BMW 3 Series E21 320
Model overview
The E21 is a simple, enjoyable classic, but ownership condition matters more than age-related reputation. Corrosion, previous repairs and varied equipment are central considerations across its four- and six-cylinder petrol versions.
Pros
- Engaging rear-wheel-drive handling
- Straightforward mechanical layout
- Distinctive classic styling
Cons
- Rust can be costly
- Limited modern refinement and safety
- Condition varies widely
Common problems & ownership concerns
Potential impact: Low · Medium · High. This describes possible consequences, not fault likelihood.
- Structural corrosion in body and chassisHigh
- Ageing electrical systems and cabin trimMedium
- Suspension, steering and brake wearMedium
- Cooling and fuel-system deteriorationMedium
Maintenance
Follow manual or VIN-specific servicing for the fitted engine and inspect ageing hoses, seals, brakes and rubber components regularly.
Engine overview · 2.0L 6-cyl PETROL
The E21 2.0-litre petrol six is a smooth, accessible classic BMW engine, but examples are now heavily condition-dependent. Exact engine specification and evidence of age-related maintenance are important.
Pros
- Smooth naturally aspirated six-cylinder character.
- Straightforward mechanical layout.
- Manual and automatic applications available.
Cons
- Cooling and sealing systems are now age-sensitive.
- Fuel-system condition varies between applications.
- Service history may be incomplete on surviving cars.
Common problems & ownership concerns
Potential impact: Low · Medium · High. This describes possible consequences, not fault likelihood.
- Age-sensitive timing-belt service on applicable six-cylinder enginesHigh
- Cooling-system ageingHigh
- Carburettor and fuel-system wear on applicable 320 variantsMedium
- Oil leaks from ageing seals and gasketsLow
Maintenance
Confirm the engine code and follow its period BMW service requirements, including documented belt, cooling-system, valve-clearance and fuel-system maintenance where applicable.
These are general ownership concerns, not a diagnosis. Equipment and engine details vary by version and production date.
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