The 2004 S2000 with the F20C engine is a mechanically robust, high-revving sports car that demands proper maintenance. Most issues stem from age-related wear on specific components rather than fundamental design flaws, but neglect or abuse will cost you dearly.
Transmission synchro wear (2nd and 3rd gear)
Common · medium severityTypical onset: 80,000-150,000 mi
Symptoms: Grinding or resistance entering 2nd gear, especially when cold, Crunch into 3rd under hard acceleration or quick shifts, Notchy or balky shifting that worsens over time
Fix: Requires transmission removal and rebuild with new synchros, bearings, and seals. 10-14 hours labor. Many shops recommend replacing the clutch simultaneously since you're already in there. OEM Honda synchros are the only reliable fix.
Estimated cost: $2,800-4,200
Valve retainer failure (F20C engine)
Occasional · high severityTypical onset: 60,000-120,000 mi
Symptoms: Sudden onset of valve train noise, metallic ticking at idle, Check engine light with misfire codes, Catastrophic engine damage if retainer drops into cylinder
Fix: All 16 valve retainers should be replaced preventively with updated parts during timing chain service or head work. If one fails, you're looking at head removal, inspection for valve/piston damage, and potential full rebuild if debris circulated. Head R&R alone is 8-10 hours.
Estimated cost: $1,800-3,500 preventive / $5,000-9,000+ if failure causes damage
Timing chain tensioner wear
Common · medium severityTypical onset: 100,000-150,000 mi
Symptoms: Cold-start rattle for 2-3 seconds that goes away, Metallic whirring or chain slap noise from front of engine, Rough idle or slight loss of power if chain has jumped
Fix: Replace tensioner, chain, guides, and oil jet at minimum. This is preventive maintenance on a high-mileage F20C. 6-8 hours labor. Don't skip the updated tensioner design.
Estimated cost: $1,200-2,000
Soft top frame cracking and cable failure
Common · low severitySymptoms: Top won't latch properly or pops up at highway speed, Visible cracks in the frame near mounting points, Cable detachment from frame causing top to sag or bind
Fix: Frame welding or replacement, plus recabling if necessary. Aftermarket reinforcement plates can prevent recurrence. 3-5 hours if welding, 6-8 hours for full frame replacement.
Estimated cost: $400-800 repair / $1,200-1,800 replacement
Clutch master and slave cylinder failure
Occasional · medium severityTypical onset: 80,000-140,000 mi
Symptoms: Clutch pedal sinks to floor and stays there, Soft or spongy pedal feel, difficulty getting into gear, Fluid leak visible at firewall or bellhousing
Fix: Replace both master and slave cylinders together, plus bleed system. The slave cylinder is internal (inside the bellhousing), requiring transmission removal. 8-10 hours total.
Estimated cost: $1,200-1,800
Rear suspension ball joint failure (lower control arm)
Occasional · high severityTypical onset: 70,000-120,000 mi
Symptoms: Clunking or popping from rear over bumps, Wandering or darty steering feel at highway speeds, Visible play or torn boots on ball joints
Fix: Ball joints are pressed into the control arms; most shops replace the entire arm assembly rather than pressing. 3-4 hours for both sides, alignment required afterward.
Estimated cost: $800-1,200
Starter motor heat soak failure
Occasional · medium severitySymptoms: No-start or slow cranking when engine is fully hot, Clicking sound from starter area, starts fine when cold, Intermittent starting issues in hot weather or after spirited driving
Fix: Replace starter motor, located under the intake manifold. Access is tight. 2-3 hours labor. Heat shielding can help prevent recurrence.
Estimated cost: $500-800
I'd buy a well-maintained 2004 S2000 in a heartbeat if the service history shows transmission and engine care — but budget $3,000-5,000 for deferred maintenance on any high-mileage example.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.