Peugeot 604 I
Model overview
A comfortable, distinctive classic executive sedan whose present condition matters more than its age-related reputation. Corrosion, electrical ageing and neglected mechanical systems are the main ownership considerations.
Pros
- Comfortable and spacious sedan.
- Distinctive classic character.
- Petrol and diesel engine choices.
Cons
- Corrosion can be extensive.
- Electrical and trim issues reflect age.
- Specialist parts and repairs may take effort.
Common problems & ownership concerns
Potential impact: Low · Medium · High. This describes possible consequences, not fault likelihood.
- Structural and body corrosionHigh
- Ageing electrical and trim systemsMedium
- Suspension, steering and braking wearHigh
Maintenance
Follow the fitted engine’s service requirements and confirm procedures against the vehicle’s manual and VIN-specific specification.
Engine overview · 2.5L 4-cyl DIESEL
A condition-dependent classic turbo-diesel: potentially durable with disciplined servicing, but cooling, fuel and turbo systems need close attention after decades of use.
Pros
- Generally serviceable period diesel layout.
Cons
- Age-related cooling and fuel-system deterioration.
- Specialist turbo-diesel parts may be harder to source.
- Vehicle condition varies widely.
Common problems & ownership concerns
Potential impact: Low · Medium · High. This describes possible consequences, not fault likelihood.
- Cooling-system and cylinder-head stressHigh
- Turbocharger lubrication and boost-system wearMedium
- Diesel injection and cold-start equipment ageingMedium
- Fuel-system seal and hose deteriorationMedium
Maintenance
Use the period specification and engine-specific service guidance; maintain oil, coolant, filters and fuel-system components carefully.
These are general ownership concerns, not a diagnosis. Equipment and engine details vary by version and production date.
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