BMW 7 Series E23 745i
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 · 3.4L 6-cyl PETROL
A smooth, characterful older straight-six engine, but age, turbocharging and maintenance history are more important than the catalogue identity alone.
Pros
- Smooth straight-six character
- Strong period performance
- Established specialist support
Cons
- Age-related cooling and fuel-system deterioration
- Turbocharger heat and lubrication demands where fitted
- Condition varies widely between surviving cars
Common problems & ownership concerns
Potential impact: Low · Medium · High. This describes possible consequences, not fault likelihood.
- Ageing cooling-system componentsHigh
- Turbocharger oiling and heat managementHigh
- Timing-chain and tensioner wearMedium
- Fuel-injection, vacuum and ignition ageingMedium
Maintenance
Follow the market-specific manual and VIN-specific engine specification, with careful attention to cooling, turbo oil plumbing where fitted and timing-system condition.
These are general ownership concerns, not a diagnosis. Equipment and engine details vary by version and production date.
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