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CriticalVery commonCooling

Ford Focus: 1.0 EcoBoost M1DA cylinder head crack & coolant loss

1.0 EcoBoost M1DA cylinder head crack & coolant loss is a very common cooling fault on the Ford Focus on the 2012–2013 cars, and we rate it critical. Putting it right costs $3,500 to $8,500 at New Zealand independent workshop rates. Below is what goes wrong, the symptoms to notice on a test drive, where to look, and what to ask the seller before you hand over any money. It is one of 37 documented faults on the Ford Focus.

Vehicle
Ford Focus
Engine
1.0L
Years
2012–2013
Fuel
petrol
System
Cooling

This page covers the Ford Focus as a model. Some faults only affect particular engines or build years — enter a plate below to narrow the list to one car.

All Ford Focus faults37 documented faults on this model

What you are looking at

A removed six-cylinder diesel engine cylinder head on cardboard, valve-gear side facing up.Example of the part — not this vehicle

A six-cylinder diesel head off the engine, valve-gear side up. Cracks run between the valve seats on the face beneath.

Ll1324 · CC0 · Wikimedia Commons

What goes wrong

The M1DA (and early M2DA) three-cylinder cylinder head develops cracks adjacent to the EGR port coolant gallery, allowing coolant to enter the combustion chamber or exhaust tract. Ford issued an extended warranty program and recalls in multiple markets after widespread failures. Coolant loss is often gradual and symptom-free until the engine overheats catastrophically. A combustion gas (CO2) test on the coolant reservoir is the definitive pre-purchase check. Repair requires cylinder head replacement; reground or welded heads often re-crack at the same location.

What you would notice

  • White or sweet-smelling steam from exhaust under load
  • Coolant level dropping with no visible external leak
  • Overheating warning light or high temperature gauge
  • Milky or caramel-coloured residue on oil filler cap
  • Bubbling in coolant reservoir at idle

How to check it

Where to look. Cylinder head coolant gallery adjacent to EGR port, top of engine

  1. Perform a combustion gas (block) test on the coolant reservoir with engine warm and running.

  2. Check coolant level cold and look for oily residue on the cap.

  3. Inspect exhaust for sustained white steam.

  4. Check Ford VIN against extended warranty or recall campaigns.

  5. Review service records for previous head replacement.

Parts involved: Cylinder head.

What it costs to put right

$3,500 to $8,500 at New Zealand independent workshop rates. That is for this job on its own, not for the car.

An estimate, in NZD, for the repair as normally carried out. What a specific car costs depends on which part has failed and what it damaged on the way — treat this as the floor for a negotiation, not a quote.

Ask the seller

  • “Has the cylinder head been replaced under Ford's extended warranty?”
  • “Has a combustion gas test ever been performed on the coolant?”
  • “Any history of coolant loss, overheating, or white exhaust smoke?”
  • “What is the current coolant level — when was it last topped up?”

Now check the Ford Focus you are actually looking at

Everything above is true of the model, and it is free. What it does not tell you is whether THIS car has been looked after: its odometer history and whether the reading has ever gone backwards, whether there is still money owing on it, whether it has been reported stolen, how many owners it has had and what it is really worth today. That comes from the official records for that plate. Enter the plate for the free details, or get the full history and a market valuation from $13.49.

Not sure what you would be paying for? See what a full KickTyres check includes.

Where this comes from

The failure described above is documented in published sources — owner forums, technical service bulletins, recall notices and workshop write-ups — held in our fault database. The inspection instructions and the cost estimate are KickTyres’ own interpretation of them, and it is a starting point for an inspection rather than a manufacturer statement.

Ford Focus buyer questions

Is 1.0 ecoboost m1da cylinder head crack & coolant loss serious on a Ford Focus?

We rate it critical and very common on the Ford Focus. The M1DA (and early M2DA) three-cylinder cylinder head develops cracks adjacent to the EGR port coolant gallery, allowing coolant to enter the combustion chamber or exhaust tract. Ford issued an extended warranty program and recalls in multiple markets after widespread failures. Coolant loss is often gradual and symptom-free until the engine overheats catastrophically. A combustion gas (CO2) test on the coolant reservoir is the definitive pre-purchase check. Repair requires cylinder head replacement; reground or welded heads often re-crack at the same location.

How much does it cost to fix on a Ford Focus?

$3,500 to $8,500 at New Zealand independent workshop rates. That figure is for this job on its own. A car showing the symptoms on this page is usually worth either walking away from or negotiating down by at least the repair figure.

Which Ford Focus years are affected?

Our research records this fault on the 2012–2013 Ford Focus. Build dates move around, especially on imported cars, so treat the range as the years to look hardest at rather than a guarantee either way. The official records tell you the exact build and first registration date for the car in front of you.

How do I check for it before I buy?

Perform a combustion gas (block) test on the coolant reservoir with engine warm and running. Check coolant level cold and look for oily residue on the cap. Inspect exhaust for sustained white steam. Check Ford VIN against extended warranty or recall campaigns. Review service records for previous head replacement. Look here: Cylinder head coolant gallery adjacent to EGR port, top of engine