Ford Fiesta Mk6 1.25 82bhp Known Faults

Modern vehicles use smart charging systems to reduce engine load, but the complex regulators on the alternators frequently fail.

The starter motor wears out internally. This is particularly common on vehicles equipped with Stop/Start systems.

The concentric slave cylinder (CSC) inside the gearbox bellhousing fails, leaking hydraulic fluid and causing clutch failure.

A very common MOT failure in the UK. Suspension coil springs corrode and snap, usually near the bottom pigtail.

Front wheel bearing wear is extremely common on the Mk6 Fiesta. Most examples will need at least one bearing replaced between 60,000 and 100,000 miles.

The hydraulic power steering pump on the Mk6 Fiesta fails with age and mileage, making the steering very heavy — especially at low speeds and when parking.

The single coil pack block fails, causing a 2-cylinder misfire.

The core plugs (freeze plugs) between the spark plugs rust, leaking coolant into the spark plug wells.

The 1.25 Duratec petrol engine develops a timing chain rattle on cold starts at higher mileages. The hydraulic tensioner loses pressure overnight, causing a brief rattle until oil pressure builds.

The Mk6 Fiesta is now 10+ years old and sill corrosion is increasingly common on UK examples. Bubbling paint along the sill seam and rear arch lip is a typical MOT failure point.

Clutch wear on the Fiesta Mk6 1.25 is a regular occurrence at 60,000-90,000 miles. The biting point migrates towards the top of the pedal travel as the friction plate wears down.

The floating brake caliper design relies on sliding pins. In the UK climate, salt and water ingress cause these pins to rust and seize solid.

Wheel bearing wear is a normal consumable on UK roads, but frequent pothole strikes accelerate the failure rate significantly.

Coil packs break down internally with heat and age, causing severe misfires under load.

Shock absorbers lose their damping efficiency over time, and eventually blow their seals, leaking hydraulic fluid.

The air conditioning condenser is mounted at the very front of the cooling pack, making it highly susceptible to stone damage from the road, leading to refrigerant loss.

The front anti-roll bar drop links wear out on heavily potholed UK roads, causing an annoying knocking sound at low speeds.

The cables inside the electric window regulator mechanism fray and snap, causing the window glass to drop into the door frame.

The engine coolant thermostat fails in the 'open' position. The engine never reaches its optimal operating temperature, killing fuel economy.

Lead-acid and AGM batteries have a finite lifespan. Modern cars are highly sensitive to voltage drops, causing bizarre electrical faults before the battery completely dies.