Description of defect

In the power transmission unit, there is a part of the inner surface of the clutch master cylinder that has defective surface treatment, causing abnormal wear on the primary cup of the piston. If the clutch continues to be used in this condition, the clutch pedal may not return properly, the clutch may not disengage, or abnormal noise may occur.

Improvement details

Replace the clutch master cylinder with an improved one.

Chassis number of target vehicles

Lancer

CT9A-0007963～CT9A-0010522

Automotive maintenance cannot determine the cause based on symptoms alone.
Be sure to perform diagnosis and inspection before determining the cause of the failure.