BMW 7 Series E23 728
Model overview
A refined classic sedan whose ownership quality depends heavily on corrosion, restoration standard, service records and the exact six-cylinder specification fitted.
Pros
- Comfortable, spacious classic BMW sedan.
- Smooth six-cylinder petrol character.
- Strong enthusiast and parts knowledge.
Cons
- Rust and age-related deterioration can be extensive.
- Electrical and luxury equipment may need restoration.
- Specifications vary substantially by year and market.
Common problems & ownership concerns
Potential impact: Low · Medium · High. This describes possible consequences, not fault likelihood.
- Body corrosion in structural and panel areasHigh
- Ageing electrical and interior equipmentMedium
- Suspension and steering wearMedium
Maintenance
Follow the installed engine’s documented schedule and verify coolant, belt, hose and fluid history by VIN and engine code.
Engine overview · 2.8L 6-cyl PETROL
A robust historic BMW straight-six, but condition varies widely. Cooling-system health, timing-chain maintenance and the distinction between carburetted 728 and fuel-injected 728i are central to ownership.
Pros
- Smooth, durable inline-six design.
- Good access for routine mechanical servicing.
- Manual and automatic applications were available.
Cons
- Many components are now affected by age rather than mileage.
- Carburetted 728 and fuel-injected 728i versions need different servicing approaches.
- Overheating history can be costly.
Common problems & ownership concerns
Potential impact: Low · Medium · High. This describes possible consequences, not fault likelihood.
- Cooling-system age and overheatingHigh
- Timing-chain, guide and tensioner wearHigh
- Oil leaks and hardened engine sealsMedium
- Carburettor or fuel-injection age-related faultsMedium
Maintenance
Follow the exact vehicle's BMW service information and establish a baseline for fluids, hoses, ignition and cooling-system components.
These are general ownership concerns, not a diagnosis. Equipment and engine details vary by version and production date.
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