If you are considering buying a used Ford Focus, there are several major reliability issues worth knowing about first. Our garage database tracks 36 known faults for this model, 28 of them rated high severity. Every one below is a repair bill a seller has good reason not to mention.
Found a Ford Focus for sale?
Paste the advert and we read it against these 36 known faults, its MOT history and the DVLA record, and tell you what the seller has not. Free, about a minute, no card.
Check a Ford Focus advert (free) →One owner each, in their own words rewritten as a line, and not counted in our risk scoring. A fault joins the list above once a second report or an editorial source backs it.
One owner each, in their own words rewritten as a line, and not counted in our risk scoring. A fault joins the list above once a second report or an editorial source backs it.
One owner each, in their own words rewritten as a line, and not counted in our risk scoring. A fault joins the list above once a second report or an editorial source backs it.
Sellers rarely admit these faults outright
We track 108 specific phrases sellers use in adverts to soft-pedal these exact issues. Paste any Ford Focus advert and we check it in seconds.
Check an advert now (free) →An overdue cambelt is the most expensive thing a seller can fail to mention on a used Focus. These are the figures UK specialists work to.
Ford originally specified 10 years / 150,000 miles for the 1.0 EcoBoost wet belt. Due to widespread failures where degraded belt material clogs the oil pickup and destroys the engine, Ford revised this to 6 years / 100,000 miles. Independent specialists strongly advise replacing even sooner (e.g. 60k-80k miles).
Ford's schedule splits on build date: 140,000 km (87,000 miles) or 10 years for cars built up to July 2011, and 180,000 km (112,500 miles) or 10 years after that. The shorter pre-2011 figure is recorded. This engine is known for tensioner problems, so it is critical to replace the water pump at the same time.
IMPORTANT: this four-cylinder 1.5 EcoBoost (2014-2018, Sigma-derived) runs a conventional DRY external cam belt and a crank-driven oil pump, so it has no belt-in-oil component at all. Do not confuse it with the 1.0 EcoBoost wet belt, or with the later Mk4 three-cylinder 1.5, which is chain driven. Ford officially recommends 150,000 miles or 10 years; specialists advise dropping this to 100,000 miles, which is recorded here.
The 1.6 Ti-VCT petrol (Sigma) uses a dry belt. Ford's schedule for this specific engine was reduced to 8 years / 100,000 miles, against 10 years / 100,000 for other Sigma variants, reportedly because the variable cam timing units load the belt harder. Some US-oriented sources quote 150,000 miles / 10 years; the shorter UK figure is recorded. Failures are rare but this is an interference engine.
The 2.0 TDCi (PSA DW10 Duratorq) is belt driven on a Ford schedule of 125,000 miles (200,000 km) or 10 years for belt, tensioner and idlers. The job is labour-heavy because the engine has to be lifted. NOTE: this row covers the Mk2 and Mk3 TDCi only. The Mk4 Focus 2.0 diesel is the EcoBlue, which runs a WET belt and is a different proposition entirely.
Always confirm against the vehicle handbook. Intervals vary by engine, and several manufacturers revised theirs after failures in service.
The Ford Focus has 36 known faults in our database across 3 generations, 28 of them rated high severity. The most serious are gearbox (the wet-clutch Powershift automatic transmission) and engine (timing belt tensioners on Zetec-E petrol engines are prone to failure). None of them makes the car a bad buy on its own; the risk is a seller who knows and says nothing.
Three stand out. Gearbox: the wet-clutch Powershift automatic transmission (Getrag 6DCT450) requires fresh fluid (typically 50000 to 80000 miles). Engine: timing belt tensioners on Zetec-E petrol engines are prone to failure (typically 60000 to 90000 miles). Engine: rainwater or washer fluid can drain into the spark plug orifices (typically 60000 to 100000 miles). The full list above is grouped by generation, with typical mileage and a rough repair cost for each.
No Ford Focus year is a write-off, but the Mk2 (2004 to 2011) carries the most serious faults: gearbox, engine, electrics, suspension and bodywork and trim. The Mk1 (1998 to 2004) and Mk3 (2011 to 2018) have high-severity faults on record too. Year matters less than whether the specific car has had the known fixes, so check the history for them.
Ask the seller about the gearbox and engine faults on this page and whether they have been fixed, with invoices. On the test drive watch for delay in engaging drive, sudden loss of engine power and engine misfires or runs roughly. Read the MOT history for repeat advisories, then paste the advert into the free check, which reads it against all 36 known faults before you travel. Check a Ford Focus advert →
Owners report 44.9 mpg on average across the Ford Focus engines with data, about 80% of the official combined figure. The gap between official and real-world economy varies a lot by engine, so the Real MPG page lists every engine and generation separately, from 9,033 owner submissions. Ford Focus Real MPG by engine →
Looking at a Ford Focus right now? Check the advert before you go and see it.
If you used to check the Honest John “Good & Bad” section before the site closed in 2026, this page is where that information now lives. We rebuilt the Ford Focus owner-report history from the archived Honest John dataset, added our own research, specialist and owner-club sources and DVSA recall data, and we keep it free. Each fault above is badged with its source. The same data feeds our free advert check, which reads a listing against every known fault for the exact engine and year.
CarAdCheck is not affiliated with Honest John or Volkswagen Financial Services. What happened to Honest John, and where each feature lives now.
Knowing what a Ford Focus goes wrong with is half of it. The rest is reading the advert and checking the car's history before you hand any money over.