Mazda · Known Issues
2001 Mazda MX-5 Miata Problems: 6 Known Issues
2001 model year · 13,300+ owner reports · Updated September 2026
2001 · All trims · All engines
Choose the year and equipment for your written issues and visual request.
2001 model year · 13,300+ owner reports · Updated September 2026
2001 · All trims · All engines
Choose the year and equipment for your written issues and visual request.
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According to Au7o's analysis of 13,300+ owner reports, the 2001 Mazda MX-5 Miata has 6 documented known issues, with 2 rated critical. The most serious are Crankshaft Position Sensor Failure (NB) ($50-$250 repair) and Clutch Slave Cylinder Piston Seal Leak - Sudden Loss of Clutch Release ($60-$400 repair). The most commonly reported issue is Soft Top Wear and Rear Window Delamination with 5,000 owner reports. Across all issues with published estimates, repair costs range from $50 to $1,500. DIY maintenance guides at au7o.io.
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According to Au7o's analysis of 13,300+ owner reports, the 2001 Mazda MX-5 Miata has 6 documented issues. The most frequently reported are: Crankshaft Position Sensor Failure (NB), Clutch Slave Cylinder Piston Seal Leak - Sudden Loss of Clutch Release, Soft Top Wear and Rear Window Delamination. Of these, 2 are rated critical and should be addressed promptly.
The 2001 Mazda MX-5 Miata has 6 known issues documented across 13,300+ owner reports. 2 issues are rated critical: Crankshaft Position Sensor Failure (NB) and Clutch Slave Cylinder Piston Seal Leak - Sudden Loss of Clutch Release. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
Repair costs for known Mazda MX-5 Miata issues range from $50 to $1,500, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, Crankshaft Position Sensor Failure (NB), typically costs $50-$250 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
The NB Miata (1999-2005) crankshaft position sensor (CPS) is a known failure point. The sensor deteriorates from engine heat, causing intermittent stalling, no-start conditions, and random misfires. Failure is often heat-related - the car runs fine when cold but stalls or dies af… Repairs typically run $50-$250. Severity: high.
The externally mounted clutch slave cylinder on NA/NB/NC Miatas fails at the piston seal. Fluid weeps past the seal and collects behind the rubber boot, then the cylinder stops holding pressure and the pedal drops to the floor with no gear engagement - frequently without warning. Repairs typically run $60-$400. Severity: high.
Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.
Miata soft tops deteriorate over time from UV exposure, flexing during operation, and age. Vinyl tops develop cracks and tears, cloth tops fade and shrink. The rear plastic window (NA/NB) or glass window (NC/ND) can delaminate from the top material, causing water leaks and reduce… Repairs typically run $300-$1,500. Severity: medium.
All generations of Miata (NA through NC) are prone to rear main seal leaks as the engine ages. Oil seeps from the crankshaft rear seal, dripping onto the clutch housing and eventually contaminating the clutch disc. High mileage engines and infrequent oil changes accelerate seal d… Repairs typically run $400-$1,200. Severity: medium.
NB Miata radiators are prone to failure at the plastic upper tank where it crimps onto the aluminum core. The plastic becomes brittle with age and heat cycling, developing hairline cracks that leak coolant under pressure. This can lead to sudden coolant loss and overheating, espe… Repairs typically run $200-$500. Severity: medium.
The 1.6L B6 and 1.8L BP engines use hydraulic lash adjusters inside the bucket followers. Varnish and sludge from extended oil changes, or oil that is too thick or too thin, restrict flow into the adjuster so it cannot stay pumped up. The result is a persistent sewing-machine tic… Repairs typically run $60-$900. Severity: low.