2018 BMW M5 Reliability ReportCommon Problems, Repair Costs & Expert Verdict
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Quick Facts · 2018 BMW M5
- Has 3 NHTSA recalls on record — the most notable involves the electrical system:software.
- Outscores the 2017 BMW M5 by 16 points — one of the stronger nearby years to consider.
- The system most likely to surface first: engine gaskets & seals (moderate severity).
The 2018 BMW M5 at a glance
- Is the 2018 BMW M5 reliable?
- Autojunket rates the 2018 BMW M5 78/100 (grade B-), categorized as moderate risk. A beast of a machine that requires a significant budget and proactive ownership to truly thrive.
- Should I buy a used 2018 BMW M5?
- Autojunket recommends reading the full reliability report before buying a 2018 BMW M5. The 2018 BMW M5 is an absolutely incredible machine for the driving enthusiast, delivering unmatched performance and luxury. However, it requires a significant financial commitment for preventative maintenance and potential repairs. Proceed with caution, ensure you have a robust budget for upkeep, and commit to proa…
- Which BMW M5 years are the most reliable?
- Best model years to buy: 2018-2023 (F90 generation is generally well-regarded). Years to avoid: None specifically for the F90 M5, but always favor well-maintained examples regardless of year..
- What are the most common problems with the 2018 BMW M5?
- The top failure points on the 2018 BMW M5 are Engine Gaskets & Seals (typically around 50,000-80,000 miles), Electronic Modules & Sensors (typically around 40,000-70,000 miles), Adaptive Suspension Components (typically around 70,000-100,000 miles). Autojunket's full report includes repair-cost ranges and inspection checklists for each.
- At what mileage do problems start on the 2018 BMW M5?
- The first major mileage danger zone for the 2018 BMW M5 is around 30,000. Initial Wear Checkpoint — At this mileage, the M5 should still feel fresh, but it's crucial to check for premature wear on tires and brakes, especially if the previous owner was aggressive. Fluid checks are also essential.
Every answer is generated from real repair, recall, and ownership data — full breakdown in the report.
Read the full free reportShould You Buy the 2018 BMW M5?
The 2018 BMW M5 is a formidable performance sedan that offers exhilarating power and luxury, but it demands diligent maintenance and a robust repair budget. While fundamentally well-engineered, its intricate high-performance systems mean that any repairs can be significantly expensive. This is a car for those who prioritize driving dynamics and are prepared for the commitment of owning a modern M car.
The 2018 BMW M5 is an absolutely incredible machine for the driving enthusiast, delivering unmatched performance and luxury. However, it requires a significant financial commitment for preventative maintenance and potential repairs. Proceed with caution, ensure you have a robust budget for upkeep, and commit to proa…
Best Model Years
2018-2023 (F90 generation is generally well-regarded)
Years to Avoid
None specifically for the F90 M5, but always favor well-maintained examples regardless of year.
Biggest Strengths
- Robust core engine (S63B44T4) if meticulously maintained
- Highly durable ZF 8-speed automatic transmission
- Exceptional build quality and material choices in the cabin
Top Risk Areas
The systems that tend to fail first on the 2018 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.
Due to high engine temperatures and heat cycles, valve cover gaskets, oil pan gaskets, and turbocharger oil lines can develop leaks. These are not catastrophic but require significant labor to access and replace.
The M5's extensive electronics suite, including iDrive, adaptive suspension, and various powertrain sensors, can experience intermittent glitches or outright failures. Diagnostics are complex and replacement modules are costly.
The electronically controlled adaptive dampers and associated sensors are wear items. Failure results in a harsh ride, error messages, and expensive component replacement for a smooth ride.
2018 BMW M5 Mileage Danger Zones
The mileage windows when the 2018 BMW M5 most commonly needs attention. Plan ahead, budget accordingly, and inspect before you cross each threshold.
Initial Wear Checkpoint
At this mileage, the M5 should still feel fresh, but it's crucial to check for premature wear on tires and brakes, especially if the previous owner was aggressive. Fluid checks are also essential.
Proactive Maintenance Zone
This mileage marks the point where more significant maintenance items become due. Expect to address spark plugs, filters, and potentially initial gasket leaks or control arm bushing wear. Transmission fluid service is highly recommended…
Elevated Component Risk Zone
Beyond 90,000 miles, the M5 may start requiring replacement of more expensive components like adaptive dampers, VANOS solenoids, or even potentially the HPFP. Thorough pre-purchase inspection is paramount.
High Risk / Deep Commitment Zone
At this mileage, owning an M5 becomes a commitment to significant potential repair costs. Expect to tackle major suspension overhaul, potential turbocharger issues, and ongoing electronic or sensor replacements. A comprehensive service h…
2018 BMW M5 Ownership Cost Outlook
What it typically costs to keep the 2018 BMW M5 on the road. Full 5-year cost-of-ownership projection and major-failure-risk forecast are in the report.
