Ford Fiesta ST
1.6L EcoBoost, 182 hp — in a car under 1,100 kg that is enough for pure driving fun. The Sound Symposer routes induction noise into the cabin; outside it sounds more modest than expected. Above 130 km/h things get lively — no wallflower. LSPI (Low Speed Pre-Ignition) at low revs and high load is the main technical issue — do not downshift and floor it below 2,000 rpm. Check turbo oil supply and ignition coils at high mileage. Every road-tester wants to drive the Fiesta ST — that says it all. Brakes are undersized for spirited driving, suspension crashes over motorway expansion joints. Recaro seats don't suit everyone. Under 1,100 kg with 182 hp — physics does the rest.
182 hp, 1,088 kg — the best driver's car under £20,000
Every journalist and every owner loves the Fiesta ST — that rarely happens. Responds to the slightest steering input like a dog fetching a ball. Beats much larger cars through corners. Brakes undersized, chassis thuds on motorways, Recaro seats don't suit everyone. But when the garage door opens, you're grinning.
Engine Weaknesses 8
Fragments of the clutch pressure plate can be ejected and strike engine components, causing smoke and fire in the engine bay. 1.0/1.5/1.6 EcoBoost with manual gearbox affected.
Symptoms: Smoke development, sudden power loss, in extreme cases engine bay fire.
Without a coolant level warning, the engine can overheat and the cylinder head can crack. The 1.6 EcoBoost is highly susceptible to head damage when cooling is inadequate.
Symptoms: White exhaust smoke, severe coolant loss, engine seizure.
The oil feed line to the turbocharger is prone to leaks. Oil starvation causes bearing damage in the turbo. Typical failure pattern: shaft seal failed, oil enters the intercooler.
Symptoms: Blue smoke on acceleration; oil film in intake tract or intercooler; increased oil consumption; power loss at higher revs.
Ford recalled approximately 56,000 vehicles with the 1.6 EcoBoost (2010–2014). The missing coolant level warning allowed engine operation with insufficient coolant, causing cylinder head cracks. Retrofit: sensor plus software update.
Symptoms: No warning on coolant loss, engine overheats unnoticed, white smoke, power loss, in worst case irreparable engine damage
The 1.6 EcoBoost (Focus, Kuga) suffered piston ring fractures and cylinder bore scoring, in some cases under 110,000 km. The downsized design places high stress on components; the cause is often a combination of overheating and oil starvation.
Symptoms: Zero compression in one cylinder, severe misfiring, no power build-up, engine beyond repair, replacement engine cost £5,500–£7,500
Ford recalled 2014–2015 Fiesta ST (1.6 EcoBoost) for cylinder head cracks. Coolant passages in the head casting caused hot spots; coolant loss without warning was possible. Revised head from 2016 onwards.
Symptoms: Gradual coolant loss without visible leak, rising coolant temperature gauge, white exhaust smoke.
The PCV valve in the cam cover allows oil mist into the intake. Under full load, oil enters the combustion chambers — soot deposits, knock tendency and spark plug fouling are the result.
Symptoms: Oil film in intake tract, fouled spark plugs, hesitation under load, increased oil consumption, misfire fault codes.
Direct injection without port wash leads to carbon build-up on inlet valves over time. Particularly accelerated with short-trip use.
Symptoms: Hesitation on cold start, slight power loss, increased fuel consumption.
Vehicle Weaknesses 6
Brake lines and fuel lines corrode faster than comparable competitors. TÜV inspection failures due to brake line corrosion are common. Leaking lines are a safety-critical issue.
Brake lines corrode faster than on comparable competitors. On older vehicles there is a risk of line fractures, which can cause complete brake failure. Check thoroughly before buying.
Rear springs break through corrosion at the lowest coil, similar to the predecessor. Shock absorbers leak prematurely and ride quality deteriorates.
A defective auxiliary heater relay results in inadequate cabin warming. The heater blows little or no warm air in cold temperatures. Solution: relay replacement per TSI 70/2010.
Window regulator mechanisms fail and the glass refuses to move or sticks. Steering column stalk (indicators/wipers) responds unreliably or fails completely.
Worn driveshafts create vibrations when accelerating and cornering. Common on vehicles over 100,000 km. Driveshaft bearings and CV boots wear prematurely.
Reports & Tests
3010 owner complaints filed with NHTSA (2008–2017). Most reported: Powertrain (1461), Engine (485), Body Structure (406).