Clutch Master Cylinder Failure
high- Typically appears
- 50–80k mi
- Estimated repair
- $250 – $400
Popular pick
2021 MAZDA
MX-5 MiataConvertible
2.0L I4 · Convertible
The 2021 Mazda MX-5 Miata is the fourth-generation (ND) version of the world's best-selling two-seat roadster — a car that has been refined over 30+ years without losing its core identity. It's light (under 2,350 lbs), rear-wheel drive, and built around the idea that driving pleasure doesn't require massive horsepower. The 2.0L SkyActiv-G four-cylinder makes 181 hp and pairs with either a 6-speed manual or 6-speed automatic; the manual is overwhelmingly the popular choice. For 2021, Mazda continued to refine the ND2 generation (introduced 2019) with a slightly updated infotainment system and standard Apple CarPlay/Android Auto. The chassis is widely praised by automotive press and owners alike for its near-perfect balance, precise steering, and low-speed communicativeness. It's genuinely one of the best-handling cars at any price point. As a daily driver in a Wisconsin winter, the Miata has real limitations — minimal ground clearance, no AWD, a tiny trunk, and a soft-top that does little to insulate from the cold. Most Wisconsin owners store or garage it from November through March. If you drive it year-round, expect to invest in proper winter tires and accept that it will demand more attention in harsh conditions than a practical commuter would.
Reliability
4/5
Verified data
Engine
2.0L I4
Drivetrain
Rear-Wheel Drive
Fuel
Gasoline
MPG
26 city / 35 highway / 30 combined
Seats
2
Doors
2
Body
Coupe
MSRP
$26,830
Overview
AI-curatedThe 2021 Mazda MX-5 Miata is the fourth-generation (ND) version of the world's best-selling two-seat roadster — a car that has been refined over 30+ years without losing its core identity. It's light (under 2,350 lbs), rear-wheel drive, and built around the idea that driving pleasure doesn't require massive horsepower. The 2.0L SkyActiv-G four-cylinder makes 181 hp and pairs with either a 6-speed manual or 6-speed automatic; the manual is overwhelmingly the popular choice. For 2021, Mazda continued to refine the ND2 generation (introduced 2019) with a slightly updated infotainment system and standard Apple CarPlay/Android Auto. The chassis is widely praised by automotive press and owners alike for its near-perfect balance, precise steering, and low-speed communicativeness. It's genuinely one of the best-handling cars at any price point. As a daily driver in a Wisconsin winter, the Miata has real limitations — minimal ground clearance, no AWD, a tiny trunk, and a soft-top that does little to insulate from the cold. Most Wisconsin owners store or garage it from November through March. If you drive it year-round, expect to invest in proper winter tires and accept that it will demand more attention in harsh conditions than a practical commuter would.
Known for
- Best-in-class handling and driver feedback for a production sports car
- Lightweight platform (under 2,350 lbs) that amplifies every input
- Reliable SkyActiv-G 2.0L engine with a strong long-term track record
- Huge enthusiast community with strong parts and aftermarket support
- Manual soft-top that opens and closes in seconds by hand
Best for
- Driving enthusiasts who prioritize feel and fun over practicality
- Weekend and fair-weather drivers in seasonal climates
- Autocross, track days, and canyon carving
- Owners who already have a practical daily driver
- Those who want a sports car with manageable running costs
Watch for
- Not a practical sole vehicle in Wisconsin — plan for winter storage or a dedicated winter car
- Clutch master cylinder failures are a known weak point across the ND generation
- Convertible top mechanism can develop issues; soft-top models need extra care to avoid leaks
- Very limited cargo space — groceries for two is about the limit
- Road salt exposure on the undercarriage is a serious concern if driven year-round in Wisconsin
Common issues by mileage
6 knownConvertible Top Malfunction (electrical/hydraulic)
medium- Typically appears
- 30–60k mi
- Estimated repair
- $600 – $1,500
EVAP System Large Leak (P0455)
medium- Typically appears
- 40–80k mi
- Estimated repair
- $50 – $200
Manual Transmission Synchro Wear
low- Typically appears
- 80–120k mi
- Estimated repair
- $800 – $1,800
Battery Drain / Weak Battery (Cold Climate)
medium- Typically appears
- 30–60k mi or after winter storage
- Estimated repair
- $150 – $300
Soft-Top Weatherstrip Leaks
medium- Typically appears
- 40–80k mi
- Estimated repair
- $100 – $400
Maintenance schedule
- 1 Every 7,500 miles or 6 months, whichever comes first Engine oil change — 0W-20 Full Synthetic
Mazda's SkyActiv-G runs tight tolerances. Using the correct 0W-20 full synthetic and not stretching intervals protects the engine, especially important on a car that sees occasional hard driving. Capacity is 4.5 qts with filter.
- 2 Every 30,000 miles or 24 months Manual transmission fluid change — Mazda M5
The 6-speed manual is sensitive to fluid quality. Using Mazda's specified M5 fluid (or a compatible equivalent) preserves synchro feel and shift quality. Using the wrong fluid is a common cause of premature synchro wear.
