Bmw 7 Series Years to AvoidThe weakest years — and the one you should buy instead
After reviewing every Bmw 7 Series we've analyzed (8 years), these are the 8 weakest. Each one has either an absolute low reliability score, chronic repair issues, or unusually high ownership costs relative to other 7 Series years.
Proceed with caution
1982 Bmw 7 Series
Owning a 1982 BMW 7 Series is a commitment to classic European luxury and driving dynamics, but make no mistake, this era of BMW requires deep pockets and an enthusiast's dedication. It's not a rational daily driver purchase; it's a project car masquerading as a classic, promising significant repair expenditures, primarily in electrical systems and rust remediation, to keep its sophisticated systems operational.
Why this year scores low
The complex electrical systems of the E23 are notorious for failures. Issues include instrument cluster 'coding plug' battery leaks, SI board failures, power window motors, central locking actuators, climate control units, fuel pumps, and general wiring harness degradation from age, leading to intermittent or complete failure of critical components.
E23 models, especially those in regions with road salt, are highly susceptible to rust. Common areas include rocker panels, rear wheel arches, front fender bottoms, rear shock towers, battery trays, fuel tank area, floor pans, and around window seals. Structural integrity can be compromised, and repairs are extensive.
The M30 engine, while robust, suffers from aging cooling system components. Radiators, water pumps, hoses, and thermostats are prone to failure. Head gasket leaks are common after years of heat cycles, especially if the cooling system hasn't been meticulously maintained, leading to costly engine repairs.
Proceed with caution
1983 Bmw 7 Series
The 1983 BMW 7 Series is a highly aspirational classic luxury sedan that demands dedicated stewardship, not just ownership. While offering a rewarding driving experience from its era, it presents a complex web of age-related issues, making it a high-risk proposition for anyone unprepared for significant, ongoing maintenance.
Why this year scores low
Aging wiring, corroded grounds, and failing relays lead to intermittent issues with power windows, central locking, dashboard instrumentation, and the climate control system. Diagnosis is often time-consuming and expensive.
Common in critical areas such as rocker panels, wheel arches, rear shock towers, battery trays, and around the sunroof. Neglected rust can severely compromise structural integrity and resale value.
Forty years of ethanol-blended fuels can wreak havoc on original rubber fuel lines, fuel pumps, and injectors. Leaks, poor running, and starting issues are widespread, posing a fire risk.
Proceed with caution
1986 Bmw 7 Series
The 1986 BMW 7 Series (E23) is a formidable classic luxury sedan that demands a dedicated owner; this isn't a car for the faint of heart or light of wallet. While offering an unparalleled driving experience and build quality for its era, expect significant ongoing maintenance and occasional expensive repairs to keep this vintage German cruiser on the road. Proceed only if you're an enthusiast ready for a commitment.
Why this year scores low
The complex electrical systems are prone to failures due to aging wiring harnesses, corroded contacts, and failing relays. Issues include inoperative power windows, central locking, instrument cluster glitches, OBC (On-Board Computer) malfunctions, and HVAC system failures.
Plastic and rubber components within the cooling system degrade over time, leading to radiator end tank cracks, hose ruptures, water pump failures, and thermostat housing leaks. Neglect often results in notorious M30 engine head gasket failure.
These vehicles are highly susceptible to rust, particularly in the rocker panels, wheel arches, jacking points, battery tray, and around the sunroof drains. Hidden structural rust can compromise safety and value.
Proceed with caution
1980 Bmw 7 Series
The 1980 BMW 7 Series (E23) is a captivating classic, offering a unique blend of luxury and driving dynamics from its era. However, it demands a significant commitment in terms of time, expertise, and financial resources, making it a high-risk proposition for anyone not fully prepared for the challenges of vintage German luxury car ownership. Proceed with extreme caution; this vehicle is not for the faint of heart or light of wallet.
Why this year scores low
The complex electrical system, including power windows, central locking, instrument cluster, and various sensors (e.g., fuel level, temperature), suffers from wiring harness degradation, poor grounds, and component failures due to age and heat cycles. Diagnosing these intermittent issues is notoriously difficult and time-consuming.
These vehicles are highly susceptible to rust, particularly in structural areas like rocker panels, wheel arches, jacking points, subframe mounting areas, floor pans, and around the fuel tank. Salt exposure accelerates this significantly, often leading to hidden structural compromises that are costly to repair properly.
