2002 LEXUS IS 300

Typical onset: 100,000-180,000 mi

Symptoms: Transmission fluid leaking near radiator or under engine bay, Pink/red fluid puddles after parking, Transmission overheating or slipping if fluid level drops significantly, Coolant contamination with ATF (milky radiator fluid) if internal cooler fails

Fix: Replace external cooler lines (rubber sections crack and burst) or full cooler assembly if internal failure detected. Includes fluid flush. 2-3 hours labor. If ATF mixed with coolant, add radiator replacement and complete system flush (4-5 hours total).

Estimated cost: $400-800 for lines only, $1,200-1,800 if radiator contaminated

Typical onset: 80,000-140,000 mi

Symptoms: Clunking when shifting from Park to Drive or Reverse, Excessive vibration at idle in gear, Visible sagging or cracking of rubber mount when inspected from below, Drivetrain lurch during throttle application

Fix: Replace rear transmission mount (large hydro mount). Requires lifting transmission slightly. 1.5-2 hours labor. Often done with engine mounts if those are also worn.

Estimated cost: $250-450

Typical onset: 120,000-200,000 mi

Symptoms: Coolant loss with no visible external leaks, White smoke from exhaust (coolant burning), Milky oil on dipstick or oil cap, Persistent overheating despite new thermostat/radiator, Combustion gases in coolant (bubbling overflow tank)

Fix: If caught early: head gasket replacement, machine head flat if warped (8-12 hours labor). If driven hot repeatedly: full head rebuild or replacement, sometimes includes ARP studs. Severe cases require short block or full rebuild if bearings damaged. The 2JZ itself is tough—damage is user-induced neglect of cooling system.

Estimated cost: $2,000-3,500 head gasket only, $4,500-7,500 full engine rebuild

Typical onset: 100,000+ mi (especially if maintenance history unknown)

Symptoms: Hesitation or stumbling under acceleration, Difficulty starting when engine is hot, Intermittent stalling at idle or low speed, Fuel pump whining noise from rear seat area

Fix: Replace in-tank fuel filter (not serviceable separately on many—requires pump module removal). Drop tank, replace filter or full pump assembly if pump damaged by restricted flow. 2-3 hours labor. Often neglected since no factory interval published.

Estimated cost: $350-650 filter, $600-1,000 if pump also replaced

Typical onset: 150,000+ mi or any mileage with extended oil change intervals

Symptoms: Rattling from front of engine on cold start, lasts 2-5 seconds, Noise disappears once oil pressure builds, Check engine light with VVT system codes (P1349, P0010)

Fix: Caused by sludge or worn cam gear actuator. Try engine flush and frequent oil changes (every 3k mi) first. If persistent, replace VVT-i cam gear and solenoids. Timing cover removal required. 4-6 hours labor. Preventable with religious 5,000-mile oil changes using quality synthetic.

Estimated cost: $150-300 for flush/maintenance approach, $800-1,400 for gear replacement

Typical onset: 120,000-180,000 mi

Symptoms: Battery warning light on dash, Dimming headlights at idle, Electrical accessories acting erratically, No-start after sitting (battery drained)

Fix: Factory alternators last well but eventually fail. Serpentine belt removal, alternator R&R. 1.5-2 hours labor. Test before replacing—sometimes just corroded connections at battery or alternator.

Estimated cost: $400-700