- 3 Every 30,000–45,000 miles Rear differential fluid change — 75W-90 GL-5
Often overlooked on sports cars driven enthusiastically. Fresh fluid protects the rear diff, especially if the car sees any track use or spirited driving.
- 4 Every 2 years regardless of mileage Brake fluid flush — DOT 3
Brake fluid absorbs moisture over time, lowering its boiling point. On a car used for spirited driving, degraded fluid can cause brake fade. Capacity is 0.8 qts.
- 5 Every 50,000 miles or as coolant test strips indicate Coolant service — Mazda FL-22 (blue)
Mazda FL-22 is a long-life coolant but does degrade. Do NOT mix with green conventional coolant — it will gel and damage the cooling system. Capacity is 6.3 qts.
- 6 Every 15,000 miles or annually Cabin air filter replacement
The Miata's cabin filter is easy to access and inexpensive. With a convertible, dust and debris enter more readily than in a sealed sedan — inspect it at least once a year.
- 7 Every 30,000 miles Air filter replacement
Standard maintenance. On a car that may sit stored for months, also inspect for rodent nesting material before the first spring startup.
- 8 At every oil change Clutch pedal feel inspection
The clutch master cylinder is a known weak point on all ND Miatas. Catching a soft or slightly spongy pedal early (often a sign of internal seal weeping) lets you replace it before it leaves you stranded. Parts and labor at an independent shop run $250–$400.
Always defer to the manufacturer's service manual for warranty-mandated intervals.
Cost of ownership
Annual maintenance
$500 – $900
Fuel
At 30 MPG combined and ~12,000 miles/year, expect roughly $1,400–$1,700/year at $3.50–$4.25/gal. Premium fuel is not required — regular 87 octane is specified.
Insurance
Sports car classification means insurance runs higher than average — typically $1,200–$1,800/year for a driver with a clean record in the Lake Geneva area, depending on age and coverage level. Shop around; rates vary widely for two-seat roadsters.
The Miata is one of the more affordable sports cars to own and run. The engine doesn't drink oil, doesn't require premium fuel, and parts are widely available at reasonable prices. The main cost wildcards are the clutch master cylinder (budget $300–$400 if it hasn't been done), convertible top repairs if the mechanism fails, and tire costs — the factory Bridgestone Potenza rubber is performance-focused and doesn't last long. Expect to replace tires every 25,000–35,000 miles. Annual maintenance at an independent shop should stay in the $500–$900 range in normal years.
Seasonal care
Lake Geneva, WI Winter
- Most Wisconsin Miata owners store the car from late October through April — this is strongly recommended. Road salt, sub-zero temps, and minimal ground clearance make year-round daily driving impractical.
- Before storage: wash and thoroughly dry the undercarriage to remove road salt, apply an underbody protectant if possible, change the oil so acidic used oil doesn't sit in the engine all winter.
- Use a quality battery tender (trickle charger) during storage. The Miata's battery will discharge and sulfate over a 4–5 month storage period without one.
- Store with a full tank of fuel and a fuel stabilizer added to prevent varnish buildup in the injectors and fuel system.
- If driving in winter is unavoidable, fit dedicated winter tires on a separate set of wheels — the stock summer tires are dangerous below 40°F. Use winter-rated washer fluid rated to at least -20°F.
- Check that the soft-top seals and drain tubes are clear before storage — standing water in the footwells over winter will cause serious rust and mold issues.
Summer
- Inspect tire pressure monthly — the factory-spec low-profile tires lose pressure noticeably with temperature swings. Check cold, before driving.
- The A/C system on the Miata is functional but modest — if it's blowing warm after storage, have refrigerant levels and the condenser inspected before peak summer.
- Check coolant concentration before summer — FL-22 should protect to at least 265°F. A 50/50 mix is correct; do not run straight water.
- Soft-top fabric should be treated with a UV protectant spray each spring to prevent cracking, fading, and premature wear from Wisconsin summer sun.
- After the first drive post-storage, check brake function carefully — pads and rotors can develop surface rust during storage that clears after a few firm stops.
- Inspect the underbody and wheel wells for any salt corrosion that developed before storage — address rust spots early before they spread.
Comparable vehicles
2021 Toyota
GR86
RWD sports coupe in the same price range, adds a back seat (barely usable) and a hardtop body. More practical for year-round Wisconsin use but heavier and less communicative than the Miata.
No catalog match2021 Fiat
124 Spider
Built on the same ND Miata platform, shares the same chassis and dimensions but uses a turbocharged 1.4L Fiat engine. More torque low in the rev range, slightly softer ride, and a different aesthetic. Fewer dealers and higher repair costs are real drawbacks.
No catalog match2021 Mini
Cooper Convertible
FWD convertible at a similar price point. Far more practical (four seats, real trunk), better for year-round use, but provides none of the sports-car driving engagement of the Miata. Worth considering if the Miata's impracticality is a concern.
No catalog match
2021 Mazda
MX-5 Miata RF
The retractable fastback (RF) version of the same car adds a folding hardtop that improves NVH, insulation, and security over the soft-top. Slightly heavier and $5k more, but a better fit for Wisconsin owners who want to extend the driving season.