1991 Acura NSX Reliability ReportA- grade · low risk · system-by-system breakdown
Quick Facts · 1991 Acura NSX
- The system most likely to surface first: transmission (manual) (critical severity).
- Has 1 NHTSA recall on record — the most notable involves the seat belts:front:buckle assembly.
- Scores 3 points below the strongest nearby year — the 1992 Acura NSX earns a 92.
Is the 1991 Acura NSX Worth Buying?
The 1991 Acura NSX stands as a testament to Honda's engineering prowess, offering supercar performance with unprecedented daily usability and robust reliability. While over three decades old, its fundamental mechanicals are incredibly resilient, making it one of the safest classic supercar investments from a long-term ownership perspective. Don't be deterred by its age; a well-maintained NSX is a confident purchase that will provide years of exhilarating, dependable driving.
The 1991 Acura NSX is an automotive icon and a phenomenal choice for a classic sports car, offering unmatched reliability in its class. With diligent pre-purchase inspection and addressing a few key preventative maintenance items, particularly the manual transmission snap ring for early models, you'll own a truly sp…
Best Model Years
1997-2005 (later models, improved engine, 6-speed manual), but 1991-1994 are excellent after snap ring fix.
Years to Avoid
No specific years to outright avoid, but '91-'92 manual transmissions require due diligence on the snap ring issue.
Biggest Strengths
- Legendary Honda build quality and engineering principles applied to a supercar
- Robust C30A VTEC engine, capable of high mileage with proper care
- Corrosion-resistant aluminum body panels for long-term structural integrity
What Tends to Fail First on the 1991 Acura NSX
The systems that tend to fail first on the 1991 Acura NSX, 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.
Early 5-speed manual transmissions (1991-1992 models primarily) are susceptible to a 'snap ring' failure on the countershaft bearing. If neglected, this can lead to catastrophic transmission failure. It's a known design flaw that needs p…
The main fuel pump relay is a common failure point across many Honda/Acura vehicles of this era. Over time, solder joints crack, leading to intermittent starting issues, stalling, or no-start conditions, particularly in hot weather.
The plastic heater control valve under the cowl is prone to failure. It can either seize, causing no heat, or crack and leak coolant, leading to overheating if not caught promptly. Replacing it is a moderate task but essential.
1991 Acura NSX Mileage Danger Zones
The mileage windows when the 1991 Acura NSX most commonly needs attention. Plan ahead, budget accordingly, and inspect before you cross each threshold.
Low Risk Zone
At this mileage, an NSX is typically still very fresh. Focus on ensuring all fluids are current, tires aren't aged out, and that the original owner followed basic service schedules.
Maintenance Zone
This mileage marks critical preventative maintenance. The timing belt, water pump, and spark plugs are due. For early manual transmissions, this is also the ideal time to address or confirm the snap ring fix.
Elevated Risk Zone
Beyond routine maintenance, electrical components like the main relay become more prone to failure. Suspension bushings may start to show significant wear, affecting ride quality and handling. More intensive checks are needed.
High Risk Zone
While many NSXs run flawlessly past this point, age-related wear on nearly all rubber and plastic components becomes more pronounced. Expect to replace various hoses, seals, and potentially major electrical components if not already done.
1991 Acura NSX Ownership Cost Outlook
What it typically costs to keep the 1991 Acura NSX 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 (excluding major services)
Moderate Repairs
$1,000-3,000 occasionally (e.g., clutch, suspension refresh, snap ring fix)
How Long Does the 1991 Acura NSX Last?
Focus less on total mileage and more on comprehensive service history. A high-mileage NSX with diligent maintenance is often a safer bet than a low-mileage 'garage queen' that has suffered from neglect or prolonged storage.
What 1991 Acura NSX Owners Actually Say
What Owners Love
- Incredible driving dynamics, communicative steering, and sublime balance
- Remarkable reliability for a high-performance vehicle of its age, especially compared to rivals
- Timeless design that still turns heads and holds its own aesthetically
- Comfortable and relatively practical cockpit for a mid-engine supercar
Common Frustrations
- Parts can be expensive and specialized, requiring knowledge beyond a typical mechanic
- Limited storage space, as expected for a mid-engine car
- Lack of modern amenities (Bluetooth, navigation, advanced safety)
- Some interior plastics and rubber seals will show significant age
Who Should Buy the 1991 Acura NSX?
Best For
- Enthusiasts seeking a classic supercar with daily drivability and low breakdown risk
- Collectors looking for a strong investment with a rich racing pedigree
- Drivers who prioritize driving purity, handling, and engine sound over modern tech
Not Ideal For
- Budget-conscious buyers expecting Honda Civic-level running costs
- Those who need modern creature comforts, advanced safety systems, or infotainment
How the 1991 Acura NSX Compares to Rivals
The NSX carved a unique niche, offering supercar performance with Japanese reliability, easily outperforming European rivals of its era in terms of build quality and long-term dependability, albeit with slightly less 'exotic' flair for some.
More Reliable Than
- Ferrari 348 (significantly more reliable, lower running costs, better daily drivability)
- Lotus Esprit (vastly superior build quality, less prone to electrical gremlins)
- Dodge Viper RT/10 (more refined, safer handling, much better interior ergonomics)
Comparable To
- Porsche 964 911 (similar level of daily usability, iconic status, dedicated owner community)
- Chevrolet Corvette C4 ZR-1 (comparable performance and specialized engineering, though less refined)
1991 Acura NSX Recall History
1 recall on record from NHTSA. Check your VIN atnhtsa.gov to see if the repair was performed.
SEAT BELTS:FRONT:BUCKLE ASSEMBLY
THE FRONT SAFETY BELT BUCKLE RELEASE BUTTONS CAN BREAK. THESE RED PLASTIC RELEASE BUTTONS ARE MARKED "PRESS." IF A BUTTON BREAKS, PIECES CAN FALL INTO THE BUCKLE ASSEMBLY CAUSING THE BUCKLE TO OPERATE IMPROPERLY.
What breaks on the 1991 Acura NSX?
Full reliability breakdown — engine, transmission, rust, electrical. With repair costs and mileage danger zones.
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Other Acura NSX Years to Consider
Compare KeepScores across nearby years of the Acura NSX. Click any year for its full report.
1991 Acura NSX Alternatives
Similar class, similar year range — ranked by KeepScore.
Relevant Products for Your 1991 Acura NSX
Parts and accessories matched to your 1991 Acura NSX
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Frequently Asked Questions
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