The 2006 Evo IX is a legendary AWD turbo sedan built for abuse, but the 4G63 engine and transmission demand respect. Most problems stem from modified examples or deferred maintenance, though even stock cars have weak points that emerge with mileage and spirited driving.
Transfer Case Rear Output Seal & Center Diff Pump Failure
Common · high severityTypical onset: 60,000-90,000 mi
Symptoms: Grinding or whining from center of car during acceleration, Gear oil puddle under transmission/transfer case area, Loss of AWD or violent driveline shudder in turns, Check Engine Light with ACD/AYC fault codes
Fix: Transfer case must come out to replace rear seal and inspect center diff pump assembly. If pump is damaged, expect full transfer case rebuild or replacement. 8-12 hours labor depending on skill level and whether trans needs to drop.
Estimated cost: $1,800-3,500
Crankshaft Walk & Thrust Bearing Failure
Occasional · high severityTypical onset: 80,000-120,000 mi
Symptoms: Metallic scraping noise at idle that changes with clutch engagement, Oil leaking from rear main seal area, Clutch pedal feel changes or clutch won't disengage properly, Vibration at idle that wasn't there before
Fix: The 4G63 thrust bearing wears and allows crank to walk forward into the clutch. Requires full engine removal, crank inspection, thrust bearing replacement, and often flywheel resurfacing. If caught late, crank needs machining or replacement. 20-25 hours for proper fix.
Estimated cost: $3,000-5,500
Camshaft Lifter Wear & Valve Train Noise
Common · medium severityTypical onset: 70,000-110,000 mi
Symptoms: Loud ticking or tapping from valve cover, especially cold start, Noise persists after oil changes with correct weight, Loss of power at high RPM, Metal shavings in oil filter during changes
Fix: Worn cam lobes or collapsed lifters require head removal, cam replacement, and full lifter set. Often find scoring on cam journals. Head resurface recommended while apart. 12-16 hours labor plus machine work.
Estimated cost: $2,200-4,000
Lower Control Arm Bushing Failure
Common · medium severityTypical onset: 50,000-80,000 mi
Symptoms: Clunking over bumps from front suspension, Steering wander or vague on-center feel, Uneven inner tire wear, Suspension feels loose or unsettled
Fix: Front lower control arm bushings are under-engineered for this car's performance envelope. Bushings tear and separate, requiring full arm replacement (bushings not sold separately by Mitsubishi). Alignment mandatory after. 3-4 hours labor for both sides.
Estimated cost: $800-1,200
Turbo Oil Feed Line Banjo Bolt Clogging
Occasional · high severityTypical onset: null
Symptoms: Turbo whine or whistle changes tone under boost, Blue smoke from exhaust especially after idle, Loss of boost pressure, Turbo failure with shaft play
Fix: The restrictive banjo bolt filter screens on the turbo oil feed line clog with debris, starving the turbo bearings. Caught early, clean screens and replace feed line. If turbo is damaged, expect replacement. 6-8 hours with turbo R&R.
Estimated cost: $150-2,500
5-Speed Transmission Synchro Wear (2nd & 3rd Gear)
Common · medium severityTypical onset: 80,000-130,000 mi
Symptoms: Grinding or resistance going into 2nd gear, especially when cold, 3rd gear pops out under deceleration, Hard to downshift quickly into 2nd, Gear oil has metallic sheen or glitter
Fix: The 5-speed's 2nd and 3rd synchros are weak points, especially in cars that saw track use or aggressive driving. Requires transmission removal and full rebuild with synchro replacement. 10-14 hours labor plus rebuild parts.
Estimated cost: $2,000-3,500
Harmonic Balancer Separation
Occasional · high severityTypical onset: 90,000-140,000 mi
Symptoms: Severe vibration at idle that worsens with RPM, Visible wobble of crank pulley when engine running, Serpentine belt shredding or coming off, Rough idle and accessory drive noise
Fix: Rubber ring separates from outer pulley, causing violent imbalance. If caught before pulley comes apart completely, it's a straightforward replacement. If it grenades, expect collateral damage to belt, tensioner, and possibly oil pump drive. 2-3 hours labor.
Estimated cost: $400-800
Buy one if you can verify maintenance history and accept that ownership costs rival German sports sedans — when maintained, they're bulletproof, but neglect kills them fast.
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.