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2002 HONDA CIVIC SI

2.0L I4 K20FWDMANUALgas
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5-Year Cost of Ownership
$10,186 maintenance + known platform issues
~$2,037/yr · 170¢/mile equivalent · $5,814 maintenance + $3,672 expected platform issues
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Common Problems & Known Issues

The 2002 Civic Si (EP3) with the K20A3 is a solid platform, but second gear synchro failures are legendary, and the non-VTEC engine means many owners beat on it trying to find power, leading to premature bearing and ring wear.

Second Gear Synchro Failure (Transmission)

Common · high severity
Typical onset: 60,000-120,000 mi
Symptoms: Grinding or crunching into second gear, Difficulty downshifting to second under load, Complete lockout of second gear in severe cases
Fix: Transmission rebuild with synchro replacement is the proper fix, 8-12 hours labor. Many shops won't tackle it; expect to pull and send out or do a used trans swap (4-6 hours). Syncro kits run $300-500, but you're already in there so bearings and seals get done too.
Estimated cost: $1,800-3,200

Piston Ring Land Failure / Bearing Wear

Occasional · high severity
Typical onset: 100,000-150,000 mi
Symptoms: Excessive oil consumption (quart every 500-1000 miles), Blue smoke on startup or acceleration, Low compression on one or more cylinders, Metallic knocking or rod knock at idle
Fix: K20A3 engines were often abused due to lack of VTEC crossover — owners rev them hard looking for power. Ring land cracks or bearing wear result. Proper fix is teardown, new pistons/rings, bearing inspection, 16-20 hours labor. Many opt for used K20 swap instead.
Estimated cost: $3,000-5,500

Rear Transmission Mount Collapse

Common · medium severity
Typical onset: 80,000-140,000 mi
Symptoms: Clunking on takeoff or aggressive shifts, Excessive driveline movement visible under hood, Vibration in cabin under load
Fix: Rear trans mount hydraulic fluid leaks out, mount collapses. Aftermarket polyurethane mounts last longer but increase NVH. OEM replacement is 1.5-2 hours labor, easy DIY.
Estimated cost: $200-400

Fuel Filter Clogging (In-Tank)

Occasional · medium severity
Typical onset: 120,000+ mi
Symptoms: Hesitation or stumbling under acceleration, Difficulty starting when hot, Fuel pump whine audible in cabin
Fix: The in-tank sock filter clogs on neglected cars. Requires fuel tank drop, 2-3 hours labor. While you're in there, inspect the pump. Honda doesn't sell the filter separately in the aftermarket easily; many replace the whole pump assembly.
Estimated cost: $350-650

Transmission Oil Cooler Line Leaks

Occasional · low severity
Typical onset: 100,000+ mi
Symptoms: Transmission fluid spots on driveway, Low fluid level on dipstick, Burnt smell if severely low
Fix: Rubber lines to the small cooler deteriorate. Easy 1-hour fix, but if neglected leads to trans overheating and accelerates that second gear synchro death. Replace both lines and flush fluid.
Estimated cost: $150-300

Head Gasket Seepage (Minor)

Rare · low severity
Typical onset: 150,000+ mi
Symptoms: Slight oil weepage between head and block, No overheating or coolant loss, Visible residue on passenger side of block
Fix: K-series don't typically blow head gaskets like older Hondas, but high-mileage examples can seep oil. If no coolant crossover, monitor it. Full HG job is 6-8 hours labor if you address it, but most live with minor seepage.
Estimated cost: $800-1,400
Owner tips
  • Change transmission fluid every 30,000 miles with genuine Honda MTF — it helps second gear live longer but won't save an already-worn synchro.
  • These engines drink oil past 100k if driven hard; check level every fuel fill and don't let it drop below halfway on the dipstick.
  • Rear trans mount is a 30-minute DIY — replace it before it grenades and causes axle or shift linkage damage.
  • Avoid examples with unknown service history or evidence of hard launches; second gear synchro and ring land failures are almost always abuse-related.
Buy one if the trans shifts clean and it doesn't burn oil — walk away if second gear grinds or the owner has a fart can and coilovers with no records.
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.
498 jobs across 17 categories

body (34)

brakes (41)

cooling (21)

drivetrain (24)

electrical (75)

engine (68)

exhaust (22)

hvac (23)

interior (24)

maintenance (31)

steering (19)

suspension (42)

transmission (42)

🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years.
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