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Mitsubishi Evo IX (CT9A) Complete Factory Maintenance Schedule

Mitsubishi Lancer Evolution IX CT9A
Legal in 2030
Mitsubishi Lancer Evolution IX
CT9A (2005-2007)
Power
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0-60
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Top Speed
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Current Market Value
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🇺🇸 US Import Information

This vehicle will become legal to import in 2030 under the 25-year exemption rule. Check our import guide for details on the process.

Mitsubishi Lancer Evolution IX (CT9A)
Maintenance Schedule for 2005-2007 | Engine: 4G63T MIVEC 2.0L Turbo Inline-4
3,000 Miles / 3 Months
1 tasks • routine maintenance
routine
Visual Under-Hood Inspection
Easy DIY
Check engine oil, coolant, intercooler water spray reservoir, ACD/AYC fluid reservoirs. Check for oil leaks at valve cover and head gasket.
15 min
DIY Cost$0
Shop Cost$50

Tools Required:

Flashlight
Clean rag
  • Allow engine to cool
Common Issues & Solutions
Preventive maintenance based on known issues with this model
ACD fault indicator light on dash, 3-mode button non-responsive
moderate
Cause:

ACD controller error or low/contaminated ACD hydraulic fluid

Solution:

Read codes with Mitsubishi MUT or aftermarket scanner. Fluid change first, then bleed ACD pump. Controller replacement if no resolution.

Estimated Cost:$150-$2,500 depending on cause
AYC pump noise at full turn lock, rear diff whine
moderate
Cause:

AYC pump air intrusion or pump aging

Solution:

AYC system bleed via Mitsubishi procedure. Pump replacement if whine persists. AYC delete is common (-$500, -20 kg) for dedicated track cars.

Estimated Cost:$100 (bleed) to $1,800 (pump replace)
Turbo shaft play, loss of boost at high rpm
critical
Cause:

Stock TD05HR turbo bearing wear — common above 80k miles under boost

Solution:

Replace with upgraded FP Green or Tomei ARMS M7960 turbo

Estimated Cost:$1,800-$3,500
Oil pressure drop at idle hot
critical
Cause:

Oil pickup strainer clogging or oil pump wear (MIVEC oil control)

Solution:

Drop oil pan, clean pickup. Replace oil pump if still low. Switch to 10W-40 or 15W-40 for hot climates.

Estimated Cost:$300-$1,200
Cracked exhaust manifold flange
moderate
Cause:

4G63T cast iron manifold heat cycling

Solution:

Replace with stainless steel tubular manifold (Tomei, HKS) — addresses cracking and improves flow

Estimated Cost:$800-$1,400
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Evo IX Maintenance Schedule