IsItAGoodCar
Reliability Guide

Common Problems with the
2001 Mitsubishi Lancer Evolution VII-IX

The launch of the Evolution VII marked a significant shift, moving to a larger, heavier chassis based on the 'Cedia' Lancer. To compensate, Mitsubishi introduced the Active Center Differential (ACD), taking the car's cornering ability to new, physics-defying heights.

What changed for 2001

  • •Debut of the Evo VII on a new, larger platform.
  • •Introduction of the Active Center Differential (ACD).

Common MOT watch-outs

  • !Severe chassis and boot floor corrosion on cars driven through UK winters without underseal.
  • !Failure of the ACD/AYC pump due to corrosion or lack of fluid changes.
3
Known Issues
2
Serious
0
Moderate
1
Minor

All Known Issues

AYC Pump Failure

SeriousGearbox & Transmission

The Active Yaw Control pump is exposed to the elements and frequently fails due to internal corrosion.

Est. Repair Cost: £600–£1,500
Warning Signs:

Three dash lights (Tarmac, Gravel, Snow) illuminated simultaneously, Buzzing noise from the rear, Lack of AWD traction

What to Inspect:
  • Check that the three ACD/AYC lights perform their startup sequence and go out
Verified by IsItAGoodCar Research Team

Chassis & Underbody Rust

SeriousBodywork & Rust

Many imports were not undersealed when they arrived in the UK, leading to severe structural rot.

Est. Repair Cost: £500–£3,000+
Warning Signs:

Visible rust on chassis rails, MOT failure for structural corrosion, Soft spots in the boot floor

What to Inspect:
  • Inspect the rear chassis legs and the area around the suspension mounts carefully
Verified by IsItAGoodCar Research Team

Lifter Tick

MinorEngine

Hydraulic lifters can become noisy, especially on cold starts, often due to oil choice or skipped changes.

Est. Repair Cost: £150–£400
Warning Signs:

Tapping/clicking noise from the top of the engine, Noise decreases as the engine warms up

What to Inspect:
  • Listen for a consistent tapping at idle when the engine is cold
Verified by IsItAGoodCar Research Team

Buying Tips for 2001 Mitsubishi Lancer Evolution VII-IX

  • Check all three lights on the ACD/AYC dashboard display; if they all stay lit, the pump has failed (a £1,000+ repair).
  • Thoroughly inspect the boot floor and rear chassis legs for rust, a notorious Evo killer.
2002
Check a 2001 Mitsubishi Lancer Evolution VII-IX by Registration