Ford S-Max 2.0 TDCi Mk1

The DPF on the 2.0 TDCi is coated with a platinum catalyst designed to last approximately 200,000 km, but many fail earlier. Short urban driving prevents the exhaust reaching the 600+ degree temperature needed for regeneration. The fuel vaporizer (which heats the DPF for forced regeneration) can itself fail, with the glow plug element weakening over time - replacement costs around €200-250. Pressure sensor hoses also deteriorate from heat cycling, causing false readings and failed regenerations. Professional DPF cleaning costs €300-500; full replacement runs €1,500-2,500. Post-2010 facelift models have a more complex system that is more sensitive to driving patterns. Regular motorway driving significantly extends DPF life.

The dual-mass flywheel absorbs torsional vibrations from the diesel engine but is a known wear item on Ford TDCi models. The S-Max's heavier body (1,600-1,750 kg) and frequent use as a family hauler with full passenger loads puts extra strain on the DMF. Symptoms include rattling at idle (especially cold), vibration through the pedals, and difficulty engaging gears smoothly. Some owners report failure as early as 80,000 km, particularly on cars used in stop-start traffic. The clutch should always be replaced at the same time since the gearbox must be removed. Total cost including clutch kit, DMF, and labour runs €1,000-2,000 depending on whether you use an independent specialist or Ford dealer.

The EGR valve recirculates exhaust gases to reduce NOx emissions but accumulates carbon deposits over time, especially with short-trip driving. When clogged, it causes loss of power, rough idle, increased fuel consumption, and engine malfunction warnings. The valve is located at the rear of the engine and is difficult to access - removal requires taking off wipers, cowl panel, and engine mount, plus coolant drainage. A new EGR valve costs €200-400 for the part alone; with labour, expect €350-600 at an independent garage or €800-1,200 at a Ford dealer. Some owners temporarily resolve the issue by cleaning the valve and its connector, but replacement is usually needed eventually. Post-2010 models with Euro 5 equipment tend to suffer this more frequently.

The variable-geometry turbocharger typically lasts 150,000-250,000 km but can fail prematurely if oil changes are neglected or low-quality oil is used. The electronic actuator is a common failure point - it can seize from carbon buildup, especially on cars that are driven gently and rarely reach full boost. Symptoms include loss of power, black smoke, turbo whine, and engine warning lights. Ford does not sell the actuator separately, which means many garages quote for a complete turbo replacement at €1,500-2,500. Specialist turbo actuator repair services can fix just the actuator for €150-300, saving significantly. Using good-quality oil and allowing the turbo to cool after hard driving (idle for 30 seconds before switching off) helps prevent premature failure.

The Siemens/Continental piezo injectors on the 2.0 TDCi can develop internal leaks or electrical faults, typically after 150,000+ km. Symptoms include rough idle, misfires on individual cylinders, excessive fuel consumption, and black smoke. A single reconditioned injector costs around €200-350 fitted at a specialist; new OEM injectors run €400-600 each. If all four need replacing simultaneously, expect €2,000-2,500 at a Ford dealer. Many specialists recommend replacing injector seals and back-leak pipes at the same time. Injectors can sometimes seize in the cylinder head, requiring specialist extraction tools - this adds significantly to labour costs.

S-Max automatics use the Getrag 6DCT450 wet-clutch PowerShift. While more reliable than the infamous dry-clutch 6DCT250 in smaller Fords, it still has significant issues. Plastic clutch spring damper guides are the Achilles heel - they transfer all engine torque and can crack, contaminating the gearbox with debris. Symptoms include jerky shifts, hesitation, 'Transmission Malfunction' warnings, and complete loss of drive. The gearbox needs fluid and filter changes every 60,000 km or 3 years - Ford's claim of a lifetime fill is misleading and skipping service dramatically increases failure risk. Specialist rebuild costs €1,500-3,000; complete replacement at a Ford dealer can reach €4,000+. Manual gearbox S-Max models avoid this issue entirely.

The S-Max has a known issue where the power steering rack breaks down internally, releasing metal debris into the hydraulic fluid. This debris clogs the filter and can damage the power steering pump. Symptoms start as intermittent heavy steering at low speeds and progressively worsen. Ford issued a service bulletin recommending a system flush first; if that fails, the entire system (rack, pump, lines) may need replacing. A fluid flush costs €150-300 and resolves the issue in many cases. If the pump or rack needs replacement, costs escalate to €800-1,500. Ford customer relations has occasionally contributed to repair costs on affected vehicles, so it is worth contacting them.

Several S-Max models suffer from parasitic battery drain where the car goes flat within 2-3 days of sitting unused. Common culprits include the Bluetooth module, the factory audio system (which can randomly turn on/off), and the automatic heater controller. Normal quiescent drain should be around 30 milliamps; affected cars draw 200+ milliamps. Ford released software updates to address this on some model years. Diagnosis typically costs €50-100; replacing the faulty module runs €100-300. A Ford dealer can check for available software updates using your VIN. Water ingress into the body control module (BCM) area can also cause electrical gremlins on older examples.