2010 MAZDA MX-5 MIATA

Typical onset: 60,000-120,000 mi

Symptoms: Metallic knocking or ticking that worsens with clutch engagement, Excessive crankshaft endplay (over 0.012 inches), Check engine light with crank position sensor codes, Sudden catastrophic failure with metal shavings in oil

Fix: Requires complete engine teardown to replace thrust bearings and machine crank journals if scored. If caught early, bearing replacement with upgraded parts takes 18-24 hours labor. If crank is damaged, you're looking at full short block or used engine swap. Many techs recommend aftermarket ACL or King thrust bearings during any rebuild.

Estimated cost: $3,500-7,500

Typical onset: 80,000-140,000 mi

Symptoms: Transmission fluid puddles under car, often near radiator area, Burnt transmission fluid smell, Shifting becomes notchy or difficult as fluid level drops, Visible rust or seepage at cooler line fittings

Fix: The steel transmission cooler lines rust through where they mount to the radiator or at compression fittings. Replacement involves lifting the car, draining fluid, and running new pre-bent lines or fabricating stainless replacements. Takes 2-3 hours plus trans fluid refill and bleeding. Some owners upgrade to aftermarket stainless lines during repair.

Estimated cost: $400-750

Symptoms: Top won't latch properly at windshield header, Excessive wind noise or water leaks at top edges, Binding or cracking sounds when opening/closing top, Visible wear or cracking in plastic pivot bushings

Fix: The soft top frame uses plastic bushings and pivots that wear or crack, especially in hot climates. Individual bushings can be replaced without removing the entire top assembly, but it's fiddly work requiring disassembly of side rails and latches. Takes 3-5 hours depending on how many points need attention. Afterall market brass bushings are a common upgrade.

Estimated cost: $350-800

Typical onset: 70,000-110,000 mi

Symptoms: Clunking during shifts, especially 1st to 2nd, Excessive shifter vibration at idle, Visible sagging or tearing of rubber mount when inspected from below, Driveline thunk when engaging clutch

Fix: The rear transmission mount (PPF mount) deteriorates and allows excessive drivetrain movement. Replacement requires supporting the transmission, removing the power plant frame, and installing new mount. Straightforward job taking 1.5-2 hours. Many owners upgrade to stiffer aftermarket mounts for better feel but increased NVH.

Estimated cost: $250-450

Typical onset: 100,000-150,000 mi

Symptoms: Hesitation or stumbling under hard acceleration, Difficult starting when fuel tank is below 1/4, Loss of power at high RPM, Fuel pump whine becomes louder

Fix: The in-tank fuel filter sock clogs with sediment over time, starving the engine of fuel. Requires dropping the fuel tank to access the pump assembly and replace the filter sock. Takes 3-4 hours including tank removal, cleaning, and reinstallation. Often done with fuel pump replacement as preventive measure.

Estimated cost: $400-700

Typical onset: 80,000-130,000 mi

Symptoms: Oil seepage visible on rear of engine near firewall, Burning oil smell from exhaust manifold area, Oil pooling in spark plug wells causing misfire codes, Minor oil consumption between changes

Fix: The valve cover gasket and spark plug tube seals harden and leak over time. Replacement requires removing coil packs, loosening accessory brackets, and cleaning mating surfaces thoroughly. Takes 2-3 hours and should include new valve cover bolts. Good opportunity to check PCV valve and clean any sludge buildup.

Estimated cost: $350-600