SevereAffected: 2011-201870,000–120,000 miles

Ford Focus Mk3 2.0 TDCi — Clutch Slave Cylinder / Concentric Bearing Leak

The concentric slave cylinder (CSC) inside the gearbox bellhousing fails, leaking hydraulic fluid and causing clutch failure.

Severity

Severe

DIY Difficulty

Professional Only

Est. Cost

£400–£800

OBD Codes

None

Component Diagram

Clutch

Typical layout and location for the Clutch assembly.

Reference Illustration

Symptoms

Clutch pedal stays flat to the floor
Difficulty engaging gears, especially 1st and Reverse
Pool of brake fluid under the gearbox bellhousing

Root Cause

The seals inside the concentric slave cylinder wear out. Because it is mounted inside the bellhousing on the gearbox input shaft, the entire gearbox must be removed to replace a £40 part.

How To Fix

Check brake/clutch fluid reservoir level (it will be low).
Gearbox must be removed to access the CSC.
Always replace the entire clutch kit at the same time, as the leaking fluid ruins the friction plate.
Cost: £400-800

Estimated Repair Costs

Repair Option	Est. Cost (GBP)
DIY (parts only)	£160–£320
Independent Garage	£400–£800
Main Dealership	£640–£1280

Other Faults on This Variant

Powershift Dual Clutch Gearbox Failure

Critical

2011-201550,000–100,000 miles£1800–£2500

The 6-speed Powershift (MPS6/6DCT450) automatic gearbox is notoriously fragile. Internal plastic parts shatter, clogging the transmission filter.

Steering Rack Motor Failure (EPS)

Critical

2011-201850,000–120,000 miles£800–£1200

The Electronic Power Steering rack on the Mk3 Focus suffers from water ingress, causing the motor to short out.

DPF Vaporiser Failure

Moderate

2011-201860,000–110,000 miles£250–£350

Ford uses a 5th injector (vaporiser) in the exhaust to regenerate the DPF. This vaporiser clogs with soot, preventing regeneration.

Disclaimer: Repair cost estimates are indicative and based on community data. Always get a quote from a qualified mechanic before proceeding with any repair.