Mitsubishi Lancer Problems & Known Issues

The SST (Sports Shift Transmission) is Mitsubishi's twin-clutch automated manual gearbox fitted to all UK Evo X models. The clutch packs wear rapidly under enthusiastic driving and the hydraulic control system is prone to valve body failures. Early symptoms include juddering during gear changes and delayed engagement. Complete failure leaves the car undriveable and repair costs routinely exceed the vehicle's value. This is the primary reliability concern for Evo X ownership and should be thoroughly assessed before purchase.

The IHI turbocharger on the 4B11T engine is prone to bearing failure and compressor wheel damage, particularly on cars that have been modified or driven hard. Oil starvation during rapid deceleration from high RPM is a known cause. Symptoms progress from loss of boost pressure to complete turbo seizure with metal debris entering the intake system. Replacement with OEM units is expensive but aftermarket options are readily available.

The AYC (Active Yaw Control) transfer case distributes torque between the rear wheels and is integral to the Evo's handling characteristics. The unit contains complex hydraulic valving and clutch packs that wear with age and mileage. Failure symptoms include loss of rear differential lock, unusual handling characteristics, and grinding noises from the rear of the car. The transfer case shares fluid with the rear differential and requires specialist knowledge to diagnose correctly.

The CJ/CY Lancer suffers from premature failure of suspension bushes, particularly the front lower arm bushes and rear trailing arm bushes. MOT data shows this model failing at 372.9x the fleet average for suspension component fractures, with failures occurring across all mileage bands including very low mileage examples. The rubber compound used appears unsuited to UK conditions, leading to splitting and separation that affects handling and safety.