2003 MINI Cooper problems
The 2003 MINI Cooper was sold with an engine that we have documented: the 1.4 D-4D. The 1.4 D-4D has serious faults that affect the cars of that year. Outside the engine, 4 documented faults affect 2003 cars, such as power steering rack and pump failure.
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2003 MINI Cooper score: acceptable reliability
Calculated using only 9 documented faults and their sources: the most serious and frequent faults weigh more. 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
What changes compared with the 2002 MINI Cooper
- Score: 5.4 → 5.3
- New engines or gearboxes: 1.4 D-4D
- Starts to be affected by: turbocharger failure (1.4 D-4D), injector wear and failure (1.4 D-4D), clogged diesel particulate filter (DPF) (1.4 D-4D) and premature clutch and dual-mass flywheel wear (1.4 D-4D) and 1 more
1.4 D-4D engine in the 2003 MINI Cooper
Names: One D
- With caution
1.4 D-4D 75 (1ND-TV, 75 hp, 2002-2005)
75 hp · 1ND-TV
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.[3][4]
Faults that affect 2003 cars
- 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
- 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.
- 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.
- 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
- 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
Faults outside the engine in the 2003 MINI Cooper
- High severityFrequency: CommonSteeringPower steering rack and pump failureAccording to the reports collected by fiches-auto.fr, the steering on the Mini R50 is one of its most repeated faults: 27 mentions of a fragile rack (mostly before 2004) and another 27 of the power steering pump, with one pump case at 72,000 km.
- High severityFrequency: CommonGearbox and clutchFaults in the CVT automatic gearbox, the manual gearbox and the clutchAccording to the reports collected by fiches-auto.fr, the Mini R50 accumulates 22 gearbox mentions and 32 clutch mentions, and the CVT automatic variant is described as fragile and 'to be avoided'. Wikipedia confirms that the CVT and the manual gearboxes were fitted depending on the year.
- Medium severityFrequency: OccasionalSuspensionWear of the suspension bushes, ball joints and armsAccording to the reports collected by fiches-auto.fr, the Mini R50's suspension has 9 mentions of ball joints, 7 of arms and 5 of bearings, with wishbone bushes wearing out early (one case at 220,000 km).
- Low severityFrequency: OccasionalElectrical systemElectric window failureAccording to the reports collected by fiches-auto.fr, the electric windows on the Mini R50 have 16 mentions of malfunction. There is no known campaign or technical bulletin.
Buying a 2003 MINI Cooper?
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Frequently asked questions
Is the 2003 MINI Cooper reliable?
The 2003 MINI Cooper was sold with an engine that we have documented: the 1.4 D-4D. The 1.4 D-4D has serious faults that affect the cars of that year. Outside the engine, 4 documented faults affect 2003 cars, such as power steering rack and pump failure.
Is the 2003 MINI Cooper better than the 2002?
Our score goes from 5.4 in 2002 to 5.3 in 2003. Starts to be affected by: turbocharger failure (1.4 D-4D), injector wear and failure (1.4 D-4D) and clogged diesel particulate filter (DPF) (1.4 D-4D). 1.4 D-4D arrive.
What is the best year for the MINI Cooper?
According to our score, the best are 2002 and 2001 (5.4/10). The year with the worst score is 2003 (5.3/10). Each year's score counts only the engines sold that year and the faults that affect those cars.
What faults does the 2003 MINI Cooper have?
The most important ones documented for 2003 cars are: turbocharger failure (1.4 D-4D, high severity), 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), injector wear and failure (1.4 D-4D, medium severity) and clogged diesel particulate filter (DPF) (1.4 D-4D, medium severity).
Own a 2003 MINI Cooper? Tell us what faults you have had and at how many kilometres. Report your fault.
Sources
Every fact on this page links to its source. If you find an error, let us know.
- Mini (BMW)Wikipedia (alemán) · Other source · consulted 27 September 2026 · in German
- Mini One DWikipedia · Other source · consulted 27 September 2026
- Mini Mini (2001-2006) : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French
- Toyota Yaris (1999-2005) : fiabilité, pannes et rappelsFiches-auto.fr · Motoring press · consulted 27 September 2026 · in French