versions it is fitted to: «With caution». Outside the engine, the Mini Cooper R50 accumulates in the fiches-auto.fr reports faults in the power steering (rack and pump), the gearbox and clutch, the electric windows and the suspension. We have found no official campaigns for systems other than the engine.

What problems does the MINI Cooper R50 have apart from the engine?

Outside the engine, the Mini Cooper R50 accumulates in the fiches-auto.fr reports faults in the power steering (rack and pump), the gearbox and clutch, the electric windows and the suspension. We have found no official campaigns for systems other than the engine. The most important documented faults are: power steering rack and pump failure (steering, high severity), faults in the CVT automatic gearbox, the manual gearbox and the clutch (gearbox and clutch, high severity), wear of the suspension bushes, ball joints and arms (suspension, medium severity) and electric window failure (electrical system, low severity).[2][6]

What faults does the MINI Cooper R50 have?

The most important by severity and frequency, on the engines we have documented, are: turbocharger failure (1.4 D-4D, high severity), injector wear and failure (1.4 D-4D, medium severity), clogged diesel particulate filter (DPF) (1.4 D-4D, medium severity), premature clutch and dual-mass flywheel wear (1.4 D-4D, medium severity) and EGR valve clogged with soot (1.4 D-4D, medium severity).

What is the best year to buy a MINI Cooper R50?

According to our rating by year, the best are 2002 and 2001 (5.4/10); the worst rated is 2003 (5.3/10). Each year's rating counts only the engines sold that year and the faults that affect those units: open each year to see what changes.

Sources

Every fact on this page links to its source. If you find an error, let us know.

  1. Toyota Yaris (1999-2005) : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  2. Mini Mini (2001-2006) : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  3. Toyota Yaris 2 (2005-2011) : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  4. Toyota Corolla (2002-2007) : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  5. Toyota Auris (2007-2012) : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
  6. Mini HatchWikipedia (inglés) · Other source · consulted 5 October 2026
  7. Mini (BMW)Wikipedia (alemán) · Other source · consulted 27 September 2026 · in German
  8. Mini One DWikipedia · Other source · consulted 27 September 2026