IsItAGoodCar

Common Problems with the
2017–2019 Ford Fiesta Mk8 (B479)

We've identified 3 known issues that can affect the 2017–2019 Ford Fiesta Mk8 (B479). 2 of these are serious faults that could be expensive to repair.

3
Known Issues
2
Serious
0
Moderate
1
Minor

The 2017–2019 period has 2 more issues than the Ford Fiesta Mk8 (B479) average across all year periods.

All Known Issues

1.0 EcoBoost Wet Belt Degradation

SeriousEngine

Early Mk8 1.0 EcoBoost engines still use the oil-bath timing-belt setup that sheds material if servicing or oil quality is wrong, eventually starving the engine of oil pressure.

Most affected: 1.0 EcoBoost 100, 1.0 EcoBoost 125, 1.0 EcoBoost 140

Estimated cost: £900–£3,500Affects: 2017–2019Often appears around: 40,000-80,000 miles

Typical symptoms

  • •Low oil pressure warning
  • •Rattle from the timing end
  • •Rubber debris in oil or filter

What to inspect before you buy

  • ✓Demand full service history with the correct Ford-spec oil
  • ✓Check whether the belt has already been replaced
  • ✓Be wary of sellers who cannot explain the engine version clearly

Coolant Bottle, Hose and Thermostat Leaks

SeriousCooling System

Expansion tanks, hoses and thermostat housings can leak coolant gradually, and ignored low-level warnings risk overheating and head-gasket or engine damage.

Most affected: 1.0 EcoBoost, 1.1 Petrol

Estimated cost: £120–£900Affects: 2017–2021Often appears around: 20,000-70,000 miles

Typical symptoms

  • •Low coolant warning
  • •Pink staining around hoses or bottle
  • •Sweet smell or occasional overheating

What to inspect before you buy

  • ✓Inspect the expansion tank, hose joints and thermostat area from cold
  • ✓Check for unexplained coolant top-ups in the history
  • ✓Avoid cars with recent overheating excuses

SYNC 3 and Door-Latch Electrical Glitches

MinorElectrics & Electronics

Minor but common ownership irritations include touchscreen freezes, Bluetooth dropouts and door-latch or locking issues that have featured in Ford service actions.

Most affected: All trims

Estimated cost: £0–£350Affects: 2017–2023

Typical symptoms

  • •Frozen infotainment screen
  • •Phone pairing drops
  • •Door will not latch or unlock consistently

What to inspect before you buy

  • ✓Use media, navigation and phone functions on the drive
  • ✓Open and close every door repeatedly
  • ✓Check dealer history for software or latch campaign work

Buying Tips for the 2017 Ford Fiesta Mk8 (B479)

  • ✓Early 1.0 EcoBoost cars need hard evidence of correct-oil servicing and, ideally, earlier-than-book wet-belt work rather than vague promises.
  • ✓Watch coolant level and staining around the bottle and thermostat housing because small leaks can become big engine bills on these three-cylinder cars.
  • ✓Test Sync, Bluetooth, door latches and both keys properly, because software glitches and locking faults are common enough to use as bargaining points.
2020–2021 Ford Fiesta Mk8 (B479)

Browse 2017–2019 Ford Fiesta Mk8 (B479) in our Directory

View MOT history, registration data, and reliability scores for 2017–2019 Ford Fiesta Mk8 (B479) vehicles.

View 2017–2019 Directory

Other Ford Fiesta Mk8 (B479) Year Periods

2017–20192020–20212022–2023

Looking at a specific 2017 Ford Fiesta Mk8 (B479)?

Enter the registration number to check its full MOT history, outstanding finance, write-off status, and more.

Free Vehicle Check