Annual Maintenance
$1,000-2,000
Moderate Repairs
$1,500-4,000 occasionally
How Long Does the 2018 BMW M5 Last?
For maximum peace of mind, aim for a 2018 M5 with less than 60,000 miles, ideally with a comprehensive service history from a BMW dealer or reputable independent specialist. Be prepared for a substantial increase in maintenance costs after 75,000 miles.
What 2018 BMW M5 Owners Actually Say
What Owners Love
- Phenomenal performance and acceleration that genuinely thrills
- Luxurious, high-quality interior with excellent comfort for a performance car
- Advanced technology and infotainment features (when working correctly)
- Refined ride quality that can be surprisingly comfortable for daily driving
Common Frustrations
- Extremely high cost of ownership, especially for parts and labor
- Rapid wear of expensive performance tires and brake components
- Frequent small electronic glitches or sensor issues can be frustrating
- Fuel economy is poor, even for a high-performance V8
Who Should Buy the 2018 BMW M5?
Best For
- Performance enthusiasts who value raw power and exceptional handling
- Individuals with a substantial discretionary budget for maintenance and repairs
- Drivers who appreciate luxurious interiors paired with track-capable performance
Not Ideal For
- Budget-conscious buyers seeking low running costs
- Owners who prefer to defer maintenance until absolutely necessary
How the 2018 BMW M5 Compares to Rivals
The M5 holds its own against key rivals, often surpassing them in raw driving feel and engagement. Its reliability is comparable to other high-performance German sedans, meaning it's generally robust but expensive to maintain, though perhaps slightly more reliable than its dir…
More Reliable Than
- Mercedes-AMG E63 (some model years for overall electronics reliability)
- Audi RS6/RS7 (for transmission robustness)
- Cadillac CTS-V (for interior quality and overall refinement)
Comparable To
- Mercedes-AMG E63 (W213 generation for performance and complexity)
NHTSA Recalls
3 recalls on record from NHTSA. Check your VIN atnhtsa.gov to see if the repair was performed.
ELECTRICAL SYSTEM:SOFTWARE
BMW of North America, LLC (BMW) is recalling certain 2018 BMW M5 vehicles. In certain driving conditions, the engine control unit software may cause the fuel pump to stop.
BACK OVER PREVENTION: SENSING SYSTEM: CAMERA
BMW of North America, LLC (BMW) is recalling certain 2018 540d, 2018-2020 530i, 530i xDrive, 540i, 540i xDrive, M550i xDrive, M5, 530e, 530e xDrive, X3 sDrive, X3 xDrive, X3 M40i, X3 M, and 2019-2020 X4 xDrive, X4 M40i, X4 M, X7 xDrive, X7 M50i, 740Li, 740Li xDrive, 750Li, 750Li xDrive, 8 Series Convertible and Coupe 840i, 840i xDrive, M850i xDrive, X5 sDrive, X5 xDrive, X5 M50i, X6 xDrive, X6 M50i, 330i, 330i xDrive, M340i, M340i xDrive, Z4 sDrive, Z4 M40i, 740Le xDrive and 745Le xDrive, 2018-2019 640i xDrive Gran Turismo and Rolls-Royce Phantom, 2019 M850i xDrive Gran Coupe and Rolls-Royce Cullinan and 2020 Toyota Supra vehicles. The back-up camera and display settings can be adjusted such that the rear view image is no longer visible and the system will retain that setting the next time the vehicle is placed in reverse. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 111, "Rearview Mirrors."
What breaks on the 2018 BMW M5?
Full reliability breakdown — engine, transmission, rust, electrical. With repair costs and mileage danger zones.
Autojunket OSC · OSC Transfer
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BMW M5 by Year
Compare AutoScores across nearby years of the BMW M5. Click any year for its full report.
If You're Considering This, Also Look At
Similar class, similar year range — ranked by AutoScore.
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Where the 2018 BMW M5 report beats Carfax + CR
Carfax tells you if it crashed. Consumer Reports rates the whole nameplate. Autojunket tells you what will actually break on this specific year — and how to negotiate it.
Year-specific reliability score
Common problems + repair costs
Mileage danger zone map
AI negotiation script + walk-away price
Single report price
Frequently Asked Questions
Related Comparisons
Sell your 2018 BMW M5 for what it's actually worth.
Log every service on your BMW M5. When it's time to sell, hand the buyer a signed PDF — every receipt, mileage-verified, close the deal at your price.
- OSC Transfer PDF — every receipt
- Snap-a-receipt AI log
- Fuel & mileage tracker
- Shareable buyer view link
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