1990 BMW M5 Reliability ReportKeepScore 62/100 · top failure points · buy or avoid
Quick Facts · 1990 BMW M5
- Scores 10 points below the strongest nearby year — the 1989 BMW M5 earns a 72.
- The system most likely to surface first: engine (s38b36) (major severity).
- Has 1 NHTSA recall on record — the most notable involves the engine and engine cooling:cooling system.
1990 BMW M5: Buy or Avoid?
The 1990 BMW M5 is a highly desirable performance classic, but it comes with a significant reliability caveat due to its age and high-performance nature. Expect substantial investment in maintenance and repairs; this is not a car for the faint of heart or light of wallet. Ownership is a labor of love, requiring commitment to truly enjoy its legendary driving dynamics.
This M5 is a masterpiece of automotive engineering from its time, delivering an unmatched driving experience. However, it demands a significant financial and time commitment to own and maintain. Purchase only if you have a substantial budget for upkeep, a trusted specialist, or strong DIY skills. This is a passion p…
Best Model Years
For the S38B36 engine, 1989-1993 models are very similar, with condition being far more important than a specific year. Later S38B38 (1992-1995 for ROW) offer more power but share similar core maintenance needs.
Years to Avoid
No specific years to avoid for the E34 M5; focus solely on an individual car's documented maintenance history and current condition.
Biggest Strengths
- Robust S38B36 engine (if meticulously maintained)
- Excellent Getrag 280 manual transmission durability
- Timeless design and outstanding driving dynamics
1990 BMW M5 — Known Trouble Spots
The systems that tend to fail first on the 1990 BMW M5, with the typical mileage window when each becomes a concern. Detailed repair-cost ranges and exact what-to-check inspection notes are in the full report.
Oil leaks from valve covers and front timing cover, requiring gasket replacement. Regular valve adjustments are critical; neglected adjustments lead to valve train wear. Fuel system components (injectors, pump, lines) are aging and prone…
Aging wiring harnesses become brittle, leading to shorts or open circuits. Common failures include instrument cluster pixel loss, window regulators, central locking modules, and various relays (fuel pump, main relay). Sensors throughout…
Due to age and performance demands, control arm bushings, tie rod ends, sway bar links, and shock absorbers are almost certainly worn out, leading to loose handling and clonking noises. Steering box play is common, affecting precision.
1990 BMW M5 Mileage Danger Zones
The mileage windows when the 1990 BMW M5 most commonly needs attention. Plan ahead, budget accordingly, and inspect before you cross each threshold.
Low Risk Zone
At this mileage, provided the car has been driven regularly and properly maintained, it's relatively fresh. Focus on verifying routine service history and addressing any minor age-related issues from sitting.
Maintenance Zone
This mileage typically marks the need for the first major round of wear-item replacements. Expect suspension bushings, belts, hoses, and possibly brake components to require attention. Valve adjustments are due.
Elevated Risk Zone
Beyond 90k, the risk of significant component failures rises. Electrical gremlins become more prevalent, and major engine items like the fuel system or even a clutch replacement might be necessary. A comprehensive 'reset' is often needed.
High Risk Zone
Cars at this mileage have likely endured years of wear. If maintenance has been neglected, major engine or transmission overhauls are possible. A significant upfront investment will be required to bring the car back to reliable condition.
1990 BMW M5 Ownership Cost Outlook
What it typically costs to keep the 1990 BMW M5 on the road. Full 5-year cost-of-ownership projection and major-failure-risk forecast are in the report.
Annual Maintenance
$1,500-3,000 (for an enthusiast-owned, well-maintained example)
Moderate Repairs
$1,000-3,000 per incident (e.g., suspension refresh, fuel system overhaul) occasionally
How Long Does the 1990 BMW M5 Last?
While high-mileage M5s can still be excellent drivers, be prepared for substantial upfront costs to refresh worn components. Low-mileage examples may have issues from prolonged storage (dried seals, seized components), so condition and comprehensive service history always trump odometer readings.
What 1990 BMW M5 Owners Actually Say
What Owners Love
- Exceptional driving dynamics and chassis balance for a sedan.
- Glorious, high-revving S38 inline-six engine sound and power delivery.
- Timeless, understated 'sleeper' styling that ages gracefully.
- High-quality interior materials and excellent ergonomic design.
Common Frustrations
- Extremely high maintenance and repair costs, requiring specialist knowledge.
- Parts availability for specific M5 components can be challenging and expensive.
- Frequent electrical gremlins (e.g., OBC pixels, window regulators).
- Poor fuel economy, especially when driven enthusiastically.
Who Should Buy the 1990 BMW M5?
Best For
- Dedicated BMW enthusiasts and collectors
- Drivers seeking an analogue, involving performance sedan
- Individuals with a strong mechanical aptitude and DIY capability
Not Ideal For
- Budget-conscious buyers seeking affordable performance
- Those who need a truly reliable daily driver without unexpected repairs
How the 1990 BMW M5 Compares to Rivals
The E34 M5 offers a more visceral, analogue driving experience than many of its luxury sedan contemporaries. While its reliability is not on par with Japanese luxury cars, it holds up reasonably well for a high-strung German performance car of its era, provided maintenance is…
More Reliable Than
- Mercedes-Benz 500E/E500 (W124) in terms of raw driver engagement and manual transmission option
- Audi S4 (C4) in terms of steering feel and engine character
Comparable To
- Lotus Carlton/Omega in terms of exclusivity and analogue performance, but with better parts availability
Safety Recalls on the 1990 BMW M5
1 recall on record from NHTSA. Check your VIN atnhtsa.gov to see if the repair was performed.
ENGINE AND ENGINE COOLING:COOLING SYSTEM
VEHICLE DESCRIPTION: PASSENGER VEHICLES. A MALFUNCTION OR FAILURE OF A COOLANT SYSTEM COMPONENT, SUCH AS A THERMOSTAT, WATER PUMP, OR FAN BELT, CAN RESULT IN SIGNIFICANTLY INCREASED COOLANT TEMPERATURE AND SYSTEM PRESSURE. IF THE INDICATIONS OF A CRITICAL OVERHEATING CONDITION IS NOT NOTICED BY THE DRIVER, IT IS POSSIBLE THAT DAMAGE TO, OR FAILURE OF, A COOLANT SYSTEM COMPONENT COULD OCCUR.
What breaks on the 1990 BMW M5?
Full reliability breakdown — engine, transmission, rust, electrical. With repair costs and mileage danger zones.
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BMW M5 — Year-by-Year Comparison
Compare KeepScores across nearby years of the BMW M5. Click any year for its full report.
Competing 1990s Worth a Look
Similar class, similar year range — ranked by KeepScore.
Relevant Products for Your 1990 BMW M5
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Frequently Asked Questions
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