2004 TOYOTA MR2

Typical onset: 80,000-150,000 mi

Symptoms: Loss of power and rough idle, Metallic rattling from engine bay at startup, Oil consumption increases dramatically, Check engine light with misfire codes (P0301-P0304)

Fix: The pre-cat (integrated into exhaust manifold) can break apart internally, sending ceramic debris into cylinders and scoring cylinder walls. Requires engine teardown, cylinder honing or rebore, new pistons/rings, often connecting rod bearings. Full job is 25-35 labor hours including removal/reinstallation in mid-engine bay. Many shops now recommend pre-cat delete with aftermarket header as preventive measure (6-8 hours).

Estimated cost: $4,500-7,500

Typical onset: 60,000-100,000 mi

Symptoms: Gear selection delays or refusals, Flashing gear indicator on dash, Grinding or clunking during shifts, Stuck in gear or won't shift out of neutral

Fix: The automated-manual (SMT) uses hydraulic actuators that wear and leak. Clutch also wears faster than manual due to computer learning curve. Actuator replacement is 8-10 hours due to transaxle access. Clutch job on SMT is 12-15 hours (must drop entire drivetrain from below). Many owners convert to manual swap instead.

Estimated cost: $2,800-4,200

Typical onset: 70,000-120,000 mi

Symptoms: Excessive drivetrain movement under throttle/braking, Clunking when shifting or launching, Vibration at idle transmitted through chassis, Visible sagging or torn rubber on mount inspection

Fix: Mid-engine layout puts unusual stress on mounts. Right-side engine mount and rear transmission mount fail most often. Access is tight; requires lifting car and supporting drivetrain. All three mounts should be done together. 4-6 hours labor for the set.

Estimated cost: $600-1,000

Typical onset: 100,000-180,000 mi

Symptoms: Blue smoke on deceleration or startup, Burning 1 quart every 800-1,500 miles, Fouled spark plugs, Carbon buildup visible in throttle body

Fix: 1ZZ-FE engines are known for oil control ring issues, exacerbated if pre-cat debris entered cylinders. Requires rings, hone, often pistons if scoring is severe. Same 25-30 hour job as pre-cat damage repair. Not worth doing unless you're committed to keeping the car long-term.

Estimated cost: $3,800-6,000

Symptoms: Hard starting when hot, Stumbling or hesitation under load, Stalling at idle after driving, Fuel pump whine louder than normal

Fix: In-tank fuel filter rarely gets changed, and original pumps are 20+ years old now. Pump access requires dropping fuel tank (2.5-3 hours). Filters often not available separately, requiring full pump assembly. Also check fuel pressure regulator for leaks.

Estimated cost: $400-800

Symptoms: Rear plastic window cloudy or separated from fabric, Top frame binding or won't latch properly, Water leaks at top side seals, Frame cables fraying or rusted

Fix: Not mechanical, but universal on older Spyders. Rear window delaminates from top fabric and turns yellow. Aftermarket glass window conversions available. Top mechanism cables and pivots rust in wet climates. Top frame repair/rebuild is 3-4 hours. Full top replacement (DIY-friendly) takes 2-3 hours with patience.

Estimated cost: $350-900