Years of fuel exposure and environmental factors cause fuel lines to become brittle, injectors to clog or leak, and the fuel pump and sender units to fail. Vapor lock issues and difficulty starting can also arise from aged components and vacuum leaks, leading to potential fire hazards if not addressed.
Proceed with caution
1984 Bmw 7 Series
The 1984 BMW 7 Series, specifically the E23 chassis, is a grand classic that demands deep pockets and a strong commitment to maintenance. While offering a truly engaging driving experience and period luxury, neglecting its specific age-related vulnerabilities will quickly transform this elegant machine into an expensive, frustrating garage ornament. Prepare for consistent investment, or look elsewhere.
Why this year scores low
The On-Board Computer (OBC), instrument cluster, power windows, central locking, and climate control servos frequently fail due to aging wiring harnesses, corroded contacts, and worn out modules. This often manifests as intermittent functionality or complete failure of luxury features.
Plastic components within the cooling system, such as the radiator end tanks and thermostat housing, become brittle with age and heat cycling, leading to cracks, leaks, and potential catastrophic overheating. Water pumps and radiators are also prone to failure.
Common rust areas include rocker panels, rear wheel arches, battery tray, sunroof surrounds, jacking points, and front strut towers. This is primarily due to inadequate rustproofing by modern standards and exposure to road salt/moisture over decades.
Proceed with caution
1981 Bmw 7 Series
The 1981 BMW 7 Series (E23) is a compelling classic luxury sedan, but it demands a dedicated owner with deep pockets and a strong mechanical aptitude. While offering an exceptional driving experience for its era, its inherent complexity and advanced age mean it is consistently prone to systemic failures and requires meticulous, often expensive, preventative maintenance to remain a reliable runner. This is not a vehicle for the faint of heart or those seeking cheap transportation.
Why this year scores low
Wiring harnesses degrade, leading to intermittent failures in lighting, power windows, central locking, and the 'check panel' warning system. Instrument cluster capacitors also fail, causing gauge inaccuracies.
The E23 is highly susceptible to rust, particularly in the rocker panels, wheel arches, front fenders, battery tray, and around the sunroof drains. This compromises structural integrity and aesthetic value.
Original rubber hoses, water pumps, radiators, and fuel system components (pump, lines, injectors) are well past their service life. Failures here lead to overheating or fuel delivery problems, risking severe engine damage.
Proceed with caution
1985 Bmw 7 Series
The 1985 BMW 7 Series (E23) is a passion purchase, not a pragmatic one. While offering a truly engaging driving experience and classic luxury, its inherent complexity for the era, combined with four decades of age, means it will demand significant financial and mechanical commitment. Proceeding with caution is paramount; neglect will lead to a very expensive, frustrating ownership experience.
Why this year scores low
The E23's 'advanced' electronics, including the On-Board Computer (OBC), power windows, central locking, and instrument cluster, suffer from aging wiring harnesses, brittle solder joints, and component failures. This leads to intermittent faults, non-functional displays, and parasitic drains.
Plastic and rubber components like the radiator, water pump, hoses, and thermostat housing become brittle and prone to failure. Neglecting these can lead to chronic overheating, which in turn can warp the aluminum cylinder head, causing catastrophic head gasket failure.
Despite good initial rust proofing, common trouble spots include rocker panels, rear wheel arches, battery tray, jacking points, and around the fuel filler. Structural rust can render the vehicle unsafe or uneconomical to repair.
Proceed with caution
1987 Bmw 7 Series
The 1987 BMW 7 Series (E32) is a testament to classic German engineering, offering a robust mechanical foundation wrapped in a luxurious, driver-focused package. While its M30 engine and ZF transmission are durable, the vehicle's age and complex-for-the-era electronics present significant maintenance challenges and a moderate risk of costly repairs. Only proceed if you are a dedicated enthusiast with a healthy repair budget and a willingness to understand its unique needs.
Why this year scores low
Wiring harness degradation, failed modules (OBC, central locking), window regulators, and sensor failures are common due to age and heat cycling. This can lead to intermittent issues that are difficult and expensive to diagnose.
Plastic components (radiator end tanks, thermostat housing, expansion tank) become brittle and prone to cracking. Water pumps, hoses, and radiator failures lead to overheating, which can damage the engine. Neglect is catastrophic.
Rubber bushings in control arms, subframe mounts, and tie rods degrade over time, leading to vague steering, clunking noises, and poor handling. Power steering pump and hose leaks are also common.