1.8 TDCi engine: faults and reliability

• 1.8 TDCi 75/90/100 (entry-level tunes: Focus I and Transit Connect)

  2001–2013 · 75–100 hp

  With caution

  It shares the same documented weak points as the rest of the range (dual-mass flywheel, clutch, injectors, EGR), so they are worth checking even though the output is lower.^[2][3]

• 1.8 TDCi 110/115/125 (Focus II, C-Max, Mondeo, Galaxy, S-Max and Transit Connect)

  2004–2014 · 110–125 hp

  With caution

  This is the best-selling tune and also the best documented in reliability sources: the dual-mass flywheel, clutch and injectors appear repeatedly in workshop testimonies, so check their history before buying.^{[2][3][4][7][8][9]}

Buy: No known serious faults, or they have already been corrected, in this version. With caution: Worth buying if something specific is verified: history, a replaced part or a completed campaign. Avoid: High risk of a serious fault that is hard to check for or prevent.

1. 1Critical severityFrequency: OccasionalTimingBreakage of the timing belt or of the high-pressure pump's belt (running in oil)Yes: the 1.8 TDCi combines a dry belt for the camshafts with a second belt, running in oil, that drives only the Delphi high-pressure pump. If the tensioner fails or replacement is neglected, the engine can cut out suddenly or suffer serious internal damage.Appears at around 110,000 km
2. 2Medium severityFrequency: Very frequentClutchPremature wear of the dual-mass flywheel and clutchYes, it is the most-cited fault of the 1.8 TDCi: the dual-mass flywheel and clutch wear out sooner than expected, with vibrations, metallic noises at idle and jerking. It appears repeatedly in the Focus, Mondeo and S-Max, sometimes from 70,000-80,000 km.Appears at around 70,000 km
3. 3Medium severityFrequency: CommonInjectionDelphi injector failure (leaks, cracks or poor spray pattern)The 1.8 TDCi's Delphi injectors can crack, drip or spray diesel poorly over time, causing hard starting, smoke and jerking. It is a recurring fault, documented from 45,000 km in the Focus and up to 130,000 km in the Mondeo.Appears at around 45,000 km
4. 4Medium severityFrequency: CommonEmissions controlClogged or failing EGR valveThe 1.8 TDCi's EGR valve builds up carbon over time and can seize, causing jerking, loss of power and black smoke. It is a frequent and well-known fault on all models fitted with this engine.Appears at around 35,000 km
5. 5Medium severityFrequency: CommonTurboCracked boost hoses and turbo wearThe boost air hoses on Ford diesels of this era, including the 1.8 TDCi, crack over time and cause a loss of power; the turbo itself can end up damaged if this is not detected in time.Appears at around 35,000 km

Severity colours: low, medium, high, critical. How we rate them

Manufacturer

Ford Motor Company

Family

Duratorq-TDCi (Lynx)

Fuel

Diesel

Displacement

1,753 cm³

Cylinders

4

Fuel system

Turbo

Injection

Common rail

Timing

Timing belt (dry)

Power

75–125 hp

Peak torque

280 Nm

Production

2001–2014

Makes

Ford

Technical data^[1][5][6]

1. 2001–2013

   1.8 TDCi 75/90/100 (entry-level tunes: Focus I and Transit Connect)

   First 1.8 TDCi units with Delphi common-rail injection, with the lowest outputs in the range: 90 and 100 hp in the first-generation Focus and, later, 75 and 90 hp in the Transit Connect van.^[1][5][6]

2. 2004–2014

   1.8 TDCi 110/115/125 (Focus II, C-Max, Mondeo, Galaxy, S-Max and Transit Connect)

   Higher-output, higher-torque tunes of the same block: 115 hp in the second-generation Focus and the C-Max, 110 hp in the facelifted Transit Connect, and up to 125 hp in the Mondeo, Galaxy and S-Max, the heaviest models in the range.^[2][4][5][6]

• Timing kit

  • Buy part at Autodoc (affiliate link, opens in a new tab)

• Oil filter

  • Buy part at Autodoc (affiliate link, opens in a new tab)

• Air filter

  • Buy part at Autodoc (affiliate link, opens in a new tab)

• Diesel fuel filter

  • Buy part at Autodoc (affiliate link, opens in a new tab)

• Glow plugs

  • Buy part at Autodoc (affiliate link, opens in a new tab)