Generations
CA0 — Sixth Generation (Mirage-based)
2004–2012
1.1 MIVEC, 1.3 MIVEC, 1.5 MIVEC, 1.5 DI-D, 1.5 Turbo
CZT — CZT Performance
2004–2009
1.5 Turbo CZT
Z30 — Fifth Generation (pre-2004)
1996–2004
1.3, 1.6
Top issues to watch for
The most serious Mitsubishi Colt problems ranked by severity. We track 5 known issues — here are the ones you need to know about first.
Dangerous
Subframe mounting point corrosion (CA0)
The rear subframe mounting points on CA0 generation Colts are prone to severe corrosion that compromises structural integrity. MOT data shows this model fails at 49.5x the national fleet average for load-bearing structure defects around subframe mounting points. The issue affects all engine variants but is most severe on 1.3-litre models. This is a safety-critical defect that can lead to suspension component detachment and loss of vehicle control.
What happens if ignoredSevere corrosion of subframe mounting points is an MOT failure and renders the vehicle dangerous to drive. In extreme cases, suspension components can detach completely leading to loss of control. Professional welded repair to structural areas typically costs £800-£1,500 but may not be economically viable on older examples.
Independent garage
£600–£1,200
Specialist
£800–£1,500
Main dealer
£1,000–£2,000
Parts only
£200–£400
Major
Rear suspension component failure (CA0)
Rear suspension bushes and joints on CA0 Colts deteriorate rapidly and can detach completely. MOT statistics show failure rates up to 49x the national average for suspension components becoming detached and 40.9x for joints likely to become detached. The problem is most severe on 1.1 and 1.3-litre variants. Dust covers also deteriorate at 32.8x the fleet average, accelerating joint wear by allowing dirt and water ingress.
What happens if ignoredWorn rear suspension bushes cause poor handling, excessive tyre wear, and MOT failure. Complete detachment of suspension components creates a dangerous driving situation. Replacement of rear bush sets typically costs £200-£400 plus labour. Individual components may detach during driving if severely worn.
Independent garage
£200–£400
Specialist
£250–£500
Main dealer
£300–£600
Parts only
£80–£150
Major
Flexible brake hose deterioration (CA0)
Flexible brake hoses on CA0 1.5-litre petrol Colts deteriorate at 22.9x the national fleet average, particularly in the 40-80k mile range. The rubber brake hoses become cracked, twisted or stretched, compromising brake performance. This appears to be specific to the 1.5-litre petrol variants and represents a significant safety concern affecting braking effectiveness.
What happens if ignoredDeteriorated brake hoses can lead to brake failure, representing a serious safety hazard. Flexible hoses that are twisted, cracked, or bulging will fail the MOT test. Complete hose failure results in total loss of braking to that wheel. Replacement of individual brake hoses costs £30-£60 per hose plus labour.
Independent garage
£80–£150
Specialist
£100–£180
Main dealer
£120–£220
Parts only
£30–£60
Major
CZT turbocharger oil seal failure
The Mitsubishi TD04 turbocharger fitted to CZT variants develops oil seal failure between 60-120k miles. The high-performance 1.5-litre turbocharged engine runs higher boost pressures than standard Colt variants, accelerating wear on turbo seals. Failed seals cause oil consumption, blue exhaust smoke, and eventual turbo bearing failure. This issue is specific to the performance CZT model and does not affect naturally aspirated variants.
What happens if ignoredFailed turbo oil seals lead to high oil consumption and eventual turbo bearing failure. A completely failed turbocharger costs £800-£1,500 to replace with a remanufactured unit. Continued driving with failed seals will destroy the turbo bearings and may cause oil starvation to the main engine. The car can be driven carefully to a repair facility but should not be used for daily driving.
Independent garage
£800–£1,200
Specialist
£1,000–£1,500
Main dealer
£1,200–£2,000
Parts only
£500–£800
1 more known issues tracked
Including wear items, electrical niggles, and generation-specific problems.
MOT failure hotspots
Based on DVSA MOT test data. These are the items where the Mitsubishi Colt fails at a significantly higher rate than the average car.
Anti-roll bar links worn
Suspension · 20-40k miles
MOT failure rate: 453x the fleet average
Sample: 1,744 tests
ABS fault
Suspension · 100-120k miles
MOT failure rate: 100x the fleet average
Sample: 172 tests
Suspension joint dust cover severely deteriorated
Suspension · 20-40k miles
MOT failure rate: 33x the fleet average
Sample: 4,928 tests
Emissions failure
Exhaust & Emissions · 60-80k miles
MOT failure rate: 33x the fleet average
Sample: 1,736 tests
Seat mounting fault
Seatbelts & Airbags · 40-60k miles
MOT failure rate: 31x the fleet average
Sample: 176 tests
Vehicle structure corroded to the extent that t...
Bodywork · 40-60k miles
MOT failure rate: 28x the fleet average
Sample: 415 tests
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Related
- Mitsubishi Colt buyer's guide
- Mitsubishi Colt service history check
- Mitsubishi Colt service schedule & costs
- Mitsubishi Colt MOT failure rates
- How to check Mitsubishi service history
- Buying a car without service history
- Mitsubishi Colt car check £7.49
- Free car faults check
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Mitsubishi Colt reliability FAQs
What are the most common problems with the Mitsubishi Colt?
The Mitsubishi Colt has 5 known issues across 3 severity levels. The most serious are: Subframe mounting point corrosion (CA0).
Is the Mitsubishi Colt reliable?
The Mitsubishi Colt has 1 dangerous and 3 major known issues. Most can be avoided with a thorough pre-purchase check and full service history.
How much does it cost to fix Mitsubishi Colt problems?
Repair costs range widely. The most significant issue (Subframe mounting point corrosion (CA0)) costs £600–£1,200 at an independent garage. Minor issues can be under £200. Always get a full inspection before buying.
Which Mitsubishi Colt generation is most reliable?
The CZT (2004–2009) has the fewest dangerous issues (0). However, condition and service history matter more than generation — a well-maintained earlier car can be more reliable than a neglected newer one.