Parts for your 2015 Mitsubishi Lancer-Clutch master cylinder

2015 Mitsubishi Lancer clutch master cylinder — what it does and when to replace it

Based on Mitsubishi’s 2015 Lancer service manual (Group 22A – Clutch), the Mitsubishi ASA/EPC parts catalogue, and aftermarket catalogues from brands commonly supplying Australia and New Zealand, a clutch master cylinder is fitted to 2015 Lancer models with a manual gearbox. CVT-equipped Lancers don’t use a clutch master cylinder because there’s no manual clutch pedal or hydraulic clutch circuit to operate.

On manual 2015 Lancers, the clutch master cylinder is the small hydraulic pump bolted to the firewall, linked to the clutch pedal. Pressing the pedal pushes a piston in the master cylinder, generating hydraulic pressure that travels down a line to the slave cylinder. That pressure moves the release mechanism so the clutch can cleanly disengage, letting the driver shift gears without graunching or creep. It’s a simple, reliable setup that relies on clean brake/clutch fluid (DOT 3 or DOT 4 as specified in the handbook).

As part of routine servicing, it’s smart to:

• Check the fluid in the shared brake/clutch reservoir. If it’s low, dark, or contaminated, book a flush and bleed.
• Inspect around the master cylinder pushrod and firewall for dampness, paint lift, or weeping seals.
• Look for soft, sinking, or spongy pedal feel, difficulty selecting gears, clutch slip after disengagement, or a bite point that wanders. These are classic clues of internal bypass or external leakage.

Many workshops in AU/NZ recommend replacing brake/clutch fluid about every two years to control moisture build-up and corrosion. Keeping the master cylinder clean inside pays off in consistent pedal feel and longer seal life. If the master cylinder is leaking or the pedal won’t hold pressure, replacement is the reliable fix. Quality replacement units come pre-assembled, a technician will bench-bleed the new master, fit it, then pressure- or vacuum-bleed the system to clear air. It’s also good practice to inspect the slave cylinder and flexible hose at the same time—if one end is failing, the other may not be far behind.

Note for owners of CVT 2015 Lancers: there’s no clutch pedal, no friction clutch, and therefore no clutch master cylinder. The CVT uses its own transmission control and fluid system, so clutch hydraulic maintenance doesn’t apply.

Popular questions

Does every 2015 Mitsubishi Lancer have a clutch master cylinder?
No. Manual models do, as confirmed by the Mitsubishi service manual and parts catalogue. CVT models don’t have a clutch pedal or hydraulic clutch circuit, so there’s no clutch master cylinder fitted.

What are the symptoms of a failing clutch master cylinder on a 2015 Lancer?
Common signs include a soft or sinking pedal, trouble engaging gears, a bite point that moves, or fluid weeping near the pedal/firewall. Dark or low fluid can also point to internal wear or leaks in the hydraulic system.

How often should the clutch hydraulic fluid be changed?
While intervals vary, many AU/NZ workshops suggest flushing the brake/clutch fluid about every two years. Clean fluid helps protect seals in both the master and slave cylinders and maintains a consistent pedal